# Residual-current circuit breaker Eti-Polam KZS-4M 4P 16A B 30mA type AC (002174004)

**URL:** https://aio.lv/en/product--eti-polam-002174004--10530489
**Data updated:** 2026-03-20 09:46 (EET)
**Category:** Power Sockets
**Manufacturer:** Eti-Polam
**Manufacturer code:** 002174004
**EAN:** 3838895551997
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 128.49 €
**Prices and availability valid until:** 2026-08-11 23:59
**Price without VAT (21%):** 106.19 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--eti-polam-002174004--10530489

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.07.2026 | free |
| Pickup points | 04.08.2026 | 1.89 EUR |
| Courier delivery to door | 04.08.2026 | 4.99 EUR |

## Summary description

Eti-Polam KZS-4M is a 4-pole residual-current + overcurrent protective device combining RCD and MCB functions. Rated current 16 A, B tripping characteristic, residual current sensitivity 30 mA, AC type detecting sinusoidal leakage. Designed for protection against electric shock and overload/short-circuit in three-phase electrical installations, suitable for residential and light commercial distribution boards.

## Long description

Eti-Polam KZS-4M 4P 16A B 30mA type AC is a combined residual-current device (RCD) and miniature circuit breaker (MCB) designed for three-phase electrical installations. This 4-pole unit provides overcurrent protection with a B-type tripping characteristic at a rated current of 16 A and detects sinusoidal alternating leakage currents with a residual sensitivity of 30 mA. The device is intended to reduce the risk of electric shock and to protect wiring and equipment from overloads and short circuits in residential and light commercial distribution boards.
Advantages
The combined RCD+MCB structure integrates earth-leakage detection and overcurrent protection in a single compact module, saving space in distribution panels and simplifying wiring. The B characteristic ensures timely tripping on moderate short-circuit and overload conditions typical in lighting and general-purpose circuits. AC-type residual current detection reliably senses pure sinusoidal leakage currents, making the device suitable for conventional installations without electronic leakage components. The four-pole design enables comprehensive protection in three-phase systems, including neutral disconnection, which helps maintain safety across all conductors.
Suitable for
Protection of three-phase circuits in residential distribution boards
Light commercial and small workshop installations
Feeder circuits supplying lighting, socket outlets and small motors
Applications requiring both overcurrent and earth-leakage protection in one device
Key specifications
Poles: 4-pole (three phases plus neutral)
Rated current: 16 A
Tripping characteristic: B curve (magnetic-electrical trip for moderate fault levels)
Residual current sensitivity: 30 mA
Residual current type: AC (detects sinusoidal alternating leakage)
Function: Combined residual-current device and miniature circuit breaker
Mounting: DIN-rail compatible housing for distribution boards
How to use
Install the Eti-Polam KZS-4M in the distribution board on a standard DIN rail, connecting the three phase conductors and neutral to the corresponding input and output terminals according to wiring diagrams and local regulations. Ensure the device is fitted upstream of the circuits it is intended to protect. Before commissioning, verify correct wiring polarity, torque terminal screws to manufacturer-recommended values, and test the device using a residual current tester or the built-in test mechanism where available. Replace or service the unit only when the supply is isolated and by qualified personnel.
Usage recommendations
Use this device where protection against electric shock and combined overload/short-circuit protection are required in three-phase installations. Verify compatibility with downstream equipment, avoid connecting loads with electronic leakage characteristics that require type A or type B residual current detection, and perform periodic testing of residual current operation as part of routine electrical maintenance.

## FAQ

### How much does the Residual-current breaker Eti-Polam KZS-4M 4P 16A 30mA cost, and is it available for purchase?

The price is 128.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 54 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 30.07.2026 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 breaker Eti-Polam KZS-4M 4P 16A 30mA 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/10530489/52668110_large.webp