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1SCA022860R4450 ABB 250 A 3-Pole Side-Operated Switch Fuse with Direct Handle
ABB OS250BS03K is a 250 A 3-pole side-operated British Standard switch fuse with a left-side mechanism and direct-mounted handle for reliable industrial switching, isolation and fuse protection.
£507.97
Why Choose the ABB OS250BS03K Side-Operated Switch Fuse?
The ABB OS250BS03K is a robust 250 A 3-pole side-operated switch fuse designed for reliable switching, isolation and fuse protection in industrial low-voltage electrical systems. Identified by ABB order code 1SCA022860R4450, this model belongs to the ABB OS switch fuse range and is designed for British Standard fuse links.
This specific OS250BS03K configuration features a side-operated mechanism positioned on the left together with a direct-mounted handle. This arrangement provides convenient local operation directly at the switch fuse and is particularly suitable for industrial switchgear layouts where side operation is preferred.
With a rated current of 250 A, three poles and compatibility with B1–B3 fuse sizes, the OS250BS03K provides dependable fused isolation at operational voltages up to 690 V AC. The direct-mounted black handle, operating shaft and terminal bolt kit are included, providing a practical complete assembly for industrial installation.
Key Advantages
- 250 A rated current for demanding industrial distribution circuits.
- 3-pole configuration suitable for three-phase systems.
- Combines switching, isolation and fuse protection in one assembly.
- Side-operated mechanism on the left for specialised switchgear layouts.
- Direct-mounted handle supplied as standard.
- Compatible with B1–B3 British Standard fuse links.
Key Features
- ABB OS250 switch fuse.
- 250 A rated current.
- 3-pole design.
- Side-operated configuration.
- 03 mechanism positioned on the left side.
- Direct-mounted handle included.
- Designed for B1–B3 British Standard fuse links.
- AC-20 to AC-23 operation up to 690 V AC.
- AC-23 rated operational power of 145 / 170 / 250 kW at 415 / 500 / 690 V AC.
- Base-mounted construction with lug terminals.
Direct Side-Operated Fused Isolation
Switch fuses combine manual circuit switching and isolation with fuse-based overcurrent and short-circuit protection. Correctly selected fuse links provide circuit protection, while the switching mechanism enables equipment and feeders to be positively disconnected for operation, servicing and maintenance.
The ABB OS250BS03K is specifically configured with its operating mechanism on the left and a direct-mounted handle. This design provides convenient local operation without requiring a separate enclosure-door operating arrangement, making it particularly useful in compatible industrial switchboards, machinery and distribution assemblies.
Typical Applications
- Industrial low-voltage distribution boards.
- Three-phase fused isolation circuits.
- Switchgear and switchboard assemblies.
- Industrial machinery power isolation.
- Fused feeder and distribution circuits.
- OEM and process-industry electrical systems.
Technical Specifications
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| Mounting Type | Base / panel | |
|---|---|---|
| Series | OS Switch Fuses | |
| ABB order code | 1SCA022860R4450 | |
| Product type | Side-operated switch fuse | |
| Rated current | 250 A | |
| Number of poles | 3 | |
| Fuse system | British Standard | |
| Fuse sizes | B1–B3 | |
| Operating mechanism | 03, left side | |
| Operation | Side operated | |
| Handle | Direct-mounted handle included | |
| Handle indication | TEST-ON-OFF | |
| Handle locking | Padlockable in OFF position | |
| Mounting | Base mounted | |
| Terminal type | Lug terminals | |
| Rated operational voltage | Up to 690 V AC | |
| AC-23 rated power at 415 V | 145 kW | |
| AC-23 rated power at 500 V | 170 kW | |
| AC-23 rated power at 690 V | 250 kW | |
| Weight | approx. 4.6 kg | |
| Application | Switching, isolation and fuse protection | |
| Product group | 311021 – OS Fuse Switches |
Frequently Asked Questions
What is the ABB OS250BS03K used for?
The ABB OS250BS03K is used for switching, circuit isolation and fuse protection in industrial three-phase low-voltage electrical systems.
What is the rated current of the OS250BS03K?
The OS250BS03K has a rated current of 250 A.
How many poles does the ABB OS250BS03K have?
The OS250BS03K is a 3-pole switch fuse designed for three-phase electrical circuits.
How is the OS250BS03K operated?
The OS250BS03K is side operated, with its 03 operating mechanism positioned on the left side and a direct-mounted handle supplied for local operation.
What fuse sizes does the OS250BS03K use?
The ABB OS250BS03K is designed for B1–B3 British Standard fuse links.
Trusted ABB Low-Voltage Switching Technology
ABB OS switch fuses combine dependable switching and isolation with fuse-based circuit protection, with side-operated models such as the OS250BS03K providing direct local operation for industrial switchgear, machinery and power-distribution systems.
