Mersen LINOCUR D0 63A 400VAC 3-Pole Fuse-Switch Disconnector B1012622

Panel builders and maintenance electricians working in industrial control cabinets need a reliable way to isolate three-phase circuits without sacrificing overcurrent protection. The Mersen LINOCUR D0 fuse-switch disconnector delivers both functions in one compact DIN-rail unit, rated for 63 A at 400 VAC. It accepts D01 and D02 fuse links, so you can switch and protect with a single device.

Key specifications

• Series: LINOCUR D0
• Number of poles: 3
• Rated current (In): 63 A
• Rated voltage (Ue): 400 VAC
• Rated insulation voltage (Ui): 690 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Fuse system compatibility: D01, D02
• Mounting: DIN rail (EN 60715)
• Terminal type: screw terminals, max. 35 mm² rigid / 25 mm² flexible
• Protection degree: IP40 front, IP20 terminals
• Operating temperature: -25 °C to +55 °C
• Standards: IEC/EN 60947-3
• Rated conditional short-circuit current: 50 kA with appropriate fuses
• Endurance: 10,000 mechanical cycles, 1,000 electrical cycles

Why choose it

This disconnector is built for longevity in demanding environments. The screw terminals provide secure connections even under vibration, and the IP40 front protection prevents accidental contact with live parts during switching. Its compact 3-module width saves valuable rail space, while the high 50 kA conditional short-circuit rating ensures robust protection when paired with the right fuses.

Ideal use cases

• Industrial control panels and distribution boards
• Three-phase circuit isolation and protection up to 63 A
• Applications requiring DIN-rail mounting and fuse integration
• Environments with high vibration where secure terminations are critical

Good to know

The device is compliant with IEC/EN 60947-3 and designed for use with D01 and D02 fuse links. It operates reliably from -25 °C to +55 °C, making it suitable for a wide range of industrial settings. The front IP40 rating means fingers cannot touch live parts, while the terminal area maintains IP20 for basic safety during wiring.