The Siemens SENTRON 3VA1125-5EF32-0AG0 is a 3-pole molded case circuit breaker (MCCB) rated for 25 A continuous current at 40 °C, with a TM240 thermal-magnetic overcurrent release. Its interrupting capacity reaches 187 kA at 240 VAC, 121 kA at 415 VAC, and 75.6 kA at 440 VAC — figures that place it in the high-breaking-capacity tier of the 3VA platform, sized for main feeder or high-fault branch protection in industrial switchboards.
What the interrupting ratings mean for panel coordination
The TM240 release is fixed, not adjustable for long-time pickup, but the thermal memory tracks prior heating — useful on motor-starting duty where repeated inrush could nuisance-trip a plain thermal breaker.
Mounting and integration notes
The 76.2 mm width (roughly 3 inches) and 70 mm depth fit standard 3VA panel cutouts and bus-bar centers.
