What this MCCB carries — and where it fits
The Siemens SENTRON 3VA1110-5EF32-0CA0 is a 3-pole molded case circuit breaker (MCCB) rated for line-protection duty, with a continuous current Iu of 100 A and an interrupting capacity of 187 kA at 240 V — enough to handle high-fault utility feeds or transformer secondaries without cascading upstream. The TM240 thermal-magnetic release handles overloads and short-circuits; there is no electronic trip unit, no communication module, and no ground-fault monitoring on this variant. It includes an undervoltage release (UVR) that trips the breaker when control voltage drops, which is common in emergency-stop or undervoltage-protection schemes. Rated insulation voltage Ui is 800 V, and the interrupting curve drops to 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V — so the same breaker can be applied across 240–690 V systems as long as the available fault current stays under those thresholds. The 70 mm depth and 76.2 mm width match the standard 3VA fixed-mount footprint; it bolts directly onto the same busbar or mounting plate as other 3VA frames without re-drilling.
Thermal derating — what the 100 A means in a warm panel
The 100 A rating holds flat from 40 °C through 50 °C — no derating needed in a typical ventilated enclosure. At 55 °C it drops to 96 A, at 60 °C to 94 A, at 65 °C to 92 A, and at 70 °C to 90 A. If the panel ambient sits above 50 °C, size the breaker for the actual load at the expected temperature, not the nameplate 100 A.
What is not on this variant
No auxiliary contact block is fitted (auxiliary contact version: Without), no trip indicator, no voltage trigger, no phase-failure detection, and no communication function. The only auxiliary release is the undervoltage release (UVR). If you need a shunt trip, auxiliary contacts, or an electronic trip unit, this is not the variant — the 3VA1110-5EE32-0JA0 carries a different release and auxiliary-contact configuration.
Panel fit and integration
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a compact footprint that leaves room for adjacent breakers or terminal blocks on the same mounting plate. IP40 on the front means it is protected against tools and solid objects larger than 1 mm, but not against water ingress; keep it inside a sealed enclosure if washdown or condensation is expected. The UVR coil (order code 3VA9608-0BB24 for the integrated auxiliary trip) is factory-fitted; verify the control-voltage rating matches your circuit before applying power.