In most control panels, the first things people notice are the contactors, breakers, and PLCs. The small grey plates on the ends of terminal blocks almost disappear into the background—until safety, compliance, or neat wiring becomes a problem. That’s where the Wieland 07.311 1553 terminal block cover quietly does its job. This slim end-plate for WK-series DIN-rail terminal blocks caps the open side of the block, hides exposed copper, and helps you maintain safe creepage and clearance distances. For panel builders, OEMs, and maintenance engineers, understanding what the Wieland 07.311 1553 terminal block cover actually does, what it’s made of, and where it fits can save time on design, installation, and procurement. In this in-depth guide we’ll unpack the specs, compatible blocks, typical applications, and ordering notes, so you can quickly decide whether the Wieland 07.311 1553 terminal block cover fits the needs of your next project.
What Is the Wieland 07.311 1553 Terminal Block Cover?
At its core, the Wieland 07.311 1553 terminal block cover is an end-plate (sometimes called an end-cover or end-cap) for DIN-rail terminal blocks in Wieland’s WK family. When you assemble a row of feed-through terminals on a DIN rail, the last block in the row has one open side where live metal can be visible. The Wieland 07.311 1553 terminal block cover snaps onto that open side and turns it into a smooth, insulated surface. This keeps operators’ fingers away from copper, clearly finishes the row, and supports the terminal block’s overall IP20 (finger-safe) rating.
Wieland identifies this part in many catalogues as an accessory for WK/WKN series terminal blocks in the 4 mm² range. In simple terms, if you are using WK 4-series feed-through terminals, the Wieland 07.311 1553 terminal block cover is very likely the matching end-plate you need. It does not carry current, it doesn’t change the electrical rating of the block, and it doesn’t require screws or tools. It is a purely mechanical, protective accessory—but a very important one for safe wiring.
The part is moulded in a light-grey thermoplastic known in Wieland’s colour system as TW35, which corresponds roughly to the common RAL7035 control-panel grey. That’s why the Wieland 07.311 1553 terminal block cover is sometimes referenced as “Gray TW35” in distributor listings. It blends visually with most industrial panels, making the terminal row look finished and tidy rather than leaving a jagged, open end.
Key Technical Specs of the Wieland 07.311 1553 Terminal Block Cover
Although it looks simple, the Wieland 07.311 1553 terminal block cover is designed to meet the same demanding environments as the terminal blocks it protects. Understanding its key properties helps you assess whether it suits your panel’s mechanical and environmental requirements.
Here are the main technical characteristics associated with the Wieland 07.311 1553 terminal block cover:
● Function: End-plate / end-cover for WK-series DIN-rail terminal blocks, 4 mm² class.
● Colour: Light grey, Wieland TW35 (approximately RAL7035).
● Material: Flame-retardant thermoplastic, typically a polyamide (nylon) formulation used in terminal accessories.
● Flammability: Plastic rated to a UL94 V-0 flammability rating, meaning the Wieland 07.311 1553 terminal block cover is self-extinguishing and suitable for use inside industrial control panels where flame-resistance is a requirement.
● Approximate thickness: Around 2–3 mm, similar to other Wieland and competitor end-plates.
● Approximate height and depth: Comparable to a WK 4-series terminal—roughly 45–50 mm tall and around 40 mm deep, so the Wieland 07.311 1553 terminal block cover aligns neatly with the profile of the block.
● Weight: Only a few grams per piece, adding almost no weight to the DIN-rail assembly.
● Typical temperature capability: While explicit values are not always listed, similar polyamide accessories used alongside the Wieland 07.311 1553 terminal block cover are suitable from around –20 °C up to +70 °C in standard control-cabinet environments.
Because it is part of a complete WK terminal block system, the Wieland 07.311 1553 terminal block cover contributes to the overall IP20 rating by closing off open sides. On its own it does not have a standalone IP rating, but when installed correctly on a terminal block and housed in a standard panel or enclosure, it supports finger-safe operation in accordance with IEC requirements.
Where the Wieland 07.311 1553 Terminal Block Cover Fits
One of the first questions panel designers ask is, “Will this accessory actually fit my terminals?” The Wieland 07.311 1553 terminal block cover is specifically designed to match the geometry of Wieland WK-series terminal blocks in the 4 mm² class. That generally includes WK 4 feed-through terminals, WK 4 S/32 variants, and related single- and multi-level versions listed in Wieland’s catalogues.
