Rated for the wet well — what the 100 A and 75.6 kA actually mean
The Siemens SENTRON 3VA1010-3ED32-0CA0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current at 40 °C, with a TM210 thermal-magnetic overcurrent release. That 100 A holds flat through 50 °C — only starts to derate at 55 °C (96 A), 60 °C (94 A), 65 °C (92 A), and 70 °C (90 A). In a non-climate-controlled pump station panel that hits 55 °C in summer, you still get 96 A of headroom; no need to oversize the frame. Breaking capacity is where this MCCB earns its place in a feeder: 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 52.5 kA at 415 V covers most North American 480Y/277 V and international 400 V distribution panels without needing a current-limiting upstream fuse. For a 690 V drive input, the 7.5 kA figure still clears most transformer-secondary faults, but verify your available fault current against that number.
Undervoltage release — why it matters for a lift station
In a wastewater lift station, that prevents automatic restart after a brownout that could hammer pumps back online against a closed discharge valve or a flooded wet well. The UVR is wired separately from the main power path, so it stays functional even if one phase is lost.
Panel fit — dimensions and IP40 front
Footprint is 76.2 mm wide (roughly 3 inches — fits a standard 3-pole MCCB slot in most distribution panels), 130 mm tall, 70 mm deep.
What the TM210 release tells you
The TM210 is a thermal-magnetic release — thermal element handles overload protection (inverse-time curve), magnetic element handles short-circuit (instantaneous). The '210' designation means the magnetic pickup is fixed at 10× In (1000 A for this 100 A frame). That's a standard motor-circuit pickup; for feeder applications where you need higher short-circuit withstand before the upstream device clears, the 10× In setting is typical. No electronic adjustment or communication — this is a straightforward thermal-magnetic breaker, not a power metering device.