What this MCCB is and what its ratings mean for your panel
The Siemens SENTRON 3VA1110-5EF36-0JA0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current at 40 °C, with a TM240 thermal-magnetic overcurrent release and an integrated shunt trip (STL) for remote tripping. It is designed for line protection — meaning it sits at the feeder or distribution point, not as a motor-protective device. The 187 kA breaking capacity at 240 V is the headline number, but the 121 kA at 415 V and 75.6 kA at 440 V are what matter for most industrial 400 V panels: that SCCR gives you headroom to coordinate with downstream breakers without cascading faults upstream. At 690 V it still interrupts 17 kA, so it handles 690 V distribution in mining or marine applications. The 70 mm depth and 76.2 mm width mean it fits a standard 3-pole MCCB footprint on a DIN rail or mounting plate. The IP40 front protection keeps dust out of the enclosure face, but the body is not sealed — mount it in a panel with a door, not in a washdown zone. The shunt trip (order code 3VA9688-0BL32 for the integrated auxiliary trip) lets you drop the breaker from a remote E-stop or PLC output, but there is no undervoltage release and no auxiliary contact built in, so if you need status feedback or UVR, you add external accessories.
Thermal derating and operating limits
The 100 A rating holds flat from 40 °C to 50 °C, then drops to 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C. If your panel ambient runs above 50 °C — say, a crowded enclosure near a furnace line — size the load at 90 A to avoid nuisance tripping. The operating range is -25 °C to 70 °C, storage from -40 °C to 80 °C, so it ships and sits fine in unheated warehouses.
Integration notes for the panel builder
Mount on a DIN rail or direct plate. The 76.2 mm width matches standard 3-pole MCCB cutouts. The shunt trip coil is ordered separately (3VA9688-0BL32) and installs into the auxiliary trip slot on the breaker.