This 3VA1110-3GF46-0AA0 is a SENTRON molded case circuit breaker (MCCB) from Siemens, configured for line protection with four poles and a TM240 thermal-magnetic overcurrent release. It carries a continuous current rating of 100 A, which it can sustain up to 50 °C without derating; above that, the allowable current steps down to 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C, so the ambient temperature inside the enclosure directly governs the load it can protect.
Breaking capacity — what the voltage-specific ratings mean for fault coordination
The interrupting capacity varies sharply with system voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. For a 480 V panel (common in North American industrial distribution), the 32 kA at 440 V is the nearest published point — expect the actual SCCR at 480 V to fall between the 440 V and 500 V figures. The 11.9 kA ceiling at 690 V makes this breaker suitable for 690 V systems only where the available fault current is confirmed below that threshold.
Panel fit and integration
Dimensions are 130 mm high, 101.6 mm wide, and 70 mm deep — a 4-inch wide footprint that occupies one standard MCCB slot in a SENTRON panelboard or distribution block. The front face carries an IP40 protection class, adequate for enclosed panel mounting but not for washdown environments. No undervoltage release, no shunt trip, and no communication module are built in; those functions require external accessories or a different variant.
Thermal-magnetic release characteristics
The TM240 designation means the thermal-magnetic trip unit is fixed at 100 A — not adjustable. The maximum power loss at rated current is 25 W, which contributes to enclosure heat rise and should be factored into the thermal budget when multiple breakers are ganged in a small cabinet.