The Siemens 3VA1110-4FE46-0AA0 is a SENTRON molded case circuit breaker (MCCB) sized for line protection in distribution panels. Rated for 100 A continuous current at 40 °C, it uses a TM220 thermal-magnetic release — fixed thermal and magnetic trip elements, no electronic adjustment. The four-pole design handles three-phase-plus-neutral or three-phase with switched neutral applications. Breaking capacity is the headline figure for this frame: 121 kA at 240 V, 76 kA at 415 V, and 53 kA at 440 V. At 500 V and 690 V the rating settles at 11.9 kA. Those numbers tell you this breaker is built for high-fault-current panels — think transformer secondaries or large motor control centers where upstream fault current exceeds 50 kA. The thermal derating curve holds full 100 A up to 50 °C, then drops gradually to 91 A at 70 °C.
Lifecycle and sourcing posture
The 3VA platform is Siemens' current-generation MCCB family, so documentation, accessories, and coordination data are all actively supported. No last-time-buy window to track.
Panel fit and integration
The 3VA1110-4FE46-0AA0 measures 101.6 mm wide, 130 mm tall, and 70 mm deep — a 4-inch-wide footprint that matches the standard SENTRON 3VA frame. It mounts via screw terminals onto a mounting plate or DIN rail adapter (not integral DIN-rail clip; the 3VA frame uses a separate mounting bracket for DIN or panel-mount). IP40 on the front face means it is protected against tools and wires larger than 1 mm — standard for enclosed distribution boards, not for washdown environments. The N-conductor protection is set at 50% of the phase rating — a common setting for distribution where the neutral is not expected to carry full phase current. No communication function or ground-fault monitoring is built in; those are separate accessory modules.
Selectivity and coordination context
With 121 kA breaking capacity at 240 V and 76 kA at 415 V, this breaker can be used as a main or feeder in panels with high available fault current. The TM220 release provides fixed thermal (overload) and fixed magnetic (short-circuit) trip characteristics — no interchangeable trip units. For selective coordination with downstream breakers, use Siemens' selectivity tables for the 3VA family; the high interrupting rating at lower voltages gives headroom for full selectivity up to the rated values.