The Siemens 3VA2110-7MN36-0AF0 is a SENTRON molded case circuit breaker (MCCB) for motor protection, rated 100 A continuous current and built around the ETU350M electronic trip unit. It is a 3-pole unit with a 1 auxiliary switch plus 1 trip alarm switch (HQ) and phase failure detection built in.
Interrupting capacity and thermal derating
Interrupting capacity is 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 52.5 kA at 690 V — so at typical 400 V class it clears 242 kA, which covers most high-fault industrial services without upstream fusing. Thermal derating starts at 55 °C: full 100 A up to 50 °C, then 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C. In a hot panel — say a packed enclosure near a drive — that 90 A floor at 70 °C matters for sizing the branch circuit.
Physical fit and panel integration
Dimensions: 181 mm high, 105 mm wide, 86 mm deep. That 105 mm width is a standard three-pole MCCB footprint — fits most existing panel layouts without re-drilling or re-bussing. Maximum power loss is 75 W, so plan some air movement in a crowded enclosure.