Because WK terminals and their accessories are precision moulded, the Wieland 07.311 1553 terminal block cover uses keyed latching features that align with the end profile of the matching block. This ensures that the end-plate snaps on positively and cannot be installed on the wrong side or on an incompatible block. When you push the Wieland 07.311 1553 terminal block cover onto the end of a WK 4 terminal, you should feel a firm click as the lugs engage and lock it in place.
The cover does not require additional screws, clamps, or hardware. It simply relies on its moulded clips and the rigidity of the plastic. This makes the Wieland 07.311 1553 terminal block cover quick to install during panel assembly and easy to remove later if you need to extend the terminal row. It is usually applied at the very end of the row, but in some layouts it can also be used between groups of terminals to create visual separation between circuits.
If you are using terminal blocks from another manufacturer (for example, Phoenix Contact, Weidmüller, or generic DIN-rail blocks), the Wieland 07.311 1553 terminal block cover is unlikely to be a perfect mechanical fit. Other brands offer their own equivalent end-covers that match their own profiles. However, within a Wieland WK installation, sticking with the Wieland 07.311 1553 terminal block cover ensures that form, colour, and safety performance are all consistent across the row.
Why Panel Builders Choose the Wieland 07.311 1553 Terminal Block Cover
At first glance, you might be tempted to treat end-plates as an afterthought. Yet many experienced panel builders deliberately specify the Wieland 07.311 1553 terminal block cover in their bill of materials right from the design stage. There are several practical reasons for this.
First, using the Wieland 07.311 1553 terminal block cover creates a clear, finished look at the end of your terminal rows. This makes wiring diagrams easier to follow in the field, assists maintenance personnel in recognising where circuits begin and end, and supports a culture of tidy workmanship. In large cabinets, that kind of visual clarity reduces troubleshooting time and improves safety.
Second, the Wieland 07.311 1553 terminal block cover prevents accidental contact with live conductors. Whenever a terminal block is mounted on a rail, the last terminal in the row often has one side where the metal parts are otherwise exposed. By closing that side, the end-plate helps maintain creepage and clearance distances, particularly in crowded control cabinets. It is a simple way to support both IEC 60947-7-1 compliance and internal company safety rules.
Third, the Wieland 07.311 1553 terminal block cover helps you stay organised with spare terminals. If you intentionally leave a few spare WK 4 terminals in a row to support future modifications, capping the end with an end-plate protects those unused positions until they are needed. When new circuits are added later, you can simply remove the Wieland 07.311 1553 terminal block cover, wire the new terminal, and then reinstall the cover at the new end of the row.
Finally, because the part is low-cost, incorporating the Wieland 07.311 1553 terminal block cover from the start adds very little to the total project budget—while delivering a clear gain in safety, aesthetics, and maintenance convenience.
Installation Tips for the Wieland 07.311 1553 Terminal Block Cover
Installing the Wieland 07.311 1553 terminal block cover is straightforward, but a few simple practices will help you achieve a solid, reliable fit every time. Think of it as the final step in building a tidy terminal row.
1. Plan the terminal row layout.
Before you start clipping on end-plates, double-check the number and sequence of WK 4 terminals you need. Ensure that any cross-connectors, jumpers, and markers are already in place. Once the row is complete, you can identify the open end that will receive the Wieland 07.311 1553 terminal block cover.
2. Align the cover with the block profile.
Hold the Wieland 07.311 1553 terminal block cover so that its internal lugs line up with the recesses on the side of the terminal block. The profile is asymmetrical, so if it doesn’t seem to line up, simply flip the cover and try the other orientation. Never force the cover; the correct alignment will feel natural and balanced.
3. Press firmly until it clicks.
Once aligned, push the Wieland 07.311 1553 terminal block cover straight onto the open side of the terminal. Apply even pressure with your thumb near the centre of the plate. You should hear or feel a gentle click as the latch features engage. Give the cover a very slight tug to confirm that it is seated properly.
4. Check for uniform height and spacing.
After mounting the Wieland 07.311 1553 terminal block cover, visually inspect the row from the front and side. The cover should sit flush with the terminal’s top edge and follow its contours. If the cover looks skewed or raised, remove it carefully, inspect for obstructions, and reinstall.
