Siemens 3VA1132-5EF36-0HH0 — 32 A SENTRON MCCB with 187 kA Interrupting Capacity
The Siemens 3VA1132-5EF36-0HH0 is a 3-pole SENTRON molded case circuit breaker rated for 32 A continuous current at 40 °C ambient, with a breaking capacity of 187 kA at 240 VAC — that's the short-circuit current it can safely interrupt without welding contacts or rupturing the case, which matters when you're coordinating downstream feeders in a high-fault panel. Breaking capacity drops as voltage rises: 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500 V and 690 V. For a 400 V distribution board, the 121 kA figure is the one to use in your selectivity study. Thermal rating holds at 32 A from 40 °C through 50 °C, then derates to 31 A at 55–60 °C and 30 A at 65–70 °C. If the panel ambient runs hot, the 30 A ceiling at 70 °C is your real limit. Rated insulation voltage is 800 V, so the breaker is suitable for 690 V line-to-line systems with margin. The design is line protection (not motor protection), meaning it's intended for feeder and distribution duty, not overload protection of a motor circuit.
Built-in Accessories and Panel Fit
This variant ships with a shunt trip release (STL) for remote tripping, plus two auxiliary switches and one trip alarm switch (HQ configuration). That's enough status feedback for a PLC input card without adding external relays. Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The storage limit governs shipping and warehouse conditions, not running duty. Maximum power loss is 10.6 W — relevant for thermal budgeting inside a sealed enclosure. No undervoltage release, no ground-fault monitoring, no communication function on this order code.