This Siemens SENTRON 3VA1196-5EF46-0AA0 is a 4-pole molded case circuit breaker (MCCB) built for line protection. It carries a TM240 thermal-magnetic release and is rated for 16 A continuous from 40 °C up to 55 °C — at 60 °C it derates to 15 A, so if you're packing this into a hot panel near a drive or transformer, that's the number to watch. The breaking capacity is where this breaker earns its keep: 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, and still 17 kA up at 500 and 690 V. That kind of headroom means it handles high-fault utility feeds or large transformer secondaries without worrying about cascading upstream — a real advantage when you're coordinating a distribution board. It snaps onto a DIN rail and measures 101.6 mm wide by 130 mm tall by 70 mm deep — four-pole width, so plan your enclosure gland plate and phase barrier spacing accordingly. The front face carries an IP40 rating, which is fine for a dry indoor panel but wouldn't want it out in the weather.
What it fits and what it protects
Rated insulation voltage is 800 V. The TM240 release is a fixed thermal-magnetic — no interchangeable trip units, no voltage-trigger or ground-fault monitoring option on this variant. Power loss maxes at 10.6 W — not nothing, but manageable in a ventilated enclosure. Storage range is -40 to 80 °C, operating range -25 to 70 °C, so it'll sit fine in an unheated warehouse or a warm panel room.