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31357 Wohner fuse link 20 A, 600 V AC, time delay, Class J
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.
£25.43
Why Choose the Wöhner 31357 Class J Fuse Link?
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.
Key Advantages
- Reliable Class J time-delay fuse link for industrial electrical protection.
- 20 A rated current suitable for machinery and feeder circuits.
- 600 V AC and 400 V DC ratings for demanding industrial applications.
- Time-delay characteristic reduces nuisance operation during equipment start-up.
- High 200 kA AC short-circuit current rating.
- Compatible with Wöhner Class J fuse holders and busbar systems.
Key Features
- Manufacturer: Wöhner.
- Fuse manufacturer: Mersen.
- Model: 31357.
- 20 A rated current.
- 600 V AC rated voltage.
- 400 V DC rated voltage.
- Time-delay operating characteristic.
- Compact 21 × 57 mm Class J fuse format.
Reliable Circuit Protection for Industrial Applications
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.
Typical Applications
- Industrial control panels.
- Motor and transformer protection.
- Power distribution systems.
- OEM machinery.
- Switchgear assemblies.
- UL feeder circuits above 250 V.
Technical Specifications
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| 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 |
Frequently Asked Questions
What is the Wöhner 31357 used for?
The Wöhner 31357 is a Class J time-delay fuse designed to protect industrial electrical circuits from overloads and short circuits.
What is the current rating of the Wöhner 31357?
This fuse has a rated current of 20 A.
What voltage ratings does this fuse support?
The Wöhner 31357 is rated for 600 V AC and 400 V DC operation.
Why is a time-delay fuse used?
Time-delay fuses tolerate temporary inrush currents produced by motors and transformers while still providing dependable protection against sustained overloads and short circuits.
Where is the Wöhner 31357 typically installed?
It is commonly installed in industrial control panels, switchgear, machinery and feeder circuits using compatible Class J fuse holders.
Trusted for Industrial Circuit Protection
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.
