# ONKA Elektrik MRK Universal Screw Terminal Block 4mm2 Grey

**URL:** https://aio.lv/en/product--onka-elektrik-onka-1022--12451262
**Data updated:** 2026-05-18 02:42 (EEST)
**Category:** Power Sockets
**Manufacturer:** ONKA Elektrik
**Manufacturer code:** ONKA-1022
**EAN:** 5900103207359
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 3.99 €
**Prices and availability valid until:** 2026-08-03 23:59
**Price without VAT (21%):** 3.30 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--onka-elektrik-onka-1022--12451262

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

The ONKA Elektrik MRK universal screw terminal block is designed for reliable electrical connections in control panels and industrial installations. Featuring a 4mm2 cross-section capacity, this grey terminal block ensures secure wire termination and efficient circuit management. It is built for durability and ease of use in professional electrical engineering applications.

## Long description

The ONKA Elektrik MRK universal screw terminal block is a professional-grade component engineered for secure and efficient electrical wiring in industrial environments and control panels. Designed to accommodate a 4mm2 cross-section, this terminal block provides a robust connection point that ensures long-term stability and electrical integrity for various circuit configurations. Its grey housing is constructed from high-quality, durable materials that withstand the rigors of demanding electrical installations.
Advantages
This terminal block offers exceptional reliability due to its precision-engineered screw connection mechanism, which maintains consistent contact pressure on the conductor. The compact design allows for high-density mounting on standard DIN rails, optimizing space within electrical enclosures. Furthermore, the high-grade insulating material provides excellent protection against mechanical stress and environmental factors, ensuring safe operation in professional electrical systems.
Suitable for
Control panel wiring and distribution
Industrial automation systems
Electrical junction boxes
Power distribution networks
Machine control circuits
When it may not be suitable
This terminal block is not intended for use with conductors exceeding its rated 4mm2 capacity or for applications requiring specialized high-current or high-voltage insulation beyond standard industrial specifications. It is also not suitable for direct outdoor exposure without a protective, weather-rated enclosure.
Key specifications
Rated cross-section: 4mm2
Connection type: Screw terminal
Color: Grey
Mounting: DIN rail compatible
Application: Industrial and control panel wiring
How to use
To install the terminal block, snap it securely onto a standard DIN rail. Strip the insulation from the end of your wire to the appropriate length, insert the conductor into the terminal opening, and tighten the screw firmly using a compatible screwdriver. Ensure the wire is fully seated and the connection is tight before applying power to the circuit. Always verify that the wire gauge matches the terminal capacity to prevent overheating or loose connections.
What to consider before purchase
Ensure the 4mm2 capacity matches your specific wire gauge requirements.
Verify that your mounting rail system is compatible with standard terminal block dimensions.
Confirm the total number of connections required for your project to purchase the correct quantity.
Usage recommendations
For optimal performance and safety, always use calibrated tools for tightening screws and ensure that all connections are inspected periodically for signs of wear or loosening, especially in environments subject to vibration.

## FAQ

### How much does the ONKA Elektrik MRK 4mm2 Screw Terminal Block cost, and is it available for purchase?

The price is 3.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 1318 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 23.07.2026 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 ONKA Elektrik 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 ONKA Elektrik 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/12451262/68753973_large.webp