The interrupting ratings span 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 690 V, which means this MCCB can handle high-fault-current scenarios typical of industrial transformer secondaries or large motor control centers without cascading upstream.
Thermal derating and ambient conditions
The breaker carries its full 100 A rating from 40 °C through 50 °C ambient, then derates to 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C — a thermal curve that matters when the MCCB is enclosed in a non-ventilated panel near other heat sources.
Auxiliary and trip accessories
A voltage trigger is built in, and a mechanical trip indicator confirms the breaker has opened on fault — useful for quick visual checks during troubleshooting. The integrated auxiliary trip order code is 3VA9688-0BL32, which is the factory-fitted accessory; if that unit fails, order the same code for a drop-in replacement.
No undervoltage release, no phase-failure detection, no ground-fault monitoring, and no communication function are fitted on this variant — if those features are required for your BOM, a different 3VA order code in the same physical footprint should be selected.
Mechanical fit and panel integration
Dimensions are 130 mm height, 76.2 mm width, and 70 mm depth — the width matches the standard 3-pole MCCB footprint for Siemens 3VA frames, so it occupies the same DIN-rail or mounting-plate space as other 3VA 100 A units. Latching endurance is rated at 15 000 operations, which covers frequent switching in panel feeder duties but is not intended for motor-starting cycles.