The Siemens SENTRON 3VA2110-5JQ32-0AJ0 is a 3-pole molded case circuit breaker (MCCB) rated for line-protection duty, carrying a continuous current of 100 A across its full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. That flat thermal curve simplifies panel schedules: one breaker size covers the distribution board regardless of enclosure stack temperature, as long as it stays within the -25 °C to 70 °C operating window. Breaking capacity steps with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. At typical 400 V distribution levels the 121 kA rating handles high-fault scenarios common in industrial switchgear without requiring upstream current-limiting fuses.
Integration and mounting
Dimensions are 86 mm deep, 105 mm wide, and 181 mm tall — a standard MCCB footprint that fits most DIN-rail or panel-mount enclosures without re-drilling. The 3-pole body leaves room for the factory-fitted auxiliary switch block (2 auxiliary switches plus a trip alarm switch) on the side, so adding status feedback to a PLC or SCADA doesn't consume extra panel width. Power loss is rated at 10 W maximum — negligible for thermal budgeting inside a sealed enclosure, but worth noting if multiple breakers are ganged in a small cabinet without forced ventilation.