Siemens 3VA1116-4EF32-0DH0 — SENTRON MCCB, 160 A, 3-Pole, Line Protection
The Siemens 3VA1116-4EF32-0DH0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 160 A at 40 °C (derated to 150 A at 70 °C per the thermal curve). It is a three-pole unit with a rated insulation voltage of 800 V, and its maximum breaking capacity reaches 121 kA at 240 V AC — sufficient for high-fault utility feeds or transformer secondaries where SCCR headroom is critical. This breaker includes an undervoltage release (UVR) as the auxiliary release type, plus two auxiliary switches and one trip alarm switch (HQ configuration) — enough for remote status indication and undervoltage trip coordination in a safety circuit.
Breaking Capacity Across Voltages — Selectivity Planning
The 3VA1116-4EF32-0DH0 delivers 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. These figures define the maximum prospective fault current the breaker can safely interrupt at each voltage level — essential for coordination studies and ensuring the MCCB is not applied beyond its interrupting rating on a high-fault bus.
Thermal Derating and Ambient Operating Range
Rated 160 A continuously at 40 °C through 50 °C, the breaker begins to derate above 55 °C: 158 A at 55 °C, 155 A at 60 °C, 153 A at 65 °C, and 150 A at 70 °C. The operating ambient range is -25 °C to +70 °C, with storage from -40 °C to +80 °C. Maximum power loss is 40.5 W.
Dimensions and Panel Integration
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures without requiring backpan modifications. The 70 mm depth is the dimension from the mounting surface to the front of the breaker, which governs the minimum enclosure depth.