SENTRON 3VA2125-8JQ36-0AA0 — 25 A MCCB with communication and ground-fault monitoring
The Siemens SENTRON 3VA2125-8JQ36-0AA0 is a 3-pole molded case circuit breaker rated for 25 A continuous current, designed for line protection in distribution panels. It carries a 440 kA breaking capacity at 240 V, stepping down to 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V — the full SCCR curve you need for selectivity studies against upstream gear. Thermal derating is flat across the operating range: 25 A at 40 °C through 70 °C, meaning no ampacity knock-down in a warm enclosure. Storage range spans -40 °C to 80 °C; operating ambient is -25 °C to 70 °C. This MCCB includes a communication function and summation-current ground-fault monitoring on the L-conductor. No undervoltage release or trip indicator fitted on this variant. Maximum power loss is 0.5 W.
Dimensions and panel fit
Footprint: 105 mm wide, 181 mm tall, 86 mm deep. Standard SENTRON 3VA2 frame dimensions — drops into the same DIN-rail or screw-mount slot as other 3VA2 3-pole units. Verify busbar and lug kit compatibility with your existing panel layout.