Siemens 3VA2010-5JQ32-0BL0 — 100 A SENTRON MCCB with 187 kA Interrupting Capacity
The Siemens 3VA2010-5JQ32-0BL0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous at 40 °C through 70 °C — no derating needed across that full ambient span, per the datasheet. It carries a 187 kA interrupting capacity at 240 VAC, dropping to 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V. That SCCR headroom means it can be specified upstream of a panel with high available fault current without cascading coordination issues. This is a 3-pole unit designed for line protection, with an integrated undervoltage release (UVR) and communication function. The auxiliary switch configuration includes two auxiliary switches, one trip alarm switch, and one electrical alarm switch (HQ type). The basic switch supplied is order code 3VA20105JQ320AA0.
Interrupting Capacity and Coordination
The interrupting ratings span 187 kA at 240 V down to 3 kA at 690 V. For a 480 V panel (common in North American industrial distribution), the relevant figure is 121 kA at 440 V — that is the closest published point. This exceeds the typical 65 kA or 100 kA SCCR requirement for most motor control centers, so it provides margin for high-fault installations without needing a current-limiting fuse upstream.
Thermal Performance and Power Loss
Rated current holds at 100 A from 40 °C through 70 °C ambient — no thermal derating curve to calculate for standard panel environments. Maximum power loss is 16 W at rated load, which is modest for a 100 A frame. The unit measures 86 mm deep, 105 mm wide, and 181 mm high, fitting standard MCCB panel cutouts.