# ETI ETITEC CM T23 275/20 4+0 Modular Surge Arrester

**URL:** https://aio.lv/en/product--eti-002440652--12444923
**Data updated:** 2026-05-18 02:43 (EEST)
**Category:** Power Extension Cords & Surge Protectors
**Manufacturer:** ETI
**Manufacturer code:** 002440652
**EAN:** 3838895918394
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

The ETI ETITEC CM T23 275/20 4+0 is a modular surge protection device designed for low-voltage electrical systems. This Type 2+3 arrester provides reliable protection against transient overvoltages, ensuring the safety of sensitive electronic equipment. Featuring a 4+0 configuration, it is suitable for TN-S and TT network systems. Its modular design allows for easy maintenance and replacement of protection modules, making it an essential component for residential and industrial installations.

## Long description

The ETI ETITEC CM T23 275/20 4+0 is a high-performance modular surge arrester engineered to safeguard low-voltage electrical installations from transient overvoltages. Designed as a combined Type 2 and Type 3 protection device, it effectively mitigates voltage spikes caused by atmospheric discharges or switching operations in the power grid. This device is specifically configured for 4+0 systems, ensuring comprehensive protection across all phases and neutral lines in TN-S and TT network architectures.
Advantages
The primary benefit of this modular surge arrester is its versatile dual-stage protection capability, which covers both coarse and fine surge suppression in a single compact unit. The modular design significantly simplifies maintenance, as individual protection modules can be replaced quickly without disconnecting the entire system or requiring complex rewiring. Its robust construction ensures long-term reliability and consistent performance in protecting sensitive electronic equipment, household appliances, and industrial control systems from unexpected electrical surges.
Suitable for
Residential electrical distribution boards
Commercial office building power systems
Industrial automation and control panels
Protection of sensitive electronic devices and appliances
TN-S and TT low-voltage network installations
When it may not be suitable
This device is not intended for use in high-voltage power transmission lines or as a primary lightning protection system for direct strikes on buildings. It should not be installed in environments exceeding its rated voltage or current capacity, as this may lead to device failure or safety hazards.
Key specifications
Protection class: Type 2 + Type 3
Configuration: 4+0
Maximum continuous operating voltage: 275V AC
Nominal discharge current: 20kA
Network compatibility: TN-S, TT
Mounting type: DIN rail
How to use
The device is designed for installation on a standard 35mm DIN rail within an electrical distribution cabinet. It must be connected in parallel to the power supply lines, ensuring that the connection cables are kept as short as possible to minimize inductive voltage drops during a surge event. Installation should be performed by a qualified electrician in accordance with local electrical safety regulations and the provided wiring diagram.
What to consider before purchase
Verify that your electrical network type is compatible with the 4+0 configuration.
Ensure the installation space on the DIN rail is sufficient for the module width.
Confirm that the operating voltage of your system does not exceed the 275V limit.
Check if your local regulations require additional upstream overcurrent protection.
Usage recommendations
Regularly inspect the status indicator on the front of the modules to ensure the device is operational. If the indicator changes color, the protection module has reached the end of its service life and must be replaced immediately to maintain system safety.

## 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 ETI 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 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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