SENTRON 3VA1132-3EF36-0JA0 — 32 A MCCB with Shunt Trip
The Siemens 3VA1132-3EF36-0JA0 is a SENTRON molded case circuit breaker (MCCB) rated for 32 A continuous current (Iu) across a 3-pole configuration, designed for line protection in distribution panels and motor control centers. Its TM240 thermal-magnetic overcurrent release provides fixed thermal and magnetic trip settings, with a shunt trip (STL) auxiliary release for remote tripping — useful in emergency-stop or supervisory control circuits where a voltage trigger signal must open the breaker independently of the overcurrent condition. The interrupting ratings scale with system voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. At 415 V, that SCCR covers most industrial secondary-distribution fault levels without cascading upstream — a key selectivity consideration for panel builders coordinating downstream branch breakers. Current rating holds flat at 32 A up to 50 °C ambient, then derates to 30.72 A at 55 °C and 28.8 A at 70 °C. In a warm enclosure — say a non-ventilated panel near a furnace line — that derating curve is the number that governs the actual load you can protect, not the 32 A nameplate.
Lifecycle and Sourcing Reality
The breaker carries an integrated auxiliary trip accessory (order code 3VA9688-0BL32) that ships as a factory-fitted component on this variant. If you are replacing a unit in the field, confirm the shunt trip coil voltage matches your control circuit — the base breaker does not include undervoltage release or auxiliary contacts.
Integration and Mounting
The 3VA1132-3EF36-0JA0 measures 76.2 mm wide by 130 mm tall by 70 mm deep — a standard 3-pole MCCB footprint that fits Siemens SENTRON distribution panels and most DIN-rail-mount enclosures with the appropriate adapter. Front protection is IP40, so it is suited for dry indoor panels; no washdown rating. Rated insulation voltage is 800 V, and the mechanical endurance is listed at 15 000 operations — adequate for a main feeder or large branch breaker that cycles infrequently. The reference code per DIN EN 81346-2 is Q (switching device).