160 A MCCB with 121 kA interrupting capacity — line protection for distribution panels
The Siemens SENTRON 3VA1116-4EF36-0CC0 is a 3-pole molded case circuit breaker (MCCB) rated 160 A at 40 °C, designed for line protection in low-voltage power distribution. Its interrupting capacity reaches 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — figures that tell you it can clear high-fault-current events on the secondary side of a distribution transformer without cascading upstream. The 800 V rated insulation voltage confirms it is built for 400/480 V class panels with headroom. Rated current holds at 160 A from 40 °C through 50 °C, then derates to 158 A at 55 °C and 150 A at 70 °C. That thermal curve means you can load it at full nameplate in a ventilated enclosure; in a sealed, high-ambient panel you drop 6% at the top of the operating range. The breaker dissipates 40.5 W maximum — a number to include in your enclosure thermal budget. This unit ships with an undervoltage release (UVR) and two HQ auxiliary switches integrated. The UVR trips the breaker when control voltage drops below a threshold — standard for safety circuits that need to drop power on loss of control supply. The auxiliary switches provide status feedback to a PLC or indication lamp.
Panel fit and environmental limits
Footprint is 70 mm deep, 76.2 mm wide, 130 mm tall — a standard MCCB form factor that fits most 3-pole distribution panelboards and motor control center buckets. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The -25 °C floor means it is suitable for unheated electrical rooms in temperate climates, though not for deep-freeze applications.