5. Removing or relocating the cover.
If you later need to extend the row or change the layout, you can remove the Wieland 07.311 1553 terminal block cover by gently prying the latch with a flat screwdriver or by pulling and flexing the plate slightly at the edge. Avoid excessive force; the thermoplastic is tough but not indestructible. Once removed, the same cover can typically be re-used in the new position.
By following these simple steps, you ensure that each Wieland 07.311 1553 terminal block cover is securely installed and continues to provide effective protection throughout the life of your panel.
Safety and Compliance Benefits of the Wieland 07.311 1553 Terminal Block Cover
Regulatory requirements for industrial control panels continue to tighten worldwide. Although they may seem minor, accessories such as the Wieland 07.311 1553 terminal block cover play a supporting role in meeting those standards. When designing or certifying a panel, you need to consider both the primary components and the small parts that complete the system.
The base material of the Wieland 07.311 1553 terminal block cover is a thermoplastic with a RoHS regulations compliant profile and a UL94 V-0 flammability rating. In practice, this means that if the cover is exposed to a small flame, it will self-extinguish quickly and will not drip molten flaming material. This behaviour is essential in densely wired cabinets where even a small local fire could otherwise spread across plastic parts.
Because it is part of a WK terminal block system, the Wieland 07.311 1553 terminal block cover helps maintain the finger-safe IP20 rating of the installation. IP20 means that a human finger cannot touch live parts under normal operating conditions. When the open side of a terminal block is properly closed off with an end-plate, the risk of accidental contact is significantly reduced, particularly during routine inspections or minor modifications.
From a materials standpoint, the Wieland 07.311 1553 terminal block cover is designed to be compliant with RoHS and REACH regulations, meaning it does not contain restricted hazardous substances above allowed thresholds. That is increasingly important for global OEMs who need to ensure every item on their bill of materials can be exported, installed, and serviced in different regulatory jurisdictions.
On its own, the Wieland 07.311 1553 terminal block cover is not a separately certified product like a circuit breaker or a contactor. Instead, it forms part of a certified system. When you combine WK series terminals with their matching end-plates, markers, and accessories, you maintain the intended performance that Wieland designed and tested at system level.
Environmental Considerations for the Wieland 07.311 1553 Terminal Block Cover
Not every control cabinet lives in a clean, air-conditioned environment. Many do, but others end up installed in dusty workshops, damp pump rooms, or hot factory floors. Knowing how the Wieland 07.311 1553 terminal block cover behaves in typical environmental conditions will help you decide where it is most suitable.
Thermoplastics such as the material used in the Wieland 07.311 1553 terminal block cover generally perform well in standard indoor environments. They are resistant to many oils, greases, and neutral cleaning agents commonly found in machinery spaces. Because the cover is only a few millimetres thick, it is not heavily stressed mechanically once installed; it simply sits against the side of the terminal block.
However, like most polyamide-based accessories, the Wieland 07.311 1553 terminal block cover is not intended for constant direct sunlight or long-term outdoor exposure without an enclosure. UV radiation can slowly discolour and embrittle the plastic over many years. For outdoor installations, it is best practice to house the entire WK terminal assembly—including the Wieland 07.311 1553 terminal block cover—inside a suitable weatherproof enclosure that provides at least IP54 protection.
In chemical environments, the compatibility of the Wieland 07.311 1553 terminal block cover will depend on the specific media present. Mild detergents, lubricating oils, and non-aggressive industrial atmospheres are generally acceptable. Highly acidic or alkaline vapours, strong solvents, or certain aggressive gases may attack the plastic over time. In such cases, consulting Wieland’s broader guidance on material resistance, or choosing a more specialised housing, is recommended.
For applications subject to regular washdown or high humidity, remember that the Wieland 07.311 1553 terminal block cover itself is only part of a system. It does not seal the terminal block against water ingress, but it does help minimise direct splash to the end of the terminal. As always, the primary protection in wet environments should come from a properly rated enclosure, with the Wieland 07.311 1553 terminal block cover providing internal touch protection rather than environmental sealing.
How the Wieland 07.311 1553 Terminal Block Cover Compares to Alternatives
In many projects you may encounter other brands of end-plates and covers, especially if you work with mixed-manufacturer panels. How does the Wieland 07.311 1553 terminal block cover compare to similar products from competitors?
