Siemens 3VA1110-4EF32-0JH0 — 100 A MCCB with TM240 Release
The Siemens 3VA1110-4EF32-0JH0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current, configured as a 3-pole line protection device. Its TM240 thermal-magnetic overcurrent release handles the overload and short-circuit protection for feeder and distribution circuits in commercial and industrial panels. The interrupting ratings climb to 121 kA at 240 V AC and 75.6 kA at 415 V AC — numbers that tell you this breaker can clear high-fault conditions without cascading upstream, which is the deciding factor for panel SCCR compliance.
What the Ratings Mean for Your Panel
The 100 A rating holds flat from 40 °C through 50 °C ambient — no derating needed in a typical warm enclosure. At 55 °C it drops to 96 A, and at 70 °C it's 90 A. If your panel runs hot near the top of the gland plate, factor that 10 % loss into your load schedule. The 800 V rated insulation voltage (Ui) covers 480 V and 600 V class systems with margin. The TM240 release means the thermal element is calibrated for a 240 A frame — the breaker's continuous rating is set by the installed trip unit, not the frame. That gives you headroom to swap in a higher-rated trip later if the load grows, without pulling the breaker out of the panel. It ships with a shunt trip (STL) for remote emergency-off or supervisory tripping, plus 2 auxiliary switches and 1 trip alarm switch (HQ configuration). The auxiliary contacts let the PLC or BMS know the breaker state without adding a separate contactor block.
Panel Fit and Integration
The breaker measures 76.2 mm wide, 130 mm tall, and 70 mm deep — a standard 3-pole MCCB footprint that drops into most DIN-rail or panel-mount enclosures without re-drilling. The IP40 front protection means it's suited for indoor panel use where no water jets are present; keep it behind a locked door in washdown zones.