Wöhner 31342 Mersen Class J time-delay cylindrical fuse link rated at 3 A, 600 V AC and 500 V DC for industrial circuit protection.
£31.79
The Wöhner 31342 is a premium Class J time-delay cylindrical fuse link designed to provide dependable overcurrent and short-circuit protection for industrial electrical installations. Manufactured by Mersen for the Wöhner product range, it is engineered for applications requiring reliable circuit protection while allowing temporary inrush currents during motor starting and equipment energisation.
Rated at 3 A, the Wöhner 31342 supports operating voltages up to 600 V AC and 500 V DC. Its time-delay operating characteristic reduces nuisance fuse operation while maintaining excellent protection against sustained overloads and high fault currents. The fuse complies with UL 248-8 and is intended for use in UL feeder circuits above 250 V.
The compact 21 × 57 mm Class J format allows installation in compatible Class J fuse holders within industrial control panels, switchboards and OEM machinery. Its porcelain, halogen-free construction provides excellent thermal and mechanical durability for demanding industrial environments.
The Wöhner 31342 is designed to withstand temporary current surges while responding rapidly to sustained overloads and short-circuit conditions. This makes it well suited to protecting control circuits, automation equipment, instrumentation and auxiliary power supplies that experience normal start-up inrush currents.
Installed in a compatible Class J fuse holder, the fuse provides dependable protection for industrial control systems while helping minimise unnecessary downtime caused by nuisance fuse operation.
| Current | 3 A |
|---|---|
| Manufacturer | Wöhner |
| Fuse manufacturer | Mersen |
| Model | 31342 |
| Alternative SKU | 31342000 |
| Product type | Cylindrical fuse link |
| Fuse class | Class J |
| Frame size | Class J 30 A |
| Operating characteristic | Time delay |
| Rated current | 3 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 |
| GTIN / EAN | 4021267313425 |
| Pack quantity | 10 |
| Weight | Approx. 50 g per fuse |
The Wöhner 31342 is a Class J time-delay fuse link used to protect industrial electrical circuits against overloads and short circuits while tolerating temporary inrush currents.
The fuse has a rated current of 3 A.
The Wöhner 31342 is rated for applications up to 600 V AC and 500 V DC.
No. It features a time-delay operating characteristic, allowing temporary inrush currents while still protecting against sustained overloads.
It is designed for compatible Class J fuse holders accepting 21 × 57 mm cylindrical fuse links.
Wöhner Class J fuse links are trusted by panel builders, OEM manufacturers and industrial electricians for delivering dependable overcurrent protection and reliable performance in demanding industrial electrical installations.
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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...