Transformer-protection circuit breaker, 1.25 A, CLASS 10
This means it handles the inrush of a transformer without nuisance tripping — CLASS 10 allows up to 10 seconds at 7.2x rated current, which covers magnetizing inrush on small to medium transformers. The 100 kA breaking capacity holds at 240 V, 400 V, 500 V, and 690 V AC, so this single part covers the full low-voltage range without derating on fault clearing. The auxiliary switch is a transverse design and the product extension allows adding auxiliary contacts later without replacing the entire unit.
Mounting and wiring — 45 mm wide, screw terminals, DIN rail
Screw-type terminals on both the main and auxiliary/control circuits. Main circuit accepts 2x (0.5 to 1.5 mm²) solid or 2x (1 to 2.5 mm²) stranded, and 2x (0.75 to 2.5 mm²) solid or 2x (2.5 to 6 mm²) stranded — covers most panel wiring up to 6 mm². AWG equivalents are 2x (14 to 10) for the main contacts. Front protection is IP20, safe for finger-probe access inside an enclosure.
Environmental limits and power dissipation
Operates from -20 °C to +60 °C, stores and transports from -50 °C to +80 °C. Shock resistance is 25g for 11 ms.