Wöhner 31905 DII utility locking cap for E27 screw fuse systems, rated 500 V AC/DC, designed to restrict access to DII fuse links.
£53.51
The Wöhner 31905 is a DII locking cap (utility version) designed for DII / E27 screw fuse systems. It provides a secure method of preventing unauthorised removal or replacement of DII fuse links, making it ideal for utility installations, industrial power distribution systems and electrical switchboards where controlled access is essential.
Manufactured for use on 500 V AC and 500 V DC DII fuse installations, the locking cap offers a robust solution for protecting fuse carriers while maintaining compliance with IEