What this MCCB is and what it does
The Siemens 3VA2010-6HN32-0CH0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection — the main disconnect and fault interrupter in a distribution panel, motor control center, or industrial switchboard. It carries 100 A continuously across all ambient temperatures from 40 °C up to 70 °C, so no derating curve to chase for typical panel environments.
Breaking capacity — what the numbers mean for your fault level
This 3-pole MCCB interrupts 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V. The 242 kA at 240 V is the headline figure — it handles the extreme fault currents possible on a 240 V secondary of a large transformer. At 415 V the 187 kA still covers most industrial service-entrance requirements. The steep drop to 3 kA at 690 V means this breaker is not intended for 690 V main feeders; it belongs on a 240–500 V distribution bus.
Built-in auxiliaries and releases — what ships on the breaker
Factory-fitted with 2 auxiliary switches plus 1 trip alarm switch (HQ type), and an undervoltage release (UVR). The UVR trips the breaker when control voltage drops — standard for emergency-stop and undervoltage protection schemes. The basic switch mechanism is 3VA20106HN320AA0. No ground-fault module, no communication function, no voltage-trip feature. If you need shunt trip or GF protection, this isn't the variant.
Panel fit — dimensions and environment
Footprint is 105 mm wide × 181 mm high × 86 mm deep. That's 4.13 × 7.13 × 3.39 inches. Mounts on a DIN rail or direct panel. Operating range is -25 °C to 70 °C; storage from -40 °C to 80 °C. Max power loss is 16 W — negligible for panel thermal budgeting, but worth noting if you pack breakers tightly.