Siemens 3VA1150-3EF32-0JA0 — 50 A MCCB with Shunt Trip, Line Protection
The Siemens 3VA1150-3EF32-0JA0 is a SENTRON 3VA1 molded case circuit breaker rated for 50 A continuous current (Iu) at 40 °C, with a 3-pole configuration and a TM240 thermal-magnetic overcurrent release. It carries a shunt trip (STL) auxiliary release, making it suited for remote-trip applications in distribution panels or motor control centers where emergency-off or undervoltage-coordination is required. The interrupting ratings are 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V — covering most low-voltage fault-current scenarios across North American and IEC installations. The 3-pole frame with line-protection firmware (no ground-fault, no communication) keeps it a straightforward, high-SCCR choice for feeder or branch-circuit duty. Rated insulation voltage is 800 V, and the breaker is rated for 15,000 latching endurance cycles. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Front protection is IP40, so it's suitable for enclosed panel mounting — not washdown environments.
Sourcing & Lifecycle
The part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time. For a critical-spare holding or a BOM freeze, this is a stable line item — no imminent PCN or LTB to track.
Integration & Mounting
The 3VA1150-3EF32-0JA0 measures 130 mm high, 76.2 mm wide, and 70 mm deep. It mounts on a DIN rail or panel-mount via the SENTRON 3VA1 base. The 3-pole footprint fits standard distribution board cutouts; verify the shunt trip wiring (3VA9688-0BL32 integrated auxiliary trip) before energizing — polarity on the STL coil matters. No auxiliary contact version is fitted, and there is no communication function or phase-failure detection — this is a pure line-protection breaker with a remote-trip shunt. The TM240 release is factory-set; field adjustment is via the front dial if the variant supports it (check the specific 3VA1 manual for the TM240 adjustment range).