Siemens SENTRON 3VA2110-5JP32-0BL0 — 100 A MCCB for line protection
The Siemens 3VA2110-5JP32-0BL0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel loading in warm enclosures. It's a 3-pole unit built for line protection, with a trip indicator and an undervoltage release (UVR) built in, plus auxiliary switch configuration: 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch. The interrupting ratings climb steeply at lower voltages — 187 kA at 240 V — and stay strong at 415/440 V at 121 kA, then taper to 75.6 kA at 500 V and 3.7 kA at 690 V. That 187 kA figure at 240 V means this breaker handles high-fault service-entrance duty where the available short-circuit current is extreme.
What the key ratings mean for fit
The 100 A continuous rating at 70 °C is the number that matters for a warm panel — many MCCBs start derating above 40 °C, but this one holds 100 A all the way to 70 °C, so it's a solid pick for a crowded switchboard or a hot environment like a steel mill or foundry. The 187 kA interrupting rating at 240 V is the headline — that's transformer-secondary or large-service capacity. For a 480 V distribution panel, the 121 kA at 440 V still gives serious headroom for a 100 A feeder. The unit includes a communication function, so it can talk to a higher-level system for monitoring or remote trip — useful for a BMS or SCADA integration where you want status without a separate auxiliary contact block.
Panel fit and integration
Dimensions are 86 mm deep, 105 mm wide, 181 mm tall — that's a standard 3-pole MCCB footprint for a 100 A frame, so it drops into most panelboards designed for SENTRON or similar form-factor breakers. The undervoltage release is built in (not a field-add kit), so if the control voltage drops, the breaker trips — good for safety circuits where a loss of control power should kill the load. No ground-fault monitoring on this variant — that's a separate version. If you need GF protection, look at the 3VA2... with ground-fault option.