# Siemens 3UN2131-1AN7 Thermistor Motor Protection Relay - 220/240V

The **Siemens 3UN2131-1AN7 Thermistor Motor Protection Relay** is a crucial component designed to safeguard motors against potential damage caused by thermal overload and electrical faults. This relay is widely used in industrial automation systems, ensuring the reliable operation of motors in various applications. It is a Type A relay operating at 220/240V, 50/60Hz, manufactured to meet the highest quality standards.

This **3UN2131-1AN7 relay** provides dependable protection, adhering to VDE 0660 and IEC 34-11 standards. This **Siemens** relay features a 1 normally open and 1 normally closed contact configuration, making it adaptable for diverse motor protection setups. With current ratings of 5A at 110V AC, 3A at 220V AC, 1.5A at 380V AC, and 2A at 24V DC, it offers a broad range of protection capabilities. It is designed for applications demanding B300 thermal and R300 mechanical durability.

Key Features:

-   **Thermistor Motor Protection:** Effectively protects motors from overheating and overload.
-   **Versatile Contact Configuration:** Features 1 NO and 1 NC contact for flexible application.
-   **Wide Voltage Compatibility:** Supports 220/240V power supplies with 50/60Hz.
-   **High Durability:** Designed for B300 thermal and R300 mechanical durability.
-   **Reliable Performance:** Ensures long-lasting and dependable motor protection.

Specifications:

The **3UN2131-1AN7** relay from Siemens offers precise current ratings suitable for various motor sizes. It operates efficiently within a specified voltage range, contributing to its adaptability. The relay's design meets rigorous safety standards, ensuring its reliability. Its compact design allows for easy integration into existing systems. The relay's robust construction guarantees consistent performance even in demanding industrial environments.

The **Siemens 3UN2131-1AN7** Thermistor Motor Protection Relay provides dependable protection. It is an essential component for any industrial or automation system. Contact us at [info@ramautomations.com](mailto:info@ramautomations.com).

## Details

- **Price:** 999.0 USD
- **Vendor:** Siemens
- **Type:** Industrial Automation > Motor Protection > Relays
- **Tags:** 3UN2131-1AN7, Industrial Automation, Motor Overload Protection, Motor Protection, Siemens, Thermistor Relay

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Used | 999.00 USD | In stock |

## Images

- Siemens 3UN2131-1AN7 Thermistor Motor Protection Relay - 220/240V-Ram Automations

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> Source: [Ram Automations](https://ramautomations.com/products/siemens-3un2131-1an7-motor-protection)
> Updated: 2026-10-03