Siemens SENTRON 3VA1116-4EF32-0JC0 – 160 A MCCB with shunt trip
The Siemens SENTRON 3VA1116-4EF32-0JC0 is a 3-pole molded case circuit breaker (MCCB) rated 160 A continuous at 40 °C, designed for line protection in industrial power distribution. It carries a breaking capacity of 121 kA at 240 V AC and 75.6 kA at 415 V AC — figures that cover most low-voltage fault scenarios in North American and European panels without cascading upstream. The rated insulation voltage is 800 V, giving headroom for 480/600 V systems. This variant ships with a factory-fitted shunt trip (STL) and two auxiliary switches (HQ) — common for remote tripping and status feedback in automated lines. No undervoltage release or ground-fault module is included; those are separate add-ons if needed.
Breaking capacity and thermal derating
The 121 kA at 240 V is the headline interrupting rating — enough to handle faults near the transformer secondary in most commercial and light industrial panels. At 415 V (common in European 400 V networks) it still delivers 75.6 kA, and at 500 V it holds 11.9 kA. The thermal rating holds at 160 A up to 50 °C, then derates gradually to 150 A at 70 °C — useful if the breaker sits in a warm enclosure near other heat sources. Power loss at full load is 38 W maximum — factor that into enclosure ventilation if the panel is tightly packed.
Integration and mounting
The breaker occupies a 76.2 mm wide, 130 mm tall, 70 mm deep footprint — three standard 25 mm DIN module widths. It clips onto a 35 mm DIN rail; the shunt trip and auxiliary switches are pre-installed, so no additional wiring for those functions is needed during panel build. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.