What this 3VA1116-3EF36-0AG0 is and what it does
The Siemens 3VA1116-3EF36-0AG0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It's a 3-pole unit rated 160 A continuous at 40 °C with a TM240 thermal-magnetic overcurrent release — meaning the thermal pickup is fixed at 160 A, and the magnetic instantaneous trip is adjustable around 240 A. The interrupting capacity hits 75.6 kA at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V, dropping to 11.9 kA at 500 V and 690 V. That 75.6 kA at 240 V tells you it's sized for high-fault service entrances or sub-feeders where available fault current is substantial.
Ratings and what they mean for fit
The 160 A rating holds steady from 40 °C through 50 °C — no derating needed in a warm panel up to that point. At 55 °C it's 158 A, at 60 °C it's 155 A, at 65 °C it's 153 A, and at 70 °C it's 150 A. So if your panel ambient runs 60 °C, you lose 5 A off the nameplate — plan for that in the load calculation. The insulation voltage is rated 800 V, which gives headroom for 690 V systems. Maximum power loss is 38 W — that's the heat this breaker dumps into the enclosure, so factor it into the thermal budget if you're stacking several in a tight cabinet. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The trip indicator gives a visual flag when the breaker has tripped on overcurrent — useful for a quick panel walk-down without opening doors. The auxiliary switch configuration is 1 auxiliary switch + 1 trip alarm switch HP, so you get both a status signal and a separate alarm on trip.
Where it fits in the panel
Physical footprint: 130 mm height, 76.2 mm width, 70 mm depth. That 70 mm depth is shallow enough to fit most standard distribution boards without a deep-can extension. The 76.2 mm width (3 inches) is the standard MCCB pole pitch — it'll drop into a 3-pole mounting base without adapters. Designed for line protection, so it's the main or feeder breaker, not a motor-protective device.