# Residual-current circuit breaker with overcurrent protection 4P 20A B 30mA AC, Eti-Polam KZS-4M (002174005)

**URL:** https://aio.lv/en/product--eti-polam-002174005--12106434
**Data updated:** 2026-03-20 09:56 (EET)
**Category:** Power Sockets
**Manufacturer:** Eti-Polam
**Manufacturer code:** 002174005
**EAN:** 3838895552017
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 94.99 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 78.50 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--eti-polam-002174005--12106434

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Eti-Polam KZS-4M is a combined residual-current device with overcurrent protection (RCBO) in 4-pole configuration. Rated current 20 A, B-characteristic tripping curve, residual current sensitivity 30 mA, AC type (detects AC leaks). Designed for protection against earth leakage and overload/short-circuit in three-phase installations and distribution boards.

## Long description

Eti-Polam KZS-4M is a combined residual-current circuit breaker with overcurrent protection (RCBO) in a 4-pole design for three-phase installations. It provides selective disconnection by combining residual-current detection and overcurrent protection in a single device. The unit is rated for a nominal current of 20 A, uses a B-characteristic tripping curve for fast response to short circuits and overloads, and has a residual current sensitivity of 30 mA of AC type, suitable for detecting alternating-current earth leakage faults.
Advantages
The compact 4-pole construction reduces wiring complexity in distribution boards while delivering both earth-leakage protection and short-circuit/overload protection in one module. B-characteristic magnetic tripping ensures sensitive and rapid interruption of fault currents typical for general-purpose circuits. AC-type residual-current detection reliably senses alternating leakage currents, and the rated 20 A current capacity fits many branch-circuit applications in commercial and industrial environments.
Suitable for
Protection of three-phase circuits and distribution board branches
Earth-leakage protection in installations where AC-type detection is required
Zones where combined residual-current and overcurrent protection reduces component count
Key specifications
Poles: 4-pole configuration for three-phase systems
Rated current: 20 A
Tripping characteristic: B curve (magnetic instantaneous characteristic for short-circuit protection)
Residual current sensitivity: 30 mA
Residual current type: AC (detects alternating leakage currents)
Combined function: residual-current detection plus overcurrent (RCBO)
How to use
Install the device on a DIN rail inside the distribution board following the electrical installation standards and local regulations. Connect the three phase conductors and neutral to the respective terminals and route load circuits from the outgoing terminals. Ensure wiring, tightening torques and protective earth connections comply with national wiring rules. Test the residual-current function after installation using an appropriate testing procedure or a test button if provided by the panel design. Use the device within its rated current and specified characteristics to ensure correct selective protection.
Usage recommendations
Use this RCBO in three-phase systems where combined leakage and overcurrent protection is required. Verify compatibility with upstream protection and coordination in the distribution board, and perform periodic testing of residual-current operation as part of routine maintenance.

## FAQ

### How much does the Residual-current circuit breaker with overcurrent cost, and is it available for purchase?

The price is 94.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 13 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 14.07.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can Residual-current circuit breaker with overcurrent be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 Eti-Polam 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 Eti-Polam 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/12106434/67642970_large.webp