It provides L (overload) protection via a thermal element and I (short-circuit) protection via a magnetic element, covering the two basic protection curves for distribution feeders. The 4-pole configuration (4P) with neutral on the left handles three-phase plus neutral circuits common in panelboard and switchboard distribution. Breaking capacity varies by system voltage: 100 kA Icu at 240 V AC, 70 kA at 415 V AC, 65 kA at 440 V, 50 kA at 500 V, 35 kA at 525 V, and 10 kA at 690 V AC, all per IEC 60947-2. The H breaking capacity code (70 kA at 415 V) places it in the high-interrupting tier for 400 V-class industrial distribution — enough headroom for most transformer-fed services without cascading upstream.
Overvoltage category III suits fixed-installation distribution downstream of the main service entrance.
Rated for 20,000 mechanical cycles and 20,000 electrical cycles at 440 V at rated current (In), with higher cycle counts at half load (20,000 at In/2, 10,000 at In/2 at 690 V).