DC-rated miniature circuit breaker for 440 V systems
This is a DC-only breaker — the evidence shows no AC voltage rating. The B-curve trips between 3 and 5 times rated current, so a 2 A unit holds through inrush from a small DC motor or capacitive load but clears a 6–10 A fault within the instantaneous band.
Rated for ambient temperatures from -40 °C to 75 °C, with humidity derating above 55 °C: 95% RH up to 55 °C, 55% RH to 70 °C, and 35% RH to 75 °C. Vibration resistance per IEC 60068-2-6 covers ±1 mm at 5–25 Hz and 50 m/s² at 25–150 Hz — it holds up on a machine frame or in a mobile substation.