The Siemens SENTRON 3VA1132-5EF32-0DH0 is a 3-pole molded case circuit breaker (MCCB) rated 32 A at 40 °C, designed for line protection. Its headline breaking capacity is 187 kA at 240 V — that's the fault current it can safely interrupt without upstream damage, sized for high-available-fault-current panels where a standard MCCB would fail closed.
Breaking capacity across voltages
The 187 kA at 240 V drops to 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. That steep derating above 440 V means this breaker is best matched to 240 V or 400 V-class distribution where the available fault current is high; at 690 V the 17 kA limit may force a larger-frame breaker upstream.
Thermal derating and ambient limits
Rated 32 A from 40 °C through 50 °C, then derates to 31 A at 55–60 °C and 30 A at 65–70 °C. The operating ambient range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. For a panel running warm — say 55 °C inside — plan on 31 A continuous, not the full 32.
Auxiliary and release configuration
This variant includes an undervoltage release (UVR) and is fitted with 2 auxiliary switches plus 1 trip alarm switch (HQ). The UVR drops the breaker when control voltage falls below the dropout threshold — common for emergency-stop circuits or undervoltage protection on motor feeds. The trip alarm signals a fault condition separately from the aux position, useful for remote status monitoring.
Physical fit
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth. The 3-pole width (76.2 mm) is standard for this frame size; it mounts on a DIN rail or panel base plate. Verify the existing panel cutout or DIN-rail spacing — the 70 mm depth includes the handle and rear arc chamber, so leave clearance for wiring and the undervoltage release module.