What this MCCB carries — and what it doesn't
The Siemens SENTRON 3VA1032-4ED32-0BH0 is a 3-pole molded case circuit breaker rated for 32 A continuous current at 40 °C, with a TM210 thermal-magnetic overcurrent release. The 121 kA breaking capacity at 240 V AC means it can interrupt fault currents up to that level without upstream cascading — a figure that drops to 75.6 kA at 415 V and 11.9 kA at 690 V, so selectivity studies need to reference the actual line voltage. The TM210 release is a fixed thermal-magnetic type — no electronic adjustment, no communication module, no ground-fault monitoring. What you get is a straight line-protection breaker with an undervoltage release (UVR) and a 2-auxiliary + 1 trip-alarm switch block.
Thermal derating — the real ampacity
The 32 A rating holds flat from 40 °C through 50 °C. Above that it steps down: 30.72 A at 55 °C, 30.08 A at 60 °C, 29.44 A at 65 °C, and 28.8 A at 70 °C. If the panel ambient runs hot — say a sealed enclosure near a furnace line — the continuous load must be capped at the derated value, not the nameplate 32 A. The operating range spans -25 °C to 70 °C, with storage from -40 °C to 80 °C.
Footprint and panel fit
The breaker measures 76.2 mm wide, 130 mm tall, and 70 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or screw-mount panel layouts. IP40 on the front means it's protected against tools and solid objects over 1 mm, but not against water ingress; keep it inside a rated enclosure. The auxiliary trip accessory order code is 3VA9608-0BB11 if the BOM needs a spare.