The Siemens SENTRON 3VA1132-6EF32-0BH0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 32 A at 40 °C ambient. Its interrupting capacity reaches 220 kA at 240 V, which drops to 154 kA at 415 V and 121 kA at 440 V — figures that matter when coordinating downstream devices in a high-fault panel. The breaker includes an undervoltage release (UVR) and a trip indicator, plus two auxiliary switches and one trip alarm switch (HQ) for status feedback to a PLC or annunciator.
Interrupting capacity and selectivity
At 240 V the 220 kA SCCR is the headline number, but the real-world selectivity window is at 415 V (154 kA) and 440 V (121 kA). At 500 V and 690 V the rating settles to 17 kA — still adequate for most 480Y/277 V distribution, but the drop tells you this breaker is optimized for low-voltage, high-fault applications rather than 690 V motor circuits. The rated insulation voltage is 800 V, so the internal clearances support the higher-voltage installations even if the interrupting curve is lower there.
Thermal derating and operating range
The breaker holds its full 32 A rating from 40 °C through 50 °C. At 55 °C it derates to 31 A, and at 70 °C it reaches 30 A. That's a shallow derating curve — only 2 A lost over a 30 °C rise — which means the thermal-magnetic trip assembly is well-ventilated for a 70 mm deep package. Operating ambient spans -25 °C to 70 °C; storage extends from -40 °C to 80 °C. Maximum power loss is 13.1 W, a figure to account for in enclosed panel heat budgets.
Panel fit and wiring
Dimensions are 130 mm height, 76.2 mm width, and 70 mm depth. The 3-pole footprint matches the standard SENTRON 3VA mounting pattern — it snaps onto a DIN rail or bolts to a mounting plate. The undervoltage release (UVR) is factory-fitted; verify control voltage compatibility before energizing. The auxiliary switch block (2 aux + 1 trip alarm) provides dry contacts for remote status without additional interface relays.