Its 3-pole construction and 25 A rating at 40 °C make it a fit for feeder circuits and branch protection in commercial and industrial switchgear.
Breaking capacity — what the voltage columns tell you
This breaker carries a 187 kA interrupting rating at 240 V AC, dropping to 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V.
Thermal derating — the continuous current curve
At 55 °C it derates to 24 A, holds at 24 A through 60 °C, then steps to 23 A at 65 °C and 70 °C. The flat profile up to 50 °C gives headroom in a warm enclosure; above that the 1–2 A drop is predictable and per the datasheet curve.
Integrated undervoltage release and auxiliary switching
The 3-pole width (76.2 mm, or 3 inches) is the standard SENTRON 3VA footprint for this frame size — it occupies three adjacent 25 mm DIN-rail modules if panel-mounted, or bolts directly to a mounting plate. Depth of 70 mm (2.76 in) leaves clearance for rear-access terminals in a typical 200 mm deep enclosure.