1SCA022870R8910 ABB 250 A 4-Pole Side Operated Switch Fuse

Why Choose the ABB OS250BS40N2 Side Operated Switch Fuse?

The ABB OS250BS40N2, product ID 1SCA022870R8910, is a robust 250 A four-pole side operated switch fuse designed for reliable switching, isolation and fuse protection in industrial and commercial low-voltage electrical systems. As part of the ABB OS Fuse Switches range, it combines dependable load switching with fuse-based overcurrent and short-circuit protection for demanding power distribution applications.

This side operated switch fuse uses the British Standard fuse system and is designed for B1–B3 fuse links. Its four-pole construction incorporates a switched fourth pole with a solid link on the right side, while the operating mechanism is positioned on the right side. This configuration is particularly suitable for switchboard and panel layouts requiring side operation from the right.

With a rated operational current of 250 A at up to 690 V AC, the OS250BS40N2 provides AC-23 operational power ratings of 145 kW at 415 V, 170 kW at 500 V and 250 kW at 690 V. The switch fuse is supplied with its terminal bolt kit, while the operating handle and shaft are ordered separately, allowing the appropriate operating accessories to be selected for the enclosure design.

Key Advantages

• Heavy-duty 250 A side operated switch fuse for industrial power distribution.
• Four-pole configuration with a switched fourth pole and solid link.
• Right-side operating mechanism for suitable switchboard and panel layouts.
• Designed for British Standard B1–B3 fuse links.
• High switching capability for demanding industrial electrical loads.
• Terminal bolt kit supplied as standard.
• Handle and shaft selected separately to suit the installation.
• Combines switching, electrical isolation and fuse protection within a single device.

Key Features

• ABB OS Fuse Switches series.
• 250 A rated operational current.
• Four-pole construction.
• Side operated configuration.
• Operating mechanism positioned on the right side.
• British Standard B1–B3 fuse compatibility.
• Fourth pole positioned on the right side.
• Fourth pole is switched with a solid link.
• Rated for AC-20 to AC-23 duties at up to 690 V AC.
• 145 kW AC-23 rating at 415 V.
• 170 kW AC-23 rating at 500 V.
• 250 kW AC-23 rating at 690 V.
• 25 mm lug terminals for robust power connections.
• Handle and operating shaft are not included and must be ordered separately.

Reliable Switching and Fuse Protection

Switch fuses combine manual load switching and electrical isolation with the overcurrent and short-circuit protection provided by correctly selected fuse links. This enables downstream equipment and distribution circuits to be protected while providing a clearly defined means of isolation for operation, servicing and maintenance.

The ABB OS range is designed for industrial switchboards, distribution panels and machinery installations. The OS250BS40N2 combines a 250 A four-pole configuration with a right-side operating mechanism and British Standard B1–B3 fuse compatibility, making it particularly suitable for assemblies requiring side operation and dependable high-current fuse protection.

Typical Applications

• Industrial low-voltage distribution boards.
• Electrical switchboards and control panels.
• Four-pole feeder isolation and fuse protection.
• Industrial machinery power supplies.
• Motor and equipment distribution circuits.
• Commercial and industrial power distribution systems.