ABB 1SDA066430R1 AUX-SA-C 1S51 250Vac/dc XT2-XT4 W 1NO+1NC 250V AC/DC Withdrawable Auxiliary Contact Signaling Contact for Circuit Breaker

The ABB AUX-SA-C 1S51 250Vac/dc XT2-XT4 W (SKU: 1SDA066430R1) is a withdrawable auxiliary and signaling contact block designed for use with ABB XT2 and XT4 series moulded case circuit breakers. This compact accessory — weighing just 85 g with dimensions of 110 × 140 × 60 mm — enables reliable status signaling and auxiliary switching at up to 250V AC/DC in demanding industrial control panel applications. The AUX-SA-C 1S51 250Vac/dc XT2-XT4 W is the preferred choice for engineers integrating circuit breaker status feedback into automation and protection systems.

Technical Specifications

Certifications & Standards

• CE: Compliant with European CE marking requirements for electrical components
• RoHS: Restriction of Hazardous Substances — compliant with EU Directive 2011/65/EU
• REACH: Compliant with EU REACH regulation for chemical safety
• EU Directive 2011/65/EU & Amendment 2015/863: RoHS recast compliance confirmed as of July 22, 2019
• IEC 60947-2 / UL 489: Meets international and North American standards for circuit breaker accessories
• IEC 60947: Compliant with the IEC standard for low-voltage switchgear and controlgear
• WEEE: Registered under the Waste Electrical and Electronic Equipment Directive for responsible end-of-life disposal

Applications & Use Cases

• Status signaling and feedback integration in industrial control panels
• Auxiliary switching for PLC inputs and SCADA monitoring systems
• Motor protection and distribution panel automation using ABB XT2 or XT4 circuit breakers
• Building automation and facility management electrical distribution boards
• Machine control systems requiring breaker open/closed status indication