What it is and what it does
The Siemens SENTRON 3VM1132-4ED22-0AA0 is a 2-pole molded case circuit breaker (MCCB) designed for line protection. With a continuous current rating of 32 A at 40 °C and a short-circuit interrupting capacity of 121 kA at 240 V AC, it handles high-fault-current scenarios in distribution panels. The TM210 thermal-magnetic release provides fixed overload and short-circuit protection curves. The 121 kA interrupting rating at 240 V AC means this breaker can safely clear a fault current up to that magnitude without rupturing or welding contacts, which is critical for maintaining selectivity in a panel feeding downstream branch circuits. At 415 V AC the interrupting rating is 76 kA, still ample for most industrial service-entrance applications.
Thermal derating and operating range
Rated current holds at 32 A from 40 °C through 50 °C ambient, then gradually declines: 31 A at 55 °C, 31 A at 60 °C, 30 A at 65 °C, and 30 A at 70 °C. The maximum operating temperature is 70 °C; storage range spans -40 °C to 80 °C. In a warm enclosure with other heat sources, expect to apply the 55 °C derating figure if the internal ambient exceeds 50 °C.
Physical fit and panel integration
The breaker occupies 50.8 mm width (2 in) per pole — a 2-pole unit fits a 2-inch wide DIN-rail slot. Depth is 70 mm (2.76 in), height 130 mm (5.12 in). Front-face protection is IP40, meaning tools or fingers won't contact live parts from the front, but the sides and back are not sealed against dust ingress. No trip indicator, no undervoltage release, no ground-fault monitoring — this is a basic line-protection device with the TM210 release only.
Lifecycle and sourcing posture
The manufacturer lists this part as current production — no end-of-life notice or last-time-buy date on record. For BOM freeze or line-down replacement, the 3VM1132-4ED22-0AA0 is sourced to order through independent distribution channels against an RFQ. Availability and current pricing are confirmed at quote time.