Wöhner 31904 D02 locking cap (utility version) for E18 screw fuse systems, rated 400 V AC and 250 V DC, designed to restrict access to D02 fuse links.
£39.03
The Wöhner 31904 is a D02 locking cap (utility version) designed for D02 / E18 screw fuse systems. It provides a secure method of preventing unauthorised removal or replacement of D02 fuse links, making it ideal for utility installations, industrial power distribution systems and electrical switchboards where controlled access is required.
Manufactured from durable, halogen-free plastic, the locking cap is suitable for use on 400 V AC and 250 V DC D02 fuse installations. Its robust construction ensures reliable long-term performance while helping maintain the integrity and safety of fuse protection systems.
The Wöhner 31904 is supplied as the utility (EVU) version, making it particularly suitable for electricity distribution networks and installations where fuse access must be restricted to authorised personnel.
The Wöhner 31904 locking cap is designed to prevent unauthorised access to D02 fuse links while maintaining compliance with IEC fuse system standards. It is widely used in utility infrastructure, industrial facilities and commercial electrical installations where controlled fuse access is essential for operational safety.
Its precision-moulded construction provides a secure fit on compatible D02 fuse holders without affecting the electrical characteristics of the installation, offering dependable long-term protection in demanding environments.
| Manufacturer | Wöhner |
|---|---|
| Model | 31904 |
| Product type | Locking cap |
| Version | Utility (EVU) |
| Fuse size | D02 / E18 |
| Rated voltage (AC) | 400 V |
| Rated voltage (DC) | 250 V |
| Material | Plastic |
| Halogen-free | Yes |
| Power dissipation | 0 W |
| Maximum operating temperature | 55°C |
| Standards | IEC 60269-1, IEC 60269-3 |
| Pack quantity | 36 |
| EAN | 4021267319045 |
It is a D02 locking cap that prevents unauthorised removal or replacement of D02 fuse links in compatible fuse holders.
The locking cap is designed for D02 / E18 screw fuse systems.
The Wöhner 31904 is rated for 400 V AC and 250 V DC.
The utility version is intended for installations where access to fuse links should be restricted to authorised personnel using the appropriate locking key.
Each pack contains 36 locking caps.
Wöhner fuse accessories are trusted by utility providers, panel builders and industrial engineers for delivering secure, standards-compliant and reliable protection across low voltage power distribution systems.
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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...