What it is and what the ratings mean
The Siemens 3VA1110-6GD46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current with a 4-pole configuration, making it suitable for three-phase plus neutral protection in distribution panels and motor branch circuits. The TM210 overcurrent release combines a thermal element for overload protection and a magnetic element for short-circuit response — the adjustable magnetic pickup goes up to 1,000 A, which lets you dial in the instant trip threshold to coordinate with downstream devices. Breaking capacity varies sharply with system voltage: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V. That 220 kA figure at 240 V means it handles high-fault-current utility feeds without cascading upstream; the drop to 17 kA at 690 V tells you this breaker is sized for 480 V-class systems, not 690 V industrial mains.
Thermal derating — where the 100 A rating holds and where it doesn't
The 100 A continuous rating holds at 45 °C and 50 °C ambient. At 55 °C it derates to 98 A, at 60 °C to 96 A, at 65 °C to 94 A, and at 70 °C to 91 A. Maximum operating ambient is 70 °C; storage range spans -40 °C to 80 °C. If your panel internal temperature runs above 50 °C, the breaker still delivers 96-98 A — not a hard limit for most 100 A feeder circuits, but worth confirming against the connected load's actual draw.
Panel fit and mounting
Footprint is 101.6 mm wide by 130 mm tall by 70 mm deep. The 4-inch width (101.6 mm) matches standard MCCB panel cutouts for a 4-pole frame. IP40 on the front face means it's protected against tools and wires larger than 1 mm — fine for enclosed distribution boards, not for washdown locations. Power loss is 25 W maximum at rated current; that's the heat you need to vent in a sealed enclosure. Optional motor drive available for remote tripping or re-closing schemes.