Functionally, the Wieland 07.311 1553 terminal block cover does much the same job as end-plates from Phoenix Contact, Weidmüller, and other suppliers. These accessories all close off the open end of a terminal block, provide finger-safe protection, and complete the visual appearance of the row. They are usually made from similar flame-retardant polyamides and designed for IP20 environments.
The main differences lie in geometry and system integration. The Wieland 07.311 1553 terminal block cover is precision-shaped to match the outline of the WK 4 series terminals. Phoenix, for example, offers its own D-UT 2,5/10 end cover for UT terminals, and Weidmüller provides AP end-plates for SAK-type terminals. These parts are not normally interchangeable because each brand’s terminal blocks have unique profiles. For that reason, when you use WK terminals, staying with the Wieland 07.311 1553 terminal block cover ensures that everything lines up mechanically.
Another advantage of the Wieland 07.311 1553 terminal block cover is colour consistency. Wieland’s TW35 grey is widely used across its range of enclosures and terminal accessories. When you build a panel entirely around that ecosystem, the rails, blocks, and covers all share the same neutral tone. This creates a clean, professional look that many OEMs value when presenting their equipment to end users or inspectors.
Finally, from a procurement perspective, using the Wieland 07.311 1553 terminal block cover keeps your bill of materials aligned with a single manufacturer. That can simplify stocking, reduce the number of vendor relationships you need to manage, and make global approvals easier. If a customer later asks for documentation, referencing one family of products is much simpler than explaining a mix of mismatched accessories.
Ordering, Packaging, and Value of the Wieland 07.311 1553 Terminal Block Cover
End-plates are inexpensive, but they still deserve a place in your project planning. Knowing how the Wieland 07.311 1553 terminal block cover is packaged and priced will help you estimate quantities accurately and avoid delays.
Distributors commonly sell the Wieland 07.311 1553 terminal block cover in small packs—often in bags or boxes of ten pieces. This is convenient for panel builders who might need only a handful of covers per cabinet. Some suppliers also offer single-piece sales for maintenance or repair work. In any case, the order minimum is typically low, so you can easily round up quantities to have a few spares on hand.
In terms of pricing, the Wieland 07.311 1553 terminal block cover usually falls in the range of roughly half a US dollar to around a dollar per piece when converted from local currencies, depending on pack size and region. For comparison, similar AP and TW-series covers from Wieland often cost just a few euros or dollars per pack of ten. When you consider how much impact the Wieland 07.311 1553 terminal block cover has on safety and aesthetics, that cost is modest.
Because the part number is precise, always quote it in full when placing orders—“07.311 1553” or “07.311.1553.0”—to make sure you receive the correct grey TW35 version of the Wieland 07.311 1553 terminal block cover. That also makes it easier for distributors to cross-check stock and confirm availability immediately.
If you are standardising on WK-series terminals, many engineers choose to keep a small stock of Wieland 07.311 1553 terminal block cover pieces in their workshop as part of a general spare-parts kit. That way, whenever a cabinet is modified or extended, the installer can always finish the new row neatly and safely without waiting for a separate order.
Practical Application Ideas for the Wieland 07.311 1553 Terminal Block Cover
Sometimes it helps to picture how a component will actually be used in real-world equipment. The Wieland 07.311 1553 terminal block cover appears in many types of installations wherever WK terminals are used. Here are some common scenarios.
Machine and process control panels
In machinery control cabinets, rows of WK terminals distribute power and signals between field devices and the PLC or control electronics. The Wieland 07.311 1553 terminal block cover finishes these rows at the ends, particularly where control-voltage and power circuits meet. This not only looks clean but also encourages technicians to respect boundaries between different voltage levels.
Building automation and HVAC panels
In building management systems, WK terminals carry I/O to sensors, actuators, and controllers spread across a facility. Using the Wieland 07.311 1553 terminal block cover at the ends of terminal groups—for example, separating fan-coil unit connections from general I/O—helps facilities teams understand panel structure instantly when they open the door.
Power distribution and motor control centres
Wherever there are motor feeders, control transformers, or small power distribution sections, you’ll often find DIN-rail terminals interconnecting components. The Wieland 07.311 1553 terminal block cover caps the last terminals in each group, so maintenance electricians have a clear indication that they’ve reached the end of a circuit row.
