Line Protection MCCB with TM210 Release
The Siemens SENTRON 3VA1010-3ED42-0KH0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 100 A. The TM210 thermal-magnetic release provides overload and short-circuit protection without the complexity of an electronic trip — a straightforward choice for standard distribution panels where coordination studies are already done. Interrupting capacity is 75.6 kA at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V — enough headroom for most low-voltage switchboards fed by a transformer in the 500–1000 kVA range. At 690 V the rating drops to 7.5 kA, so confirm the fault level if this breaker lands on a 690 V bus. The breaker includes a shunt trip release (STL) for remote opening, plus 2 auxiliary switches and 1 trip alarm switch (HQ configuration) — enough feedback for a PLC or status lamp without an add-on module. No undervoltage release, no ground-fault monitoring, no communication function: this is a pure power breaker, not a smart meter.
Thermal Derating and Panel Fit
Rated 100 A flat from 40 °C to 50 °C ambient; at 55 °C it derates to 96 A, at 60 °C to 94 A, at 65 °C to 92 A, and at 70 °C to 90 A. If the panel runs hot — say near a transformer or in a non-climate-controlled enclosure — size the upstream conductor and downstream bus for the derated value, not the nameplate 100 A. Dimensions: 101.6 mm wide, 130 mm high, 70 mm deep. The 101.6 mm width is a standard 4-pole MCCB footprint — it fits a 4-module cutout in most Siemens SENTRON distribution panels. Front IP40 rating means it's protected against tools and small wires but not against water ingress; keep it inside a cabinet. The integrated auxiliary trip is order code 3VA9688-0BL33 — that's the factory-fitted shunt trip coil. If you're replacing an existing breaker, verify the coil voltage matches your control circuit; the base breaker does not include a undervoltage release.