What this 3VA1110-5EF32-0HC0 brings to a panel
The Siemens 3VA1110-5EF32-0HC0 is a SENTRON molded case circuit breaker (MCCB) rated 100 A at 40 °C, 3-pole, with a breaking capacity of 187 kA at 240 V AC — enough to handle high-fault utility feeds or transformer secondaries without cascading upstream gear. It carries a shunt trip (STL) release and two HQ auxiliary switches built in, so it can be wired for remote trip or status feedback without adding external modules. Rated insulation voltage is 800 V.
Breaking capacity — what the numbers mean across voltages
The short-circuit rating drops as line voltage rises: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. At 690 V the 17 kA rating is still adequate for most industrial motor branch circuits; the 187 kA at 240 V makes it a strong choice for low-voltage high-fault panels common in commercial mains.
Thermal derating — don't lose headroom at elevated panel temps
Rated 100 A from 40 °C through 50 °C, then derates to 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. If the panel ambient runs above 50 °C, size the upstream feed for the derated value — the 91 A at 70 °C is still a solid 100 A frame, just with less continuous headroom.
Panel fit — dimensions and mounting
Footprint is 76.2 mm wide (3 in), 130 mm tall (5.12 in), 70 mm deep (2.76 in) — standard 3-pole MCCB envelope for a 100 A frame. Mounts on a DIN rail or direct panel; the 70 mm depth leaves room behind the gland plate for wiring bends.