ABB 1SEP204487R3700 XRG250BS-185/10-4P four-pole 250 A switch disconnector fuse for 500 V AC low-voltage electrical distribution systems with 185 mm busbar spacing.
£1,005.86
The ABB 1SEP204487R3700, also identified as the XRG250BS-185/10-4P, is a robust four-pole switch disconnector fuse designed for reliable circuit isolation and fuse protection in low-voltage electrical distribution systems. As part of the ABB SlimLine XR Gold series, it is engineered for industrial switchboards, distribution panels and other installations where dependable switching and protection are essential.
This switch disconnector fuse combines manual circuit isolation with overcurrent and short-circuit protection provided by compatible BS fuse links. Its horizontal busbar-mounted construction supports efficient panel layouts, while the clearly defined switch position helps maintenance personnel confirm whether the contacts are open or closed.
With a rated operational current of 250 A at 500 V AC, the XRG250BS-185/10-4P is suitable for demanding commercial and industrial power distribution applications. It is designed for four-pole systems with a 185 mm phase distance and 10 mm busbar thickness, providing compatibility with established low-voltage switchboard configurations.
Switch disconnector fuses provide a combination of visible circuit isolation and fuse-based overcurrent protection. When fitted with correctly selected fuse links, the ABB XRG250BS-185/10-4P helps protect cables, switchgear and connected equipment against damaging fault currents while allowing the circuit to be manually disconnected for servicing or maintenance.
The ABB SlimLine XR Gold design is developed for efficient integration into low-voltage distribution assemblies. Its busbar-mounted format helps maximise available switchboard space, while its four-pole configuration enables simultaneous switching of three phases and the neutral conductor where required by the installation design.
| Phase | Three Phase |
|---|---|
| Manufacturer | ABB |
| Series | SlimLine XR Gold |
| Model | XRG250BS-185/10-4P |
| Product ID | 1SEP204487R3700 |
| Product type | Switch disconnector fuse |
| Number of poles | 4 |
| Rated operational current | 250 A |
| Rated operational voltage | 500 V AC |
| Utilisation category | AC-22B |
| Rated insulation voltage | 1 kV |
| Rated impulse withstand voltage | 8 kV |
| Fuse system | British Standard |
| Fuse size | B2 |
| Busbar phase distance | 185 mm |
| Compatible busbar thickness | 10 mm |
| Protection rating | IP41 from the front |
| Terminal type | Bolt connection |
| Operating mode | Manual |
| Power loss at rated load | 70 W |
| Standard | IEC 60947-3 |
| Dimensions (W × H × D) | approx. 600 × 150 × 335 mm |
| Net weight | approx. 8.75 kg |
| EAN | 3800161651519 |
| Country of origin | Bulgaria |
The ABB 1SEP204487R3700 is used to provide manual circuit isolation and fuse protection in industrial and commercial low-voltage electrical distribution systems.
The switch disconnector fuse has a rated operational current of 250 A at a rated operational voltage of 500 V AC.
The XRG250BS-185/10-4P is designed for British Standard B2 fuse links. Fuse links must be selected according to the circuit design and required protection characteristics.
This model is designed for busbars with a 185 mm distance between phases and a 10 mm busbar thickness.
The four-pole configuration allows four conductors to be switched simultaneously, typically the three phase conductors and the neutral conductor in a three-phase electrical distribution system.
The front of the switch disconnector fuse has an IP41 protection rating when installed in accordance with the manufacturer’s requirements.
ABB SlimLine XR Gold switch disconnector fuses are specified for low-voltage distribution systems where reliable isolation, efficient switchboard integration and dependable fuse protection are required.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...