The 5SY4240-8: The breaker occupies 2 modular width units (36 mm) with a 70 mm installation depth (76 mm overall depth for finger-safe terminals). Panel designers can count on a compact footprint for DIN-rail layouts, and the quick-assembly system speeds mounting.
Mounting and environmental fit
Acceptable in any mounting position. Ambient range from -40 °C to 75 °C covers most indoor enclosures, with relative humidity limits decreasing above 55 °C (95 % RH at 55 °C down to 35 % at 75 °C). Vibration resistance per IEC 60068-2-6: 5 to 25 Hz at ±1 mm, 25 to 150 Hz at 50 m/s², so it holds up in machine-tool panels. IP20 protection with connected conductors; pollution degree 3 and overvoltage category III for fixed installations. Halogen-free and silicon-free construction — relevant for clean-room or high-reliability environments. Sealable terminals allow lockout/tagout compliance.
Compliance and standards
Designed to IEC/EN 60898-1 and IEC/EN 60947-2, with UL 1077 recognition for the AC rating (5 kA per UL 1077). Combined terminal top and bottom accept standard busbar or wire connections, with neutral conductor switching not integrated (external switching required for full isolation).