The Siemens SENTRON 3VA1110-3EF32-0DA0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection, rated 100 A continuously at 40 °C with a TM240 thermal-magnetic overcurrent release. It carries a 75.6 kA interrupting capacity at 240 V AC, derating to 52.5 kA at 415 V and 11.9 kA at 690 V — figures that govern its fault-clearing capability in a given system voltage.
Ratings and what they mean for panel fit
The 100 A rating holds across 40 °C to 50 °C ambient; above that it derates linearly to 91 A at 70 °C. For a panel running warm — say 55 °C internal — the breaker is good for 98 A, not the full 100 A. The 800 V rated insulation voltage (Ui) means it is suitable for 690 V line-to-line systems with adequate clearance. Breaking capacity at 240 V is 75.6 kA, at 415 V it is 52.5 kA, at 440 V it is 32 kA, and at 500 V and 690 V it is 11.9 kA. These are the maximum prospective fault currents the breaker can safely interrupt at each voltage level — critical for SCCR compliance of the panel assembly. The unit includes an undervoltage release (UVR) as the auxiliary release type, which trips the breaker when supply voltage drops below a set threshold — a common requirement for safety circuits that must fail open on loss of control power. Dimensions are 70 mm depth, 76.2 mm width, and 130 mm height — a standard 3-pole MCCB footprint for DIN-rail or panel-mount installation. Maximum power loss is 27.5 W, which contributes to the thermal budget inside the enclosure.