# Wago 281-637 Ground Terminal Block Green Yellow 3-Conductor 4 mm

**URL:** https://aio.lv/en/product--wago-281-637--12593759
**Data updated:** 2026-07-27 18:22 (EEST)
**Category:** Other goods
**Manufacturer:** Wago
**Manufacturer code:** 281-637
**EAN:** 4045454084516
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 8.99 €
**Prices and availability valid until:** 2026-08-27 23:59
**Price without VAT (21%):** 7.43 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--wago-281-637--12593759

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 11.08.2026 | free |
| Pickup points | 14.08.2026 | 1.79 EUR |
| Courier delivery to door | 14.08.2026 | 4.99 EUR |

## Summary description

The Wago 281-637 is a 3-conductor ground terminal block in green and yellow, designed for secure and reliable electrical wire connections. Featuring a 4 mm capacity, this protective earth terminal is ideal for professional electrical installations, control panels, and distribution boards, ensuring safe grounding and efficient circuit organization.

## Long description

The Wago 281-637 ground terminal block in green and yellow is engineered for secure and reliable electrical wire connections in various professional applications. Featuring a 3-conductor design and a 4 mm capacity, this protective earth terminal serves as an essential component for electrical installations, control panels, and distribution boards. It provides safe grounding and helps maintain efficient circuit organization within complex wiring systems. Built with precision dimensions of 6 mm width, 61.5 mm depth, and 37 mm height, it integrates seamlessly into standard rail-mounted assemblies.
Advantages
This ground terminal block offers robust mechanical stability and secure electrical contact, ensuring long-term reliability under continuous operational demands. The clear green and yellow color coding allows for immediate identification of the protective earth conductor, enhancing safety and compliance during installation and maintenance procedures. Its compact profile optimizes space on mounting rails while accommodating reliable three-wire connections for efficient distribution of grounding potentials.
Suitable for
Professional electrical installations
Control panels and switchgear manufacturing
Distribution boards and sub-distribution units
Industrial automation and machinery wiring
When it may not be suitable
This terminal block is not designed for direct connection to uninsulated live conductors carrying phase or neutral current, as it is strictly intended for protective earth applications. It may also not be suitable for wire cross-sections significantly exceeding the specified 4 mm capacity without appropriate adaptation.
Key specifications
3-conductor design
4 mm capacity
Green and yellow protective earth coloring
Width: 6 mm
Depth: 61.5 mm
Height: 37 mm
How to use
To use the Wago 281-637 ground terminal block, secure it firmly onto a compatible mounting rail within your enclosure or distribution board. Strip the appropriate length of insulation from the electrical conductors to expose the bare wire. Insert the stripped wires into the designated conductor entry points of the terminal block until they are fully seated and securely clamped, ensuring a reliable mechanical and electrical connection to the protective earth system.
What to consider before purchase
Verify that the 4 mm wire capacity matches your specific conductor requirements
Ensure compatibility with your existing mounting rail system
Confirm that the green and yellow color scheme meets your local electrical identification standards
Usage recommendations: Always isolate the power supply before installing or servicing any electrical components, and ensure that all wire connections are properly secured and tested according to relevant electrical safety codes.

## Specifications

| Feature | Value |
|---|---|
| Certification | RoHS |
| Material | Polyamide |
| Height | 37 mm |
| Width | 6 mm |
| Depth | 61.5 mm |
| Product colour | Green, Yellow |
| Connector contacts plating | Copper |
| Maximum cable section | 4 mm² |
| Minimum cable section | 0.08 mm² |

## FAQ

### How much does the Wago 281-637 Terminal Block cost, and is it available for purchase?

The price is 8.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 46 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 11.08.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Wago products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Wago service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12593759/68974081_large.webp