What this MCCB carries — and what it means for your panel
The Siemens SENTRON 3VA1132-5EF32-0HC0 is a 3-pole molded case circuit breaker (MCCB) rated 32 A at 40 °C, sized for line-protection duty in distribution panels. Its interrupting rating hits 187 kA at 240 V and 121 kA at 415 V — figures that govern fault-clearing capability at the service entrance or on a high-fault bus. The 70 mm depth and 76.2 mm width keep it within the standard MCCB footprint for DIN-rail or panel-mount integration.
Interrupting ratings and thermal derating — the real selection numbers
At 240 V this MCCB clears 187 kA; at 415 V it clears 121 kA; at 440 V it clears 75.6 kA; at 500 V and 690 V it clears 17 kA. These are the SCCR headroom values that determine whether the breaker coordinates with upstream protection and withstands a bolted fault without venting. The continuous current rating holds at 32 A from 40 °C through 50 °C, then derates to 31 A at 55 °C and 30 A at 70 °C — a mild slope that keeps the breaker usable in warm enclosures without oversizing.
Built-in auxiliary and trip functions
This MCCB ships with a shunt trip (STL) release and two HQ auxiliary switches integrated. The supplied basic switch is order code 3VA11325EF320AA0. No undervoltage release, no ground-fault monitoring, no communication module — it is a straight line-protection breaker with remote-trip and status-signal capability. Insulation voltage rated 800 V; power loss 10.6 W maximum at rated load.
Environmental range
Operating temperature spans -25 °C to 70 °C; storage from -40 °C to 80 °C. No derating below 40 °C, so cold-start installations in unheated shelters or outdoor cabinets are within spec.