The 400 V AC / 440 V DC voltage rating means it can switch single-phase or three-phase loads within those limits — the DC rating is particularly relevant for control panels with 24 V or 48 V DC supplies, where the arc extinction differs from AC. This suits single-phase 230 V AC circuits or two-wire DC circuits where both poles need overcurrent protection. The IP20 rating applies only with connected conductors, so the terminals are finger-safe once wired but the busbar area is not protected against moisture; keep it inside a sealed enclosure in washdown environments.
The breaker is certified to IEC/EN 60898-2 and UL1077, covering both the IEC household-type standard and the UL supplementary protector standard. This dual certification simplifies panel approvals for equipment exported to North America and Europe. The operating temperature range spans -40 °C to 75 °C, with humidity derating above 55 °C (95% RH up to 55 °C, 55% RH up to 70 °C, 35% RH up to 75 °C). The vibration resistance per IEC 60068-2-6 (±1 mm at 5–25 Hz; 50 m/s² at 25–150 Hz) confirms suitability for installation on machinery or in mobile equipment panels.