The Siemens SENTRON 3VA1110-5EF36-0DC0 is a 3-pole molded case circuit breaker rated for 100 A continuous current (Iu) with a TM240 thermal-magnetic overcurrent release. It's built for line protection — main feeder or large branch circuit duty — not motor protection or ground-fault monitoring. The interrupting ratings are the headline: 187 kA at 240 VAC, 121 kA at 415 VAC, 75.6 kA at 440 VAC, and 17 kA at 690 VAC. That 187 kA figure at 240 V means it can clear a bolted fault on a high-capacity transformer secondary without the arc flash escalating upstream — a critical spec for panel SCCR compliance under UL 508A.
Thermal derating and panel fit
The 100 A rating holds flat from 40 °C through 50 °C ambient. Above that it steps down: 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, 90 A at 70 °C. If this breaker sits in a crowded enclosure near other heat sources, that 90 A floor at 70 °C is the real-world limit — plan the load accordingly. The case dimensions are 130 mm high, 76.2 mm wide, 70 mm deep. That 70 mm depth is shallow enough for most 200 mm-deep enclosures; the 76.2 mm width (three 25.4 mm pole pitches) is standard for 3-pole MCCBs in a SENTRON panelboard. IP40 on the front face means it's protected against tools and wires >1 mm, but not against water ingress — keep it inside a rated enclosure.
Auxiliary and undervoltage release
This variant ships with two HQ auxiliary switches (form C) and an undervoltage release (UVR) built in. The UVR is wired in series with the control voltage — if the control supply drops, the breaker trips. That's standard for emergency-stop or safety-shutdown circuits where loss of control power must open the main contacts. The auxiliary switches are rated for signal-level loads; they'll report breaker status back to a PLC input module. The integrated auxiliary trip order code is 3VA9608-0BB25 — that's the factory-fitted accessory, not a field-add kit. No communication module, no phase-failure detection, no ground-fault monitoring on this build.