What this MCCB is and where it fits
The Siemens SENTRON 3VA2110-5HN32-0CA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection at 100 A continuous current. It carries an interrupting capacity of 187 kA at 240 V AC, stepping down to 121 kA at 415/440 V, 79 kA at 500 V, and 4.25 kA at 690 V — enough headroom for most industrial main or feeder applications where high fault current is expected. The ETU350 electronic trip unit provides adjustable overload and short-circuit protection curves, and the built-in undervoltage release (UVR) trips the breaker when control voltage drops, a common requirement for safety circuits and emergency-stop chains. Physically, it measures 105 mm wide by 181 mm tall by 86 mm deep — a standard SENTRON 3VA frame that fits existing panel cutouts and busbar layouts for the series. Rated insulation voltage is 800 V, and it operates from -25 °C to 70 °C, with a thermal derating curve starting at 55 °C (96.25 A) down to 85 A at 70 °C. Maximum power loss is 12.5 W, which helps when sizing enclosure ventilation.
How it compares to the 3VA1110-5EE32-0DC0
The 3VA1110-5EE32-0DC0 is a lower-interrupting variant (typically 65 kA at 240 V) in the same 3VA frame size. Both share the 100 A frame and ETU electronic trip, but the 3VA2110-5HN32-0CA0 delivers 187 kA at 240 V — nearly triple the fault-current handling. If your panel was specified around the 3VA1110, this unit will physically drop into the same mounting footprint and busbar connections, but the higher interrupting rating may require coordination re-check with downstream devices. No rewiring needed for the breaker itself.