SENTRON 3VA1225-6GF42-0DC0 — 250 A 4-Pole MCCB, Line Protection
The Siemens 3VA1225-6GF42-0DC0 is a SENTRON molded case circuit breaker (MCCB) rated for 250 A continuous current across four poles, configured for line protection with a TM240 thermal-magnetic release. It carries an undervoltage release (UVR) and two HQ auxiliary switches as standard, plus an integrated auxiliary trip (3VA9608-0BB25). Interrupting ratings span 220 kA at 240 V AC, 154 kA at 415 V, 36 kA at 440 V, and 17 kA at 690 V — so it handles high-fault utility feeds at lower voltages while maintaining selectivity on 690 V industrial networks. The 250 A frame is thermally stable up to 50 °C (full rating), then derates to 223 A at 70 °C; plan your enclosure ventilation if ambient exceeds 50 °C.
Footprint & Panel Fit
Dimensions are 70 mm deep, 140 mm wide, 158 mm high — a standard 4-pole MCCB footprint that drops into most SENTRON distribution panels and switchboard cubicles without re-drilling. Front protection is IP40, so it suits indoor panel environments; no washdown rating on this variant.
Release & Accessory Configuration
The TM240 overcurrent release is a thermal-magnetic type, fixed at 250 A, with no voltage-trigger or phase-failure detection on this variant. The undervoltage release (UVR) drops the breaker on loss of control voltage — common for emergency-stop circuits and safety disconnects. Two HQ auxiliary switches (form C) provide status feedback to the PLC or SCADA.