Wöhner 31284 AMBUS Panel single-pole holder for 21 × 57 mm Class J cylindrical fuses, rated at 30 A and 600 V AC with a 50 mm² box terminal and DIN rail mounting.
£33.04
The Wöhner 31284 is a robust single-pole holder for Class J cylindrical fuses, designed to provide secure fuse mounting and dependable overcurrent protection in industrial electrical systems. Part of the Wöhner AMBUS® Panel range, it is suitable for panel builders, machine manufacturers and engineers requiring a reliable fuse holder for North American Class J fuse applications.
Designed for 21 × 57 mm Class J fuse links, the Wöhner 31284 combines compact DIN rail mounting with a large box terminal capable of accepting substantial conductor sizes. Its practical design supports straightforward installation, convenient maintenance and efficient use of space inside industrial control panels and switchgear assemblies.
With a rated current of 30 A and an operating voltage of up to 600 V AC, this single-pole fuse holder is suitable for protecting branch circuits, machinery, power supplies and automation equipment. Its compliance with the UL 248-8 Class J fuse standard makes it particularly suitable for equipment intended for international and North American markets.
Class J fuses provide effective overcurrent and short-circuit protection for industrial electrical circuits. The Wöhner 31284 securely retains the fuse link and provides a dependable electrical connection, helping protect machinery, power distribution equipment and automation components against damaging fault currents.
The single-pole modular design allows multiple holders to be positioned together when protection is required across several phases or circuits. Its large terminal capacity and DIN rail format make it particularly practical for OEM control panels, industrial switchboards and electrical installations built for international markets.
| Current | 30 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | Wöhner |
| Series | AMBUS® Panel |
| Model | 31284 |
| Full part number | 31284 000 |
| Product type | Holder for cylindrical Class J fuses |
| Fuse class | Class J |
| Fuse size | 21 × 57 mm |
| Number of poles | 1 |
| Rated current | 30 A |
| Rated voltage | 600 V AC |
| Fuse standard | UL 248-8 |
| Terminal type | Box terminal |
| Maximum conductor capacity | 50 mm² |
| Mounting type | DIN mounting rail |
| System | Panel |
| EAN | 4021267312848 |
| Approximate weight | 0.158 kg |
The holder is designed for Class J cylindrical fuse links measuring 21 × 57 mm.
The Wöhner 31284 has a rated current of 30 A.
The fuse holder is rated for electrical systems operating at up to 600 V AC.
It is designed for installation on a standard DIN mounting rail inside an electrical panel or switchgear assembly.
The integrated box terminal supports conductors with a cross-sectional area of up to 50 mm².
Wöhner fuse holders are widely specified by electrical panel builders, machinery manufacturers and industrial engineers for dependable circuit protection, practical installation and reliable performance in low-voltage power 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...