Siemens SENTRON 3VA2110-7MS36-0HC0 — MCCB for motor and feeder protection
The Siemens SENTRON 3VA2110-7MS36-0HC0 is a 3-pole molded case circuit breaker (MCCB) designed for starter protection — meaning it's built to handle motor inrush and coordinate with contactors and overload relays in a motor control center. Rated 100 A continuously from 40 °C through 70 °C without derating, so it holds its full ampacity even in a warm panel. The adjustable thermal-magnetic trip unit covers 300 A to 1 500 A, giving you a wide band to set the instantaneous pickup for motor start or feeder fault coordination. Breaking capacity is the headline number here: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. That 330 kA at 240 V means it can safely interrupt a fault current up to 330 000 A at that voltage — critical for high-fault installations like transformer secondaries or large busway feeds. At 690 V the capacity drops to 3.7 kA, so confirm your available fault current at the installation voltage. This unit ships with a shunt trip release (STL) and two auxiliary switches (HQ) factory-installed. The shunt trip allows remote tripping from an E-stop or PLC output; the auxiliary switches provide status feedback to the control system. No undervoltage release, no ground-fault module, no communication function — it's a straightforward thermal-magnetic MCCB with remote trip capability.
Dimensions and panel fit
Footprint: 105 mm wide, 181 mm tall, 86 mm deep. That 105 mm width is a standard 3-pole MCCB form factor for DIN-rail or panel-mount installation. Verify the depth clearance for the shunt trip wiring and auxiliary switch harness — 86 mm plus bend radius for the control wires.