What this MCCB carries — and what it means on the panel
The Siemens 3VA1116-6EF32-0CH0 is a SENTRON molded case circuit breaker (MCCB) rated 160 A continuous at 40 °C, three-pole, designed for line protection in distribution panels. The headline breaking capacity is 220 kA at 240 V AC, dropping to 154 kA at 415 V and 75.6 kA at 440 V — still well above typical utility fault levels for most industrial services. At 500 V and 690 V it holds 17 kA, which is the figure to check if this breaker lands in a 690 V motor control center. The breaker includes a built-in undervoltage release (UVR) and a factory-fitted auxiliary switch block with 2 auxiliary switches plus 1 trip alarm switch HQ. That trip alarm signals on overcurrent or short-circuit trip, not just manual operation — useful for remote fault annunciation in a PLC-based distribution monitoring scheme.
Thermal derating — the real current rating depends on your panel ambient
The 160 A rating holds flat from 40 °C to 50 °C. Above that it derates: 158 A at 55 °C, 155 A at 60 °C, 153 A at 65 °C, and 150 A at 70 °C. If your panel ambient runs at 55 °C or higher, the breaker still carries the load but the trip curve shifts — account for the reduced headroom when coordinating with downstream protection.
Footprint and panel fit
Width is 76.2 mm (3 inches), depth 70 mm, height 130 mm. That's a standard 3-pole MCCB footprint — it will drop into a panel cutout or DIN-rail adapter designed for SENTRON 3VA fixed breakers. The 70 mm depth leaves clearance for rear busbar connections in a typical 200 mm deep enclosure.