# ONKA Elektrik MRK Screw Terminal Block, 4-Conductor, 4mm2, Grey

**URL:** https://aio.lv/en/product--onka-elektrik-onka-1652--12462747
**Data updated:** 2026-05-18 09:37 (EEST)
**Category:** Power Sockets
**Manufacturer:** ONKA Elektrik
**Manufacturer code:** ONKA-1652
**EAN:** 5900103207427
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 6.49 €
**Prices and availability valid until:** 2026-08-04 23:59
**Price without VAT (21%):** 5.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--onka-elektrik-onka-1652--12462747

## 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 screw terminal block is a reliable 4-conductor connection solution designed for 4mm2 wire cross-sections. This grey terminal block ensures secure electrical connectivity in industrial and control panel applications. Its robust design facilitates efficient wiring management and long-term performance in various electrical installations.

## Long description

The ONKA Elektrik MRK screw terminal block is a professional-grade 4-conductor connection component engineered for 4mm2 wire cross-sections. Designed for high-density wiring environments, this grey terminal block provides a secure and stable electrical connection, making it an essential element for industrial control panels and complex electrical distribution systems. Its durable construction ensures consistent performance and reliable conductivity over extended periods of operation.
Advantages
This terminal block offers a robust screw connection mechanism that guarantees high contact pressure and vibration resistance, ensuring that wires remain firmly in place even in demanding industrial settings. The 4-conductor design allows for efficient branching and distribution of electrical signals or power within a compact footprint, helping to optimize space inside control cabinets. Its high-quality insulating material provides excellent electrical safety, while the standardized grey color facilitates easy identification and organization during installation and maintenance tasks.
Suitable for
Industrial control panels
Electrical distribution boards
Automation and instrumentation systems
Building management and infrastructure wiring
When it may not be suitable
This terminal block is not intended for use with wire sizes exceeding 4mm2 or for applications requiring specialized high-current power distribution beyond its rated capacity. It is also not suitable for direct outdoor exposure without a protective enclosure that meets appropriate IP rating standards.
Key specifications
Conductor capacity: 4mm2
Connection type: Screw terminal
Configuration: 4-conductor
Color: Grey
Application: Industrial and control panel wiring
How to use
To install the terminal block, securely mount it onto a standard DIN rail until it clicks into position. Strip the insulation from your wires to the recommended length, insert the conductor into the terminal opening, and tighten the screw using a compatible screwdriver to ensure a firm connection. Verify that the wire is held securely by pulling gently on it. Ensure that all connections are tightened to the specified torque to prevent overheating or loose contacts.
What to consider before purchase
Verify that the 4mm2 wire size matches your specific project requirements.
Ensure the terminal block is compatible with your existing DIN rail mounting system.
Check the total number of connections needed to determine the quantity of blocks required.
Usage recommendations
Always ensure that the power supply is completely disconnected before performing any wiring or maintenance work on the terminal block to prevent electrical hazards.

## FAQ

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

The price is 6.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 71 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/12462747/68764544_large.webp