ABB 1SDA073700R1 YU E1.2..E6.2-XT7-XT7M 220-240 VAC/DC Undervoltage Release

The ABB 1SDA073700R1 YU E1.2..E6.2-XT7-XT7M 220-240 VAC/DC is a factory-fitted undervoltage release designed for the SACE Emax2 series air circuit breakers (E1.2 through E6.2) and the Tmax XT7/XT7M moulded case circuit breakers. Operating across a rated voltage of 220–240 V AC/DC, this accessory automatically trips the breaker when supply voltage drops below a preset threshold, protecting downstream equipment from damage caused by sustained undervoltage conditions. Compact in form at 105 mm × 55 mm × 135 mm and weighing only 0.12 kg, the YU E1.2..E6.2-XT7-XT7M 220-240 VAC/DC integrates directly into the circuit breaker without requiring additional external wiring blocks.

Technical Specifications

Certifications & Standards

• CE: Conforms to EU safety, health, and environmental protection requirements
• RoHS: Compliant with EU Directive 2011/65/EU on restriction of hazardous substances
• Amendment 2015/863: Updated RoHS substance restrictions under EU Directive 2015/863
• REACH: Compliant with EU REACH regulation on chemical substance safety
• ATEX: Approved for use in potentially explosive atmospheres per ATEX directive
• VDE: Tested and certified to VDE electrical safety standards (Germany)
• WEEE: Registered under EU Waste Electrical and Electronic Equipment Directive for responsible disposal

Applications & Use Cases

• Protection of motors, transformers, and sensitive loads against sustained undervoltage events in industrial power distribution systems
• Automatic tripping of SACE Emax2 and Tmax XT7/XT7M breakers when bus voltage falls below threshold in main and tie switchgear panels
• Integration into automatic transfer switch (ATS) schemes to prevent equipment re-energisation under low-voltage conditions
• Deployment in hazardous area control panels where ATEX-rated components are mandatory
• Control panel and MCC (Motor Control Centre) applications requiring IEC-compliant undervoltage protection accessories