ABB 1SDA066400R1 UVR-C XT1..XT4 F/P 380-440 Vac Undervoltage Release for Tmax XT Series Circuit Breakers

The ABB 1SDA066400R1 UVR-C XT1..XT4 F/P 380-440 Vac is an undervoltage release accessory designed for use with ABB Tmax XT series moulded case circuit breakers (XT1 through XT4) in both fixed and plug-in mounting configurations. Operating at a rated voltage of 380–440 V AC, the UVR-C XT1..XT4 F/P 380-440 Vac automatically trips the circuit breaker when the supply voltage drops below a defined threshold, protecting connected equipment and preventing uncontrolled restarts after power restoration. Compact and lightweight at just 0.143 kg, this release is engineered for demanding industrial and commercial control panel applications.

Technical Specifications

Certifications & Standards

• IEC 60947-2: Compliant with the international standard for low-voltage switchgear and controlgear — circuit breakers
• UL 489: Listed to the UL standard for molded-case circuit breakers, molded-case switches, and circuit breaker enclosures
• CE: Conforms to applicable European Union directives for the CE marking
• RoHS: Compliant with the Restriction of Hazardous Substances Directive, limiting the use of specified hazardous materials
• REACH: Compliant with EU REACH regulation (Registration, Evaluation, Authorisation and Restriction of Chemicals)
• EU Directive 2011/65/EU & Amendment 2015/863: Meets RoHS recast requirements including the updated substance restrictions under Amendment 2015/863
• WEEE: Compliant with the Waste Electrical and Electronic Equipment Directive for responsible end-of-life disposal

Applications & Use Cases

• Automatic tripping of Tmax XT1–XT4 circuit breakers on supply voltage loss or undervoltage conditions
• Motor protection panels where uncontrolled restart after voltage dip must be prevented
• Industrial automation control cabinets requiring IEC 60947-2 compliant protective accessories
• Commercial and industrial power distribution boards with fixed or plug-in breaker installations
• Machine safety circuits demanding certified undervoltage protection per UL489 and CE standards