Wöhner 31357 Class J time-delay fuse link rated at 20 A, 600 V AC and 400 V DC for industrial circuit protection and feeder applications.
£31.79
The Wöhner 31357 is a premium Class J time-delay fuse link designed to provide dependable overload and short-circuit protection for industrial electrical systems. Manufactured by Mersen for Wöhner, it is engineered for use with compatible Class J fuse holders and busbar systems, delivering reliable protection for industrial machinery, switchgear and power distribution equipment.
Designed to comply with UL 248-8 and UL 248-1 standards, the Wöhner 31357 features a time-delay operating characteristic that allows temporary motor starting and transformer inrush currents without unnecessary fuse operation. This helps maximise equipment uptime while maintaining excellent fault protection.
With a 20 A current rating, 600 V AC operating voltage and a compact 21 × 57 mm Class J format, the Wöhner 31357 is ideal for industrial control panels, OEM machinery and feeder circuits requiring reliable circuit protection.
The Wöhner 31357 safely disconnects electrical circuits when overloads or fault currents exceed safe operating limits. Its high interrupting capacity helps minimise equipment damage while improving system safety and reliability in industrial installations.
The time-delay characteristic makes this fuse particularly suitable for motors, transformers and inductive loads that experience temporary inrush currents during normal operation, helping prevent unnecessary downtime while maintaining dependable circuit protection.
| Current | 20 A |
|---|---|
| Manufacturer | Wöhner |
| Fuse manufacturer | Mersen |
| Model | 31357 |
| Article number | 31357 000 |
| Product type | Class J time-delay fuse link |
| Rated current | 20 A |
| Rated voltage (AC) | 600 V |
| Rated voltage (DC) | 400 V |
| Frequency | 50 / 60 Hz |
| Operating characteristic | Time delay |
| Fuse class | Class J |
| Short-circuit current rating (AC) | 200 kA |
| Short-circuit current rating (DC) | 100 kA |
| Dimensions (W × H × D) | 21 × 57 × 21 mm |
| Material | Porcelain |
| Halogen free | Yes |
| Approximate unit weight | 0.05 kg |
| Pack quantity | 10 |
| Applicable standards | UL 248-8, UL 248-1 |
| EAN | 4021267313579 |
The Wöhner 31357 is a Class J time-delay fuse designed to protect industrial electrical circuits from overloads and short circuits.
This fuse has a rated current of 20 A.
The Wöhner 31357 is rated for 600 V AC and 400 V DC operation.
Time-delay fuses tolerate temporary inrush currents produced by motors and transformers while still providing dependable protection against sustained overloads and short circuits.
It is commonly installed in industrial control panels, switchgear, machinery and feeder circuits using compatible Class J fuse holders.
Wöhner Class J fuse links are trusted by electrical engineers, OEMs and panel builders worldwide for dependable protection of industrial machinery, power distribution systems and automation equipment.
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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...