The Siemens SENTRON 3VM9908-0BB15 is an undervoltage release accessory designed for 3VM molded-case circuit breakers up to 630 A.
The 4 kV surge voltage resistance confirms it will withstand the 4 kV impulse test required for category III equipment at 230/400 V mains. Power consumption max 2.5 W DC — the control transformer or power supply feeding this release must be sized to cover that continuous draw. Wire stripping length 10 mm (0.4 in) for the control terminals; standard ferrule or solid copper, no special crimp tool needed.
