What it is and what it does
The Siemens 3VA1032-3ED32-0KC0 is a SENTRON molded case circuit breaker (MCCB) for line protection. It is a 3-pole unit rated 32 A at 40 °C, with a rated insulation voltage of 800 V. The breaking capacity reaches 75.6 kA at 240 V and 52.5 kA at 415 V, tapering to 7.5 kA at 690 V — numbers that matter when you're coordinating downstream devices and verifying SCCR at the panel label.
Ratings under the hood
Rated current 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. That means in a warm enclosure — say a panel near a furnace line or a crowded cabinet — you still get 30 A continuous without nuisance tripping, which is better than many compact MCCBs that drop harder above 50 °C. The breaker ships with a shunt trip (STL) and two auxiliary switches HQ built in — no separate add-on modules to snap on. If your safety circuit needs a remote trip signal or you're feeding a status back to a PLC, that's already wired inside the cover. Maximum power loss is 10.6 W — modest enough that you don't need to derate adjacent devices in a typical 600 mm wide panel, but worth checking if you're packing six of these in a row.
Panel fit and integration
Footprint is 70 mm deep, 76.2 mm wide, 130 mm tall — standard 3-pole MCCB envelope. Mounts on DIN rail or direct panel; the 3-inch width (76.2 mm) matches the SENTRON family busbar pitch, so you can feed it from a common bus without adapter links. Operating range spans -25 °C to +70 °C, storage from -40 °C to +80 °C. That covers most industrial environments without a heater or ventilation add-on.