MCCB for line protection — 32 A, 3-pole, high interrupting capacity
The Siemens 3VA1032-4ED32-0JC0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It's a 3-pole unit rated 32 A at 40 °C, with an interrupting capacity of 121 kA at 240 V AC — that's the rating that tells you it can handle a serious fault without the arc climbing upstream. The 800 V rated insulation voltage gives you headroom on 480Y/277 V or 600 V systems, and the 70 mm depth keeps it compact on the DIN rail. It ships with a shunt trip (STL) release and two HQ auxiliary switches already fitted, so you don't have to order those separately.
Interrupting capacity — where the numbers matter
This breaker's interrupting capacity drops as voltage rises: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. For a 480 V panel, you're looking at roughly the 52.5 kA curve. That's enough for most industrial service-entrance or feeder applications, but if your available fault current sits above that at your system voltage, you'll need a current-limiting upstream device or a higher-rated frame. The 32 A rating holds steady from 40 °C through 50 °C (–), then derates slightly to 30 A at 70 °C — useful if the breaker lives in a hot enclosure near other dissipating gear.
Panel fit — dimensions and mounting
At 70 mm deep, 76.2 mm wide, and 130 mm tall (–), this 3-pole MCCB fits a standard DIN-rail footprint. The 76.2 mm width is a 3-module (3 x 25.4 mm) pitch, so it occupies three 18 mm positions on a 35 mm DIN rail. The shunt trip and auxiliary switches are factory-installed, which saves panel-builder wiring time but means you need to verify the auxiliary contact configuration matches your alarm or status scheme before committing the panel layout.