The Siemens SENTRON 3VA2110-5JQ32-0AG0 is a 3-pole molded case circuit breaker rated for 100 A continuous current at ambient temperatures up to 50 °C, with a 187 kA interrupting capacity at 240 V AC. The IP40 front panel protection keeps debris and incidental contact out of the breaker face, though the body itself is not sealed for washdown environments.
At 415 V and 440 V the breaker holds 121 kA, and at 500 V it still delivers 79 kA. The 690 V rating drops to 4.25 kA — that sharp roll-off is characteristic of the air-break arc chamber design, not a fault in the unit. For a 480 V distribution panel feeding motor control centers, the 79 kA SCCR at 500 V gives solid headroom above typical available fault currents in most industrial installations.
At 55 °C it derates to 96.25 A, at 60 °C to 92.5 A, and at 70 °C to 85 A. In a closed steel enclosure with multiple breakers side-by-side, internal ambient can easily hit 55 °C — factor that derating into your BOM current budget. The 181 mm height and 105 mm width fit the standard 3VA mounting footprint; depth is 86 mm.
Trip unit and auxiliary contacts
The ETU560 electronic trip unit supports communication functions, making this breaker suitable for integration into a power monitoring or energy management system. The 20 000-cycle mechanical endurance is typical for a 100 A frame MCCB in distribution duty — not a frequent-switching application, but adequate for routine isolation and fault clearing.