What this MCCB carries and where it fits
The Siemens SENTRON 3VA1110-5EF32-0BH0 is a 3-pole molded case circuit breaker (MCCB) rated 100 A continuous at 40 °C, with an interrupting capacity of 187 kA at 240 V AC. That 187 kA rating means it can safely clear a fault up to that level without rupturing — critical for high-fault-capacity service entrances or large transformer secondaries where available fault current is well above typical 25 kA or 65 kA breakers. The 100 A frame is thermally rated to carry full current up to 50 °C; above that it derates to 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C, so for a 100 A load in a 60 °C panel you need to step up a frame size or accept the 96 A limit. This is a line-protection design (not motor-protective), so it is sized for feeder and distribution circuits rather than individual motor overload duty. It includes an undervoltage release (UVR) as the auxiliary release, which automatically trips the breaker when supply voltage drops below a set threshold — useful for preventing re-acceleration after a brownout or for safety interlocks that require the breaker to open on loss of control power. The auxiliary switch configuration is 2 auxiliary switches plus 1 trip alarm switch HQ, giving three discrete signal outputs for status feedback to a PLC or annunciator panel.
Mounting and panel fit
The 3VA1110-5EF32-0BH0 measures 130 mm high, 76.2 mm wide, and 70 mm deep. It mounts on a DIN rail or directly to a backplate via screw terminals. The 76.2 mm (3-inch) width for a 3-pole MCCB is standard for the 3VA frame — it occupies roughly 3 module spaces on a DIN rail. For a retrofit into an existing panel, the depth of 70 mm (2.76 in) is shallow enough to clear most enclosure doors without a deep gland plate. The rated insulation voltage is 800 V, so it is suitable for 480 V and 600 V class systems with margin.