Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
1SCA123547R1001 ABB 125 A 3+N BS Switch Fuse
ABB OS125GB12N3P is a 125 A 3+N British Standard switch fuse for A2–A4 fuse links with a detachable neutral link integrated into the mechanism, supplied with a 161 mm shaft and OHB65J6 external handle.
£226.34
Why Choose the ABB OS125GB12N3P 125 A 3+N Switch Fuse?
The ABB OS125GB12N3P is a robust 125 A 3+N switch fuse designed for switching, isolation and fuse-based protection in low-voltage electrical distribution systems. Part of the ABB OS125 fuse switch range, it combines three fused phase poles with a dedicated neutral arrangement for industrial and commercial applications.
A key feature of the OS125GB12N3P is its N3 detachable neutral link integrated into the operating mechanism, meaning the neutral passes through the mechanism as part of the switching arrangement. The switch fuse uses the British Standard fuse system and is designed for A2–A4 fuse links with a maximum fuse diameter of 32 mm.
The OS125GB12N3P is front operated with its mechanism positioned between the poles and is supplied with a 161 mm operating shaft and ABB OHB65J6 external handle. Rated at 125 A, it provides a practical fused isolation solution for three-phase circuits where an integrated neutral link is required.
Key Advantages
- Heavy-duty 125 A 3+N switch fuse for low-voltage distribution.
- Detachable neutral link integrated into the mechanism.
- Designed for British Standard A2–A4 fuse links.
- Combines switching, isolation and fuse-based phase protection.
- Front-operated mechanism positioned between the poles.
- Supplied with a 161 mm shaft and OHB65J6 external handle.
- Suitable for three-phase installations requiring an integrated neutral switching arrangement.
Key Features
- ABB OS125 switch fuse.
- 125 A rated current.
- 3+N pole configuration.
- N3 detachable neutral link integrated into the operating mechanism.
- British Standard fuse system.
- Suitable for A2, A3 and A4 fuse links.
- Maximum fuse diameter of 32 mm.
- Front-operated construction.
- Operating mechanism positioned between the poles.
- 161 mm operating shaft included.
- OHB65J6 external operating handle included.
- Designed for professional switchboard and panel integration.
Integrated Neutral Operation and Fuse Protection
The ABB OS125GB12N3P combines three-phase fused switching with an integrated detachable neutral link. Its N3 configuration routes the neutral through the operating mechanism, providing a coordinated 3+N arrangement while the three phase conductors use appropriately selected British Standard fuse links for overcurrent and short-circuit protection.
The mechanism is positioned between the poles and operated from the front of the assembly. With the supplied 161 mm shaft and OHB65J6 external handle, the OS125GB12N3P can be integrated into a suitable enclosure or switchboard while providing convenient external control of the switching mechanism.
Typical Applications
- Industrial three-phase plus neutral distribution systems.
- Main and sub-distribution switchboards.
- Three-phase feeder switching and isolation.
- Industrial machinery and equipment supplies.
- Electrical control panels and distribution assemblies.
- Installations requiring British Standard fuse protection with an integrated neutral link.
Technical Specifications
| Series | OS125 |
|---|---|
| ABB order code | 1SCA123547R1001 |
| Product type | Switch fuse / fuse switch disconnector |
| ABB product group | 311021-OS Fuse Switches |
| Rated current | 125 A |
| Number of poles | 3+N |
| Phase arrangement | Three fused phase poles plus neutral |
| Neutral configuration | N3 detachable neutral link integrated into the mechanism |
| Fuse system | British Standard |
| Fuse size | A2–A4 |
| Maximum fuse diameter | 32 mm |
| Rated operational power AC-23 | 55 kW at 400 V, 75 kW at 500 V and 110 kW at 690 V |
| Operation | Front operated |
| Operating mechanism position | Between the poles |
| Operating shaft | 161 mm shaft included |
| Handle | ABB OHB65J6 external handle included |
Frequently Asked Questions
What is the ABB OS125GB12N3P used for?
The ABB OS125GB12N3P is a 125 A 3+N switch fuse designed for switching, isolation and fuse-based protection in three-phase low-voltage electrical systems with a neutral conductor.
What does N3 mean on the ABB OS125GB12N3P?
N3 identifies an ABB configuration with a detachable neutral link integrated into the operating mechanism, providing the neutral-through-mechanism arrangement used by the OS125GB12N3P.
What fuse links does the ABB OS125GB12N3P use?
The OS125GB12N3P uses the British Standard fuse system and accommodates A2–A4 fuse links with a maximum fuse diameter of 32 mm.
Where is the mechanism positioned on the ABB OS125GB12N3P?
The OS125GB12N3P is front operated with the operating mechanism positioned between the poles.
Does the ABB OS125GB12N3P include a handle and shaft?
Yes. The OS125GB12N3P is supplied with a 161 mm operating shaft and ABB OHB65J6 external handle for front operation through a suitable panel or enclosure.
Trusted ABB Fuse Switching Technology
ABB OS switch fuses combine dependable switching and isolation with British Standard fuse protection, with specialised neutral configurations available for low-voltage distribution systems requiring coordinated three-phase and neutral operation.
