Wöhner 31351 Mersen Class J time-delay cylindrical fuse link rated at 8 A, 600 V AC and 500 V DC, with a 21 × 57 mm format and high interrupting capacity for industrial circuit protection.
£31.79
The Wöhner 31351 is a high-quality Class J time-delay cylindrical fuse link designed to provide dependable overload and short-circuit protection in demanding industrial electrical systems. Manufactured by Mersen for the Wöhner product range, it is particularly suitable for circuits that experience temporary inrush currents during the start-up of motors, transformers and other electrical equipment.
Rated at 8 A, the Wöhner 31351 is suitable for operating voltages up to 600 V AC and 500 V DC. Its time-delay characteristic helps prevent nuisance fuse operation during normal short-duration current surges while maintaining effective protection against sustained overloads and damaging fault currents.
The compact 21 × 57 mm Class J format enables installation in compatible 30 A frame Class J fuse holders. Its robust porcelain, halogen-free construction and high interrupting capacity make it a reliable choice for industrial control panels, machinery, switchboards and power distribution equipment.
The Wöhner 31351 is engineered to tolerate brief, non-damaging current surges while responding to sustained overloads and short-circuit conditions. This allows equipment with normal start-up current demands to operate without unnecessary fuse replacement, while still providing dependable protection when a genuine electrical fault occurs.
When installed in an appropriately rated Class J fuse holder, the fuse is suitable for UL feeder circuits above 250 V. Its high interrupting capacity helps safely isolate severe fault currents, supporting reliable operation in industrial control and power distribution systems.
| Current | 8 A |
|---|---|
| Manufacturer | Wöhner |
| Fuse manufacturer | Mersen |
| Model | 31351 |
| Manufacturer part number | 31351000 |
| Product type | Cylindrical fuse link |
| Fuse class | Class J |
| Frame size | Class J 30 A |
| Operating characteristic | Time delay |
| Type number | AJT |
| Rated current | 8 A |
| Rated voltage AC | 600 V |
| Rated voltage DC | 500 V |
| Rated frequency | 50 / 60 Hz |
| AC short-circuit current rating | 200 kA |
| DC short-circuit current rating | 100 kA |
| Dimensions (W × H × D) | 21 × 57 × 21 mm |
| Material | Porcelain |
| Halogen-free | Yes |
| Standards | UL 248-8, UL 248-1 |
| Approval | UL |
| UL file | E2137 |
| GTIN / EAN | 4021267313517 |
| ECLASS 14.0 | 27142002 |
| ETIM classification | EC002704 |
| Pack quantity | 10 |
| Weight | Approx. 50 g per fuse |
The Wöhner 31351 is a Class J time-delay fuse link used to protect industrial electrical circuits against sustained overloads and short circuits while tolerating temporary inrush currents.
The fuse link has a rated current of 8 A.
The Wöhner 31351 is rated for applications up to 600 V AC and 500 V DC.
No. It has a time-delay characteristic, enabling it to withstand brief start-up currents while protecting against sustained overloads and short circuits.
It is designed for compatible Class J 30 A frame fuse holders that accept 21 × 57 mm cylindrical fuse links.
Wöhner Class J fuse links are trusted by panel builders, OEM manufacturers and industrial electrical engineers for delivering reliable overcurrent protection in demanding control and power distribution applications.
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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...