# ABB REF543KM129AAAA Feeder Terminal Relay – Power Distribution

The **ABB REF543KM129AAAA Feeder Terminal Relay**, a premier product from ABB, is engineered for superior performance in distribution automation systems. This relay ensures efficient and reliable power distribution across various industrial applications. Its robust design and advanced features make it a critical component for maintaining operational integrity in demanding environments.

With a voltage range of **Uaux = 110-240VAC** and **Un = 100-120V**, the **REF543KM129AAAA** handles a wide range of electrical loads with precision. It also features **Uaux = 110-220VDC** and **In = 1/5A 0.2/1A**, ensuring optimal performance. Software version 1MRS110044-001 facilitates seamless integration with existing automation systems, allowing for easy monitoring and control of electrical distribution processes. Manufactured in Finland, this relay is built for durability and long-term reliability.

-   **Enhanced Reliability:** Designed for continuous operation in harsh industrial environments.
-   **Precision Performance:** Ensures accurate and efficient power distribution.
-   **Seamless Integration:** Software version 1MRS110044-001 for easy system integration.
-   **Wide Voltage Range:** Compatible with various electrical loads.
-   **Durable Construction:** Built to withstand demanding industrial conditions.

**Specifications** include voltage range of Uaux = 110-240VAC and Un = 100-120V. It also features Uaux = 110-220VDC and In = 1/5A 0.2/1A. This unit is designed to meet the highest standards of quality.

Invest in the **ABB REF543KM129AAAA Feeder Terminal Relay** for your distribution automation needs. Experience unparalleled efficiency and control, ensuring your industrial systems operate at peak performance. For any inquiries, please contact us at [info@ramautomations.com](mailto:info@ramautomations.com).

## Details

- **Price:** 999.0 USD
- **Vendor:** ABB
- **Type:** Industrial Automation > Relays > Feeder Terminal Relay
- **Tags:** 110-240VAC relay, ABB, automation relay, feeder terminal relay, industrial automation, power distribution, REF543KM129AAAA, voltage relay

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| REF543KM129AAAA / USED | 999.00 USD | In stock |

## Images

- ABB REF543KM129AAAA Feeder Terminal Relay – Power Distribution-Ram Automations

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> Source: [Ram Automations](https://ramautomations.com/products/abb-ref543km129aaaa-feeder-relay)
> Updated: 2026-10-01