OEM equipment and exported systems
For OEMs shipping machines internationally, neat wiring is not just about looks; it’s also about demonstrating quality and professionalism. By consistently using the Wieland 07.311 1553 terminal block cover at the end of every WK terminal row, you show inspectors and customers that attention has been paid even to small safety details.
In all these applications, the Wieland 07.311 1553 terminal block cover contributes to a panel that is easier to understand, safer to touch, and more aesthetically pleasing. This, in turn, supports faster commissioning, fewer mistakes, and smoother long-term maintenance.
Best Practices When Specifying the Wieland 07.311 1553 Terminal Block Cover
When you create a bill of materials for a new panel design, there are a few best practices that can help you make the most of the Wieland 07.311 1553 terminal block cover.
1. Include end-plates in your initial BOM.
Instead of adding accessories later, count how many terminal rows you will have and include at least one Wieland 07.311 1553 terminal block cover per row from the start. If your design leaves spare terminals for future use, add extra covers so you can always finish the end of each active group.
2. Use the same colour scheme consistently.
Because the Wieland 07.311 1553 terminal block cover is grey TW35, matching the rest of the system, it reinforces a uniform appearance. Some users introduce blue or other coloured end-plates for specific functional groups, but when using the grey version, try to keep it consistent throughout the panel for a clean, professional aesthetic.
3. Document accessories on drawings.
In your schematic or layout drawings, it can be helpful to note the use of the Wieland 07.311 1553 terminal block cover at the end of each row. This reminds assembly technicians not to forget the end-plates and also signals to inspectors that the design intentionally includes touch protection at the row ends.
4. Stock a small buffer.
For workshops that build multiple panels each year, keeping a small reserve of Wieland 07.311 1553 terminal block cover pieces is an easy way to avoid delays. They take up minimal shelf space and have no shelf-life concerns under normal storage conditions.
5. Pair with matching WK accessories.
To get the best overall performance, combine the Wieland 07.311 1553 terminal block cover with other recommended WK accessories such as appropriate marker tags, jumpers, and end brackets. Using the full Wieland system ensures that everything fits properly and that the panel looks coherent and well thought-out.
By treating the Wieland 07.311 1553 terminal block cover as a deliberate design choice rather than an afterthought, you can enhance both the technical quality and visual impact of your DIN-rail installations.
Related Product Collections at Industrial Electrical Warehouse
If you’re planning or upgrading a control panel and the Wieland 07.311 1553 terminal block cover is on your shortlist, these related collections at Industrial Electrical Warehouse make it easier to source everything you need around it:
● Wieland Collection ➜
Browse a dedicated range of Wieland products, including terminal blocks, accessories, and other components designed to work seamlessly with the Wieland 07.311 1553 terminal block cover inside modern control panels.
● Power Distribution Collection ➜
Explore circuit breakers, relays, transformers, terminal blocks, and terminal accessories that help you build safe, efficient power distribution sections where the Wieland 07.311 1553 terminal block cover can complete DIN-rail rows.
● Conduit, Cable, Wire & Accessories Collection ➜
Find cables, conduit, and wiring accessories from trusted brands, so you can handle everything from field wiring to panel terminations that interface with your WK terminals and Wieland 07.311 1553 terminal block cover assemblies.
Conclusion: Is the Wieland 07.311 1553 Terminal Block Cover Right for Your Panel?
For such a small component, the Wieland 07.311 1553 terminal block cover brings together many of the qualities panel builders value most: safety, neatness, compatibility, and affordability. It finishes the end of a WK terminal row, supports IP20 finger-safe protection, and maintains a consistent grey TW35 appearance across your control cabinet. By choosing the Wieland 07.311 1553 terminal block cover, you are not just ticking an accessories box—you are taking a simple, effective step toward a better-built panel.
If you are already using WK-series terminals, or if you are planning a new project where clean wiring and reliable touch protection matter, it is worth considering the Wieland 07.311 1553 terminal block cover as a standard part of your design. Take a moment to review the detailed specifications, compatibility notes, and application ideas, and then compare them with the needs of your equipment.
When you are ready to explore pricing, stock levels, and additional technical details, visit the product page for the Wieland 07.311 1553 terminal block cover on your chosen supplier site. There you can confirm availability, download any related documentation, and decide how many end-plates you want to keep on hand for upcoming builds and maintenance work.
