Siemens – 5ST3044 – Undervoltage Release (110 V DC) for 5SL4/5SY/5SP/5SU1

The Siemens 5ST3044 is a DC undervoltage release designed to automatically trip compatible miniature circuit breakers (like 5SL4, 5SY, 5SP RCBO, and 5SU1) if supply voltage drops below the required threshold. Mounted via two screw terminals and responsive to a 110 V DC coil, it’s ideal for safety and reliability in control circuits.