The Siemens 3VA2010-7HM32-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current with a flat derating curve — it holds 100 A all the way from 40 °C to 70 °C ambient, so no headroom calculation needed for warm enclosures. Three poles, designed for line protection (cable/feeder protection, not motor start). Breaking capacity runs 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3 kA at 690 V. That 330 kA at 240 V is high — this breaker handles very high available fault currents on the secondary side of a distribution transformer without needing a current-limiting fuse upstream. Footprint is 86 mm deep by 105 mm wide by 181 mm tall — standard SENTRON 3VA form factor for a 100 A frame. Fits the same DIN-rail or screw-mount pattern as other 3VA breakers in this current class.
Lifecycle and Sourcing
Insulation voltage rated 800 V, power loss 7.7 W max at full load. Storage range -40 °C to 80 °C; operating range -25 °C to 70 °C. Ground-fault monitoring uses summation current formation on the L-conductor — built-in, no external module needed for that function.
Panel Fit and Integration
Mounts in the standard SENTRON panel footprint — 105 mm width means it occupies three 35 mm DIN modules plus a bit. No undervoltage release, no voltage trip, no communication function on this variant; it's a straight thermal-magnetic line-protection breaker with ground-fault summation. Trip indicator is not fitted on this order code. If you need local trip flagging, check the 3VA variants with the optional trip-indicator window. Adjustable thermal rating from 150 A minimum to 1 200 A maximum — the 100 A continuous rating is the fixed frame rating, not the adjustable range.