# ONKA Elektrik OPK Universal Spring Terminal Block 4mm2 Grey

**URL:** https://aio.lv/en/product--onka-elektrik-onka-1512--12447532
**Data updated:** 2026-05-18 02:43 (EEST)
**Category:** Power Sockets
**Manufacturer:** ONKA Elektrik
**Manufacturer code:** ONKA-1512
**EAN:** 5900103207748
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 4.49 €
**Prices and availability valid until:** 2026-08-04 23:59
**Price without VAT (21%):** 3.71 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--onka-elektrik-onka-1512--12447532

## 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 OPK universal spring terminal block is designed for secure and reliable wire connections in electrical installations. Featuring a 4mm2 capacity and a durable grey housing, this spring-loaded terminal ensures efficient contact and vibration resistance. It is ideal for industrial and residential wiring systems, providing a compact and professional solution for circuit distribution and connectivity.

## Long description

The ONKA Elektrik OPK universal spring terminal block is a high-quality component engineered for secure and efficient wire termination in diverse electrical systems. Designed to accommodate conductors up to 4mm2, this terminal block utilizes a robust spring-clamp mechanism that ensures consistent contact pressure, effectively eliminating the need for frequent maintenance or retightening. Its durable grey housing is built to withstand demanding environments, providing a reliable solution for both industrial control panels and residential electrical distribution.
Advantages
The primary benefit of this spring terminal block is its superior vibration resistance, which makes it an excellent choice for applications where mechanical stability is critical. The spring-loaded design significantly reduces installation time compared to traditional screw terminals, as it allows for quick and tool-free wire insertion. Furthermore, the compact footprint of the unit enables high-density wiring configurations, helping to optimize space within electrical enclosures while maintaining a clean and professional layout.
Suitable for
Industrial automation and control panels
Residential and commercial electrical distribution boards
Lighting and HVAC system wiring
Machinery and equipment connectivity
When it may not be suitable
This terminal block is not intended for use with high-current power distribution applications exceeding its rated capacity. It is also not suitable for environments exposed to extreme chemical corrosion or direct outdoor elements without an appropriate protective enclosure.
Key specifications
Conductor capacity: 4mm2
Connection type: Spring-clamp
Housing material: Durable industrial-grade plastic
Color: Grey
Mounting style: DIN rail compatible
How to use
To use the terminal block, strip the insulation from the end of the wire according to the recommended length. Insert a flat-head screwdriver into the designated slot to open the spring clamp, then insert the conductor fully into the terminal opening. Release the screwdriver to allow the spring to clamp down securely on the wire. Ensure the connection is firm by gently pulling on the wire to verify it is locked in place.
What to consider before purchase
Verify that the wire gauge matches the 4mm2 capacity requirement.
Ensure the mounting rail type is compatible with the terminal block design.
Check the total number of connections needed for your specific circuit layout.
Usage recommendations
Always ensure that the power supply is completely disconnected before performing any wiring operations. Use appropriate wire strippers to avoid damaging the conductor strands, which could compromise the integrity of the spring connection.

## FAQ

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

The price is 4.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 116 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/12447532/68750585_large.webp