What it is and what it does
The Siemens 3VA1010-2ED42-0JH0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current at 40 °C, with a 4-pole configuration and a TM210 thermal-magnetic overcurrent release. It's built for line protection — meaning it sits at the feeder or main distribution point in a panel, protecting downstream cables and equipment from overloads and short circuits. The interrupting ratings climb to 52.5 kA at 240 V and 32 kA at 415 V, so it handles high-fault utility feeds without needing an upstream current-limiting fuse.
Ratings that matter for fit
The 100 A rating holds flat from 40 °C up to 50 °C — no derating needed in a typical warm panel. Above that it drops gradually: 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C. If your enclosure runs hot, size the breaker for the actual ambient, not the nameplate. The TM210 release is a fixed thermal-magnetic trip unit — no interchangeable trip blocks, so the breaker's overload curve is set at the factory. The auxiliary contact package includes 2 auxiliary switches plus 1 trip alarm switch (HQ type), giving you remote status and alarm feedback without an add-on module.
Mounting and panel fit
This MCCB measures 70 mm deep, 101.6 mm wide, and 130 mm high. The 101.6 mm width is a standard 4-pole footprint — it will drop into the same mounting holes as other SENTRON 3VA1 4-pole breakers. The front face carries an IP40 rating, so it's protected against tools and wires larger than 1 mm, but it's not sealed against moisture or dust ingress inside the enclosure. The shunt trip (STL) release is built in — order code 3VA9688-0BL32 for the integrated auxiliary trip — so you can remotely trip the breaker from a safety circuit or emergency stop.