Siemens 3VA1132-3EF32-0CH0 — SENTRON MCCB for Line Protection
The Siemens 3VA1132-3EF32-0CH0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a continuous current rating of 32 A at 40 °C ambient, derating to 30 A at 70 °C, per the thermal curve. The 3-pole construction handles three-phase circuits up to 800 V rated insulation voltage. Breaking capacity is 75.6 kA at 240 V AC, 52.5 kA at 415 V, and 32 kA at 440 V — figures that govern selectivity coordination with downstream branch breakers. At 690 V the interrupting rating drops to 11.9 kA, so verify available fault current at the installation point. This MCCB includes an undervoltage release (UVR) and is pre-configured with two auxiliary switches plus one trip alarm switch (HQ). The trip indicator confirms the breaker has opened on fault, useful during troubleshooting without removing the cover.
Integration & Mounting
Panel footprint: 130 mm height, 76.2 mm width, 70 mm depth. The 3-pole MCCB mounts on a DIN rail or directly to a backplate via the fixed lugs. Power loss is 13.1 W maximum — factor this into enclosure thermal calculations for derating.
