What the ratings mean for fit
The Siemens 3VA2010-5KP32-0CL0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current at 40 °C through 50 °C, with a linear derating curve down to 85 A at 70 °C. That 100 A frame is the one you size the feeder for — the breaker holds that rating across the typical panel ambient range, so no headroom padding needed unless the enclosure runs above 50 °C. Breaking capacity is the headline number here: 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 3.4 kA at 690 V. At 415 V, that 121 kA rating puts it well above typical utility fault levels for most industrial services — you're not coordination-limited by the main breaker on a 2 MVA transformer secondary. The steep drop to 3.4 kA at 690 V means this is not a 690 V main; it's a 240–500 V distribution breaker. The ETU850 electronic trip unit provides adjustable long-time, short-time, instantaneous, and ground-fault protection curves. Communication function is integrated, so it can report status and trip events to a higher-level control system — useful for a plant-wide power monitoring scheme where you want to know which feeder cleared before the electrician walks the line.
Lifecycle and sourcing reality
The auxiliary contact configuration is 2 auxiliary switches plus 1 trip alarm switch plus 1 electrical alarm switch HQ. The undervoltage release (UVR) is factory-fitted as design of the auxiliary release, part number 3VA9608-0BB24. If your panel schematic calls for a shunt trip instead, this variant won't drop in without swapping the release module.
Panel integration and mounting
Dimensions: 105 mm wide, 181 mm high, 86 mm deep. That 105 mm width is the standard 3-pole MCCB footprint for this SENTRON frame size — it occupies three 35 mm DIN module positions if mounted on a DIN rail, or bolts directly to a mounting plate. The 86 mm depth leaves clearance for rear-connected busbars or a cable duct behind the panel backplate. Maximum power loss is 16 W at rated current. That's low enough that forced ventilation is not required in a standard IP54 enclosure, but if you're packing multiple breakers in a sealed cabinet, sum the losses and check the temperature rise against the 70 °C operating maximum.