What it is — and what the ratings mean for your panel
The Siemens 3VA1116-3EF36-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection in distribution panels. It carries a continuous current of 160 A at 40 °C, with the same rating holding steady through 50 °C — then it derates slightly to 158 A at 55 °C, 155 A at 60 °C, 153 A at 65 °C, and 150 A at 70 °C. That means if your panel runs hot near the top of the enclosure, you still have a solid 150 A of headroom before the breaker thinks twice. The interrupting capacity is what decides whether this breaker survives a fault without welding its contacts shut. At 240 V it clears 75.6 kA; at 415 V it handles 52.5 kA; at 440 V it drops to 32 kA; and at 500 V and 690 V it holds at 11.9 kA. For a 480 V delta or 400 V wye distribution board, that 52.5 kA at 415 V gives you real selectivity margin against a big transformer feeding a fault. The overcurrent release is a TM240 thermal-magnetic unit — a fixed thermal bimetal and fixed magnetic trip, no electronic adjustment. That keeps the part simple and reliable for standard feeder protection where you don't need to dial in the trip curve. Three poles, no undervoltage release, no ground-fault monitoring, no communication module. It's a workhorse breaker, not a smart one.
Panel fit and integration
The 3VA1116-3EF36-0AA0 measures 70 mm deep, 76.2 mm wide, and 130 mm tall — about 2.76 by 3 by 5.12 inches. That width is a standard 3-inch footprint for a 3-pole MCCB, so it drops into most DIN-rail or panel-mount bases without re-drilling. The front face carries an IP40 rating — fine for a clean indoor panel, but not for washdown areas. Keep it behind a sealed enclosure door if there's moisture or dust around.
How it compares to the closest sibling
The closest functional sibling is the 3VA1110-5ED32-0AA0 — a 3-pole, 100 A frame with a different release. The 3VA1116-3EF36-0AA0 carries a higher continuous rating (160 A vs 100 A) and a TM240 release versus the 3VA1110's ETU electronic trip. If your load is under 100 A and you want adjustable trip settings, the 3VA1110 is a better fit. But for fixed 160 A feeder protection, this 3VA1116 is the right choice — same footprint, same interrupting ratings, just a simpler release and higher ampacity.