What the ratings mean for your panel
The 3VA1110-5EF32-0AD0 is a Siemens SENTRON 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 100 A. That 100 A holds flat from 40 °C to 50 °C — no derating needed in a typical warm panel — then steps down to 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C. The TM240 thermal-magnetic release means the thermal element is fixed at 100 A; the magnetic pickup is adjustable. The 187 kA breaking capacity at 240 V is what interrupts a massive fault without the arc flashing upstream — at 415 V it's still 121 kA, at 440 V it's 75.6 kA, and at 690 V it drops to 17 kA. That's a high-interrupting rating for a 100 A frame; it tells you this breaker is sized for a strong source-side fault current, not a weak secondary tap. The 70 mm depth and 76.2 mm width fit a standard MCCB footprint on the DIN rail or panel-mount plate. The IP40 front means it's protected against tools and wires >1 mm — fine inside a locked enclosure, but not for washdown or outdoor exposure. Three HQ auxiliary switches are built in; no undervoltage release, no shunt trip, no ground-fault module, no communication function. This is a straight thermal-magnetic breaker — no electronics to fail, no settings to lose on a power cycle.
Integration and compliance
Mounts on a DIN rail or direct to a panel backplate. The 130 mm height and 70 mm depth leave room for cable entry below the line terminals. Rated insulation voltage Ui is 800 V, so it's safe on 480 V and 600 V class systems. Latching endurance is 15 000 operations — that's the mechanical life, not the electrical switching life under load. The reference code per DIN EN 81346-2 is Q, which aligns with the circuit-breaker function in a standard schematic. Storage temperature range is -40 °C to 80 °C; operating range is -25 °C to 70 °C.