Fuse Switch Disconnector 630A

Wöhner 33203 is a heavy-duty NH3 fuse switch disconnector (Quadron Volbreaker) designed for safe switching and protection of high-current circuits in low-voltage power distribution systems.

Key Features

• Product Type: NH3 Fuse Switch Disconnector (Quadron Volbreaker)

• Number of Poles: 3-pole (panel mounting)

• Rated Operational Voltage: 690 V AC

• Rated Current: 630 A

• Short-Circuit Strength: 50 kA (with gL/gG fuse links)

• Switching Capacity / Application Categories:

  • AC23 B (400 V)

  • AC22 B (690 V)

  • AC21 B (690 V)

  • DC21 B (440 V)

• Fuse Size: For NH fuses to DIN 43620, size 3 (up to 48 W power loss per fuse)

• Power Dissipation at Nominal Current: 36 W

• Terminals: Screw M12, tightening torque 35–40 Nm

• Mounting: Panel mounting, fastened by screws

• Dimensions (WxHxD): 256 × 300 × 143 mm

• Weight: 4.9 kg per unit (490 kg per 100 units)

• Protection & Safety:

  • Arc chambers for safe disconnection

  • Two-piece shock protection cover for reliable cable connection

  • Lid with self-closing inspection holes

• Standards: IEC/EN 60947-1, IEC/EN 60947-3

• Approvals: IEC (CB), GOST, CCC, Germanischer Lloyd, Switzerland, Netherlands

• Accessories: Covers, prism terminals, trim frames, barriers, pilot switches, lid interlocks, and more are available for enhanced safety and installation flexibility