Line protection MCCB with 187 kA interrupting capacity
The Siemens SENTRON 3VA1110-5EF36-0AC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying 100 A continuous current at up to 50 °C ambient with no derating — at 55 °C it still holds 96 A, and at 70 °C it delivers 90 A, so the full 100 A rating is usable across most panel environments without a temperature penalty. Its interrupting ratings are the headline: 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V — figures that place it in the high-breaking-capacity class for industrial distribution where fault currents can exceed 100 kA on the secondary side of a large transformer. The TM240 thermal-magnetic release is fixed, not adjustable, so the long-time pickup and instantaneous trip are set at the factory; there is no undervoltage release, no shunt trip, no ground-fault monitoring, and no communication module on this variant — it is a straight thermal-magnetic breaker for basic feeder or branch protection.
Panel fit and auxiliary contacts
The 3VA1110-5EF36-0AC0 measures 76.2 mm wide by 130 mm tall by 70 mm deep — a standard 3-pole MCCB footprint that fits Siemens SENTRON mounting plates and most DIN-rail adapters. It ships with 2 auxiliary switches (HQ type) pre-installed, giving a normally-open and normally-closed contact for status feedback to a PLC or remote indication — no separate auxiliary block to order for basic signaling. Front protection is IP40, meaning tools or fingers cannot reach live parts from the front, but the sides and back are open for heat dissipation inside the enclosure — standard for panel-mounted MCCBs.
Lifecycle and compliance posture
Rated insulation voltage is 800 V, and the latching endurance is 15,000 operations. Storage temperature range of -40 °C to 80 °C and operating range of -25 °C to 70 °C cover most indoor and conditioned outdoor installations; the -25 °C minimum means it can sit in an unheated electrical room in cold climates without issue.