3VA1132-5EF32-0AB0 — 32 A MCCB with 187 kA interrupting capacity
The Siemens SENTRON 3VA1132-5EF32-0AB0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a rated continuous current Iu of 32 A and a rated insulation voltage Ui of 800 V. Its interrupting capacity hits 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V — so at typical 400 V distribution levels it clears fault currents up to 121 kA without cascading upstream. The overcurrent release is a TM240 thermal-magnetic type, adjustable response time tr max. 1 s, and the auxiliary contact version is 2 auxiliary switches HP. Latching endurance is rated at 15 000 operations.
What the ratings mean for the panel
The 32 A continuous rating holds flat from 40 °C through 50 °C, then derates to 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 — so in a warm enclosure near the top of the operating range (−25 °C to 70 °C), you lose roughly 10 % of the ampacity. The 187 kA at 240 V and 121 kA at 415 V mean this breaker can be applied on high-fault panels without needing a current-limiting fuse upstream, as long as the available fault current stays under those numbers. The IP40 front protection keeps dust out of the breaker face; the rest of the body is open to the panel environment.