The 3-pole design (3P) protects three-phase loads up to 1 A per phase, tripping instantaneously on short-circuit and on overloads between 3 and 5 times rated current — typical for lighting, control transformers, and resistive loads in industrial panels.
At 40 °C ambient the 1 A rating derates to 0.94 A; at 55 °C it drops to 0.84 A. If the panel runs hot, size up one frame rather than risk nuisance tripping. The B-curve means the magnetic trip fires between 3× and 5× In (3–5 A for this 1 A unit), so it suits resistive or lightly inductive loads with low inrush. For motor starting or transformer inrush, a C or D curve would be the better call.
Operating range -40 °C to 75 °C, with humidity derating: max 95% RH up to 55 °C, tapering to 35% at 75 °C. Halogen-free and silicon-free construction — important for sensitive electronics or clean-room adjacent panels. Vibration tested per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz.