Siemens SENTRON 3VA2010-6HM32-0AA0 — 100 A MCCB with Ground-Fault Summation
The Siemens SENTRON 3VA2010-6HM32-0AA0 is a 3-pole molded case circuit breaker rated for 100 A continuous current, designed for line protection in distribution panels and motor control centers. Its interrupting capacity reaches 242 kA at 240 V AC, stepping down to 187 kA at 415/440 V and 121 kA at 500 V — at 690 V it still holds 3 kA, covering most industrial voltage levels without needing a current-limiting upstream device. This breaker carries a ground-fault monitoring version using summation current formation on the L-conductor, meaning it measures vector sum of phase currents to detect leakage to earth — a common requirement on IT or TN-S systems where residual current devices aren't practical at these current levels. Thermal performance is flat across the operating range: full 100 A rating holds from 40 °C through 70 °C ambient, with no derating step until you exceed 70 °C. That simplifies panel sizing in warm enclosures or near heat sources.
Sourcing & Lifecycle — Current Production, No Obsolescence Concern
Availability is confirmed through independent distribution channels. Pricing and lead time are quoted per RFQ — the breaker is sourced to order with no supply constraints typical of active Siemens molded-case lines. Same part, different passport: a genuine Siemens unit regardless of which regional Siemens warehouse it ships from.
Physical Fit — Dimensions and Panel Integration
Measures 181 mm height, 105 mm width, and 86 mm depth. Mounts on DIN rail or backplate via integrated screw terminals. No undervoltage release or communication module is factory-installed on this variant (both are optional add-ons). The trip indicator is also absent — this is a basic thermal-magnetic line-protection breaker with ground-fault summation, not a metering or communicating unit.
Interrupting Capacity and Selectivity Coordination
The 242 kA interrupting rating at 240 V places this breaker in the high-fault-current class — suitable for service-entrance or main-breaker positions where available fault current exceeds 100 kA. At 415 V the 187 kA rating still covers most industrial transformer secondary faults without requiring a current-limiting fuse upstream. Minimum trip setting is 150 A, maximum 1 200 A. Initial value is 20 A.