What this MCCB is and what it does
The Siemens 3VA1032-3ED36-0CA0 is a SENTRON molded case circuit breaker (MCCB) sized for line protection in distribution panels. It carries a rated continuous current Iu of 32 A across three poles, with a TM210 thermal-magnetic overcurrent release that handles both overload and short-circuit trips without external power. The 800 V rated insulation voltage (Ui) gives it headroom for 480 V and 600 V class systems. Breaking capacity is specified at four voltage levels: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V. That spread tells you the part is rated for high-fault commercial and industrial panels where available fault current varies by system voltage — the 415 V figure is the one most often checked for European 400 V distribution.
Thermal derating and panel integration
The breaker holds its full 32 A rating from 40 °C through 50 °C ambient. Above that it derates: 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 — you need to account for that drop when sizing the load. The IP40 front protection means it's splash-safe on the operator face but not rated for washdown; keep it inside the enclosure, not on the gland plate. Dimensions are 130 mm height, 76.2 mm width, 70 mm depth. The 76.2 mm width is a standard 3-pole MCCB footprint — it fits the same DIN-rail or mounting-plate cutout as other SENTRON 3VA frame sizes, so a panel laid out for a 3VA1010 or 3VA1020 accepts this unit without drilling new holes.