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1SCA105546R1001 ABB 250 A 3-Pole British Standard Switch Fuse
ABB OS250B03HP (1SCA105546R1001) is a 250 A three-pole British Standard switch fuse designed for reliable switching, isolation and fuse protection in industrial low-voltage power distribution systems.
£488.20
Why Choose the ABB OS250B03HP Switch Fuse?
The ABB OS250B03HP, product ID 1SCA105546R1001, is a robust 250 A three-pole British Standard 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 front-operated switch fuse has a three-pole configuration and is designed for British Standard B1–B3 fuse links. The OS250 platform provides high-performance switching in a compact base-mounted format, making it suitable for protected feeders, switchboards, distribution panels and industrial machinery supplies.
With a rated operational current of 250 A, the OS250 platform provides AC-23 operational power ratings of 140 kW at 400 V, 170 kW at 500 V and 250 kW at 690 V. Its robust electrical characteristics and British Standard fuse compatibility make the OS250B03HP a practical solution for three-phase circuits requiring reliable high-current switching and protection.
Key Advantages
- Heavy-duty 250 A switch fuse for industrial power distribution.
- Three-pole configuration for three-phase electrical systems.
- Designed for British Standard B1–B3 fuse links.
- High switching capability for demanding industrial loads.
- Combines switching, electrical isolation and fuse protection within a single device.
- Base-mounted construction for integration into switchboards and control panels.
- ABB OS design developed for dependable low-voltage power distribution.
Key Features
- ABB OS Fuse Switches series.
- 250 A rated operational current.
- Three-pole construction.
- British Standard fuse system.
- Compatible with B1–B3 fuse links.
- Front-operated switch fuse design.
- Rated for operation at up to 690 V AC.
- 140 kW AC-23 rating at 400 V.
- 170 kW AC-23 rating at 500 V.
- 250 kW AC-23 rating at 690 V.
- High electrical endurance for industrial switching duties.
- Suitable for switchboards, distribution panels and machinery installations.
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 engineered for demanding industrial switchboards, distribution panels and machinery installations. The OS250B03HP combines a 250 A three-pole configuration with British Standard B1–B3 fuse compatibility, making it well suited to substantial three-phase feeders and other high-current distribution circuits.
Typical Applications
- Industrial low-voltage distribution boards.
- Electrical switchboards and control panels.
- Three-phase feeder isolation and fuse protection.
- Industrial machinery power supplies.
- Motor and equipment distribution circuits.
- Commercial and industrial power distribution systems.
Technical Specifications
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| Mounting Type | Base / panel | |
|---|---|---|
| Series | OS Fuse Switches | |
| Product ID | 1SCA105546R1001 | |
| ABB product group | 311021-OS Fuse Switches | |
| Product type | British Standard switch fuse | |
| Rated operational current | 250 A | |
| Number of poles | 3 | |
| Fuse standard | British Standard | |
| Fuse size | B1–B3 | |
| Rated operational voltage | up to 690 V AC | |
| Rated operational power AC-23 at 400 V | 140 kW | |
| Rated operational power AC-23 at 500 V | 170 kW | |
| Rated operational power AC-23 at 690 V | 250 kW | |
| Rated insulation voltage | 1000 V | |
| Rated impulse withstand voltage | 12 kV | |
| Rated short-time withstand current | 8 kA for 1 s | |
| Operation | Front operated | |
| Mounting type | Base mounting | |
| Main circuit connection | Bolt connection | |
| Terminal bolt size | M10 × 30 | |
| Standard | IEC 60947-3 |
Frequently Asked Questions
What is the ABB OS250B03HP used for?
The ABB OS250B03HP is a 250 A three-pole British Standard switch fuse used for switching, electrical isolation and fuse protection in industrial and commercial low-voltage power distribution systems.
What is the current rating of the ABB OS250B03HP?
The OS250B03HP has a rated operational current of 250 A.
How many poles does the OS250B03HP have?
The OS250B03HP has three poles and is designed for three-phase electrical distribution applications.
Which fuse sizes are compatible with the OS250B03HP?
The OS250B03HP uses the British Standard fuse system and is designed for B1–B3 fuse links.
What applications are suitable for the ABB OS250B03HP?
The OS250B03HP is suitable for industrial switchboards, distribution panels, machinery supplies and three-phase feeders requiring 250 A switching, isolation and fuse protection.
Trusted by Electrical Professionals Worldwide
ABB OS fuse switches provide reliable switching, isolation and fuse protection for demanding low-voltage electrical distribution applications, with British Standard configurations designed for industrial switchboards, control panels and machinery installations.
