What it is and what the ratings mean for fit
The Siemens SENTRON 3VA1110-3EF36-0HA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, with a rated continuous current Iu of 100 A. The interrupting capacity varies by system voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. That spread tells you the breaker is sized for high-fault industrial distribution panels where the available short-circuit current at the bus is known — the 75.6 kA at 240 V covers most North American 240/120 V split-phase or 240 V three-phase services, while the 52.5 kA at 415 V suits European 400 V grids. The 10.5 kA at 690 V is a derated figure for 690 V three-phase systems, common in mining or marine installations. The overcurrent release is a TM240 thermal-magnetic type — the '240' indicates the thermal trip element is calibrated for a 100 A frame with a magnetic short-circuit pickup adjustable around 240 A. No undervoltage release, no auxiliary contacts, no ground-fault monitoring, and no communication function are fitted on this variant. The shunt trip (STL) is present, wired to the 3VA9688-0BL30 auxiliary trip unit, allowing remote tripping from a safety circuit or emergency-stop chain. Thermal derating is documented across the ambient range: the breaker carries 100 A continuously from 40 °C through 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 the panel ambient runs above 50 °C, the continuous load must be reduced per that curve. The rated insulation voltage Ui is 800 V, and the IP40 front protection means the breaker face is protected against tools and small wires but not against water ingress — mount it inside a rated enclosure.
Physical fit and panel integration
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth. The 76.2 mm width (3-inch footprint) is standard for a 3-pole MCCB in this frame size — it occupies three 25.4 mm module positions on a DIN rail or panel-mount plate. The 70 mm depth leaves clearance for rear bus connections and cable bending radius inside the enclosure. Storage temperature range is -40 °C to 80 °C; operating range is -25 °C to 70 °C.