MCCB for line protection — 100 A, 121 kA SCCR
The Siemens SENTRON 3VA1010-4ED32-0AC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 100 A across ambient temperatures from 40 °C through 50 °C before any derating kicks in. At 55 °C it still holds 96 A, and at 70 °C it delivers 90 A — so for most panel environments below 50 °C, the full 100 A rating is available without headroom calculations. The interrupting ratings are the standout here — 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V.
TM210 release and auxiliary contacts
The overcurrent release is the TM210 thermal-magnetic type — fixed thermal pickup, magnetic trip adjustable across the standard range. It ships with 2 auxiliary switches, HQ (high-qualified) contacts rated for control-circuit reliability. This is a line-protection version (not motor-protection), so it's sized for feeder and distribution circuits rather than individual motor starts. The IP40 front protection is standard for panel-mounted breakers — installed in an enclosure, not open-air.
At 76.2 mm wide (roughly 3 inches), 130 mm tall, and 70 mm deep, this breaker fits standard panel-mount cutouts for 100 A frame MCCBs.