What it is and what the ratings mean for fit
The Siemens 3VA2010-5JQ36-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current, 3-pole, designed for line protection. The 187 kA interrupting capacity at 240 V means it can safely clear a fault up to that level without upstream damage — critical for high-fault service entrances or transformer secondaries. At 415 V and 440 V it still holds 121 kA, dropping to 75.6 kA at 500 V and 3 kA at 690 V, so the voltage class of your distribution panel directly governs which breaking capacity applies.
Panel integration and dimensions
The 3VA2010-5JQ36-0AA0 measures 86 mm deep by 105 mm wide by 181 mm tall. That 105 mm width on a 3-pole 100 A frame means it occupies roughly four 27 mm DIN positions — useful when laying out a multi-breaker sub-feed panel or retrofitting into an existing SENTRON switchboard. Maximum power loss is 13.5 W, so ventilation in a sealed enclosure should account for that thermal load at rated current.
Ground-fault and communication capability
This breaker includes ground-fault monitoring via summation current formation on the L-conductor — it measures vector sum of phase currents, not a separate neutral CT, which simplifies wiring in 3-wire delta or resistance-grounded systems. Communication function is present, supporting integration into a higher-level monitoring or energy management system. Designed for line protection duty, not motor or feeder protection.