The Siemens 3VA1116-6FF42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 80 A continuous, 4-pole, with a TM240 thermal-magnetic overcurrent release. It's designed for line protection — meaning it sits at the incoming feeder or main distribution point in a panel, not downstream on a motor branch. The interrupting rating hits 220 kA at 240 V, 154 kA at 415 V, and still holds 17 kA at 500 V and 690 V, so it handles high-fault-capacity service entrances without cascading upstream.
What the ratings mean for your panel
The 80 A frame is the continuous current rating at 40 °C ambient — that's the number you size your feeder conductors to. The TM240 release means the thermal element is fixed at 240 A frame rating, but the breaker is shipped with an 80 A continuous plug or setting; it's not adjustable down to a lower amp rating. The interrupting ratings tell you the maximum fault current it can safely clear at each voltage level: 220 kA at 240 V is typical for a high-capacity service entrance, while the 17 kA at 690 V still covers most industrial distribution. The 4-pole configuration handles three-phase plus neutral, common for North American 120/208 Y or European 230/400 Y systems where the neutral needs protection. Thermal derating is built in: the breaker carries 160 A at 40 °C through 50 °C, then drops to 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 hot — say near a furnace line or in a sealed enclosure — you need to factor that 150 A floor at 70 °C into your load calculation. The 38 W maximum power loss at rated current matters for enclosure heat rise; a panel with several of these side by side adds up. The IP40 rating on the front means it's protected against tools and wires over 1 mm, but not against water ingress — standard for indoor panel mounting. The 800 V rated insulation voltage gives headroom for 690 V systems. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C.
Panel fit and mounting
Dimensions are 130 mm high, 101.6 mm wide, 70 mm deep. That's a 4-inch wide footprint on the DIN rail or panel-mount plate. Four-pole breakers eat width — this one takes up about the same space as two standard single-pole 80 A breakers side by side. The 70 mm depth means it clears most 200 mm deep enclosures with room for wiring gutters. No undervoltage release, no shunt trip, no communication module on this variant — it's a plain line-protection MCCB.