Siemens SENTRON 3VA1110-5EF32-0JA0 — 100 A MCCB with Shunt Trip
The Siemens SENTRON 3VA1110-5EF32-0JA0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current, fitted with a TM240 thermal-magnetic overcurrent release and an integrated shunt trip (STL) for remote tripping. Breaking capacity hits 187 kA at 240 V and 121 kA at 415 V — enough for high-fault utility feeds or transformer secondaries where fault current runs hot. Rated insulation voltage is 800 V, so it handles 480/600 V class systems with headroom for coordination studies.
What the Ratings Mean for Panel Fit
The 100 A rating holds flat from 40 °C to 50 °C — no derating needed in a warm enclosure. At 55 °C it drops to 96 A, at 70 °C to 90 A, so if your panel ambient sits above 50 °C, size the breaker for the actual load at temperature. The TM240 release is a fixed thermal-magnetic trip unit; there's no interchangeable rating plug, so the breaker is locked to its 100 A frame. If you need field-adjustable ampacity, look at the electronic-trip variants in the 3VA family. Front protection is IP40 — fine for a closed panel, but not rated for dust or hose-down. The shunt trip (STL) allows an E-stop or PLC to open the breaker remotely; no undervoltage release or auxiliary contacts are fitted on this order code.
Panel and Integration Notes
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — standard 3-pole MCCB footprint for DIN-rail or base-mount installation in a SENTRON distribution board or separate enclosure. Latching endurance is rated at 15,000 operations — sufficient for manual disconnect duty, not for frequent motor starting. The shunt trip coil (order code 3VA9688-0BL32) is integrated; verify control voltage matches your system before wiring.