Specifications General Product Type: Undervoltage Release (UVR) Part Number: 1SDA038312R1 Function: Automatically trips the breaker during undervoltage conditions Installation: Mounts as an accessory inside ABB Emax circuit breakers Electrical Characteristics Rated Operating Voltage: 220–240 V AC, 50/60 Hz Operation: When supply voltage falls below the trip threshold, the device instantly activates the breaker opening mechanism Coil Type: AC-operated undervoltage trip coil Compatibility Applicable Breakers: ABB Emax / SACE Emax series Typical Frame Sizes: E1, E2, E3, E4, E6, T8 Works with other control accessories such as shunt trip units and auxiliary contacts Functional Features Prevents closing of the breaker if voltage is not within the safe operating range Provides automatic protection during brownouts or voltage dips Suitable for integration with industrial control and safety systems Mechanical & Environmental Protection Class: Typically IP20 Operating Temperature Range: Approx. –20 °C to +55 °C Compact module designed for easy installation inside the breaker accessory compartment Compliance Designed according to IEC standards for circuit breaker accessories CE compliant RoHS compliant Typical Applications Industrial distribution panels Motor control centers Automation systems Emergency and safety shutdown circuits Any installation requiring automatic breaker tripping during undervoltage conditions