# Erko SLK\_3SC19-125 Capacitor Switching Contactor 125A 690V

**URL:** https://aio.lv/en/product--erko-slk3sc19-125--12518871
**Data updated:** 2026-06-12 15:50 (EEST)
**Category:** Miscellaneous repair tools
**Manufacturer:** Erko
**Manufacturer code:** SLK\_3SC19-125
**EAN:** 5905912878165
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

The Erko SLK\_3SC19-125 is a specialized capacitor switching contactor designed for reliable power factor correction systems. With a rated current of 125A and an operating voltage of 690V, this device effectively manages high inrush currents associated with capacitor banks. It ensures stable operation and longevity in industrial electrical installations, providing a robust solution for reactive power compensation and electrical network optimization.

## Long description

The Erko SLK\_3SC19-125 is a specialized capacitor switching contactor engineered for high-performance power factor correction systems. Rated at 125A with an operating voltage of 690V, this contactor is specifically designed to handle the significant inrush currents that occur when switching capacitor banks. By providing a controlled connection, it protects the electrical infrastructure from transient surges, ensuring reliable operation and extended service life for both the capacitors and the associated electrical equipment in industrial environments.
Advantages
This contactor offers superior durability and reliability in demanding industrial applications. Its design minimizes the stress on electrical components during the charging phase of capacitor banks, which significantly reduces the risk of contact welding and premature wear. The robust construction ensures consistent performance under continuous operation, making it an essential component for maintaining efficiency in power distribution networks and optimizing reactive power compensation.
Suitable for
Power factor correction systems
Industrial reactive power compensation banks
Electrical network optimization in manufacturing facilities
Large-scale capacitor switching applications
When it may not be suitable
This device is specifically optimized for capacitor switching and may not be suitable for general-purpose motor control or standard resistive load switching. Using this contactor outside of its intended application for reactive power compensation may lead to suboptimal performance or premature failure of the device.
Key specifications
Rated current: 125A
Operating voltage: 690V
Application: Capacitor switching
Function: Power factor correction
How to use
The Erko SLK\_3SC19-125 should be installed by a qualified electrician within a control cabinet or distribution board. Ensure that the power supply is disconnected before installation. Connect the main power lines to the input terminals and the capacitor bank to the output terminals, following the wiring diagram provided with the unit. Verify that all connections are tightened to the specified torque to prevent overheating. Once installed, the contactor operates automatically as part of the power factor correction controller sequence.
What to consider before purchase
Ensure the rated current matches the requirements of your capacitor bank
Verify that the system voltage does not exceed 690V
Check available space in the electrical enclosure for mounting
Confirm compatibility with your existing power factor controller
Usage recommendations
Regularly inspect the contactor terminals for signs of heat damage or loose connections. Ensure the surrounding environment is free from excessive dust and moisture to maintain optimal performance and safety standards.

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. 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 Erko 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 Erko 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

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