The BFB125A4 fuse-holder offers secure, reliable housing for BS-type fuses with a robust front-back configuration for easy installation and maintenance. Rated for 690VAC and 125A, it ensures safe operation in high-voltage applications.
£55.83
The Mersen J230146, catalogue number BFB125A4, is a high-quality British Standard fuse holder designed to provide dependable overcurrent protection for industrial and commercial low-voltage electrical systems. Manufactured by Mersen, this single-pole fuse holder is engineered for use with A4 BS88 fuse links, delivering reliable performance in demanding power distribution applications.
Featuring a front-back terminal configuration, the J230146 allows one conductor to enter from the front and the other from the rear, making it ideal for installations where panel layout or cable routing requires mixed-access wiring. The fully insulated polyamide construction complies with BS88-1 and BS88-6, while the shrouded terminals provide an IP2X classified touch-safe design that helps minimise accidental contact with live parts during fuse replacement.
Rated at 125 A with operating voltages up to 690 V AC and 460 V DC, the Mersen J230146 is ideally suited to switchboards, motor control centres, distribution panels and OEM electrical equipment. Its durable black housing and compact design provide long-term reliability in industrial environments.
The Mersen J230146 securely accommodates A4 BS88 fuse links while maintaining excellent electrical continuity and dependable circuit protection. Its robust insulated construction and touch-safe design help improve operator safety during installation and maintenance.
Designed for panel builders, electrical contractors and OEM manufacturers, this fuse holder delivers reliable long-term performance across industrial switchgear, power distribution equipment and machine control systems.
| Phase | Single Phase |
|---|---|
| Item number | J230146 |
| Catalogue No | BFB125A4 |
| Description | British Standard Fuse-Holder A4 Front-Back 690VAC Black |
| EAN/UPC Code | 3605340288001 |
| Rated voltage AC IEC | 690 V |
| Rated voltage DC IEC | 460 V |
| Ampere Rating | 125 A |
| RoHS Compliant | Yes |
| AC or DC | AC/DC |
| Fuse Size | A4 |
| Fuse Type/Class | BS |
| Design Details | Black |
| Number of Poles | 1-pole |
| Wiring range | 1-70mm² |
| Connection/Terminal Type | Front-Back |
| Torque Rating | 4 Nm |
| Housing Material | Polyamide |
| Installation Mounting | Bus Bar Installation |
| Product Width | 48.9 mm |
| Product Length | 97.8 mm |
| Product Height | 134 mm |
| Sell Pack Quantity | 1 EA |
| Sell Pack Weight | 0.716 kg |
| Sell Pack Width | 205 mm |
| Sell Pack Length | 155 mm |
| Sell Pack Height | 55 mm |
| Product group | Fuse Holders |
| Body/Insulating Material | Polyamide |
| Product Weight | 0.716 kg |
The J230146 is a British Standard fuse holder designed to mount A4 BS88 fuse links in industrial and commercial low-voltage electrical systems.
The fuse holder has a rated current of 125 A.
The Mersen J230146 is rated for 690 V AC and 460 V DC.
The fuse holder uses a front-back terminal configuration, allowing one cable to connect from the front and the other from the rear of the unit.
Yes. The fuse holder features an IP2X classified design with fully shrouded terminals to help reduce accidental contact with live components.
Mersen BS fuse holders are trusted by electrical engineers, panel builders and OEM manufacturers worldwide for delivering reliable, standards-compliant protection across industrial electrical distribution systems.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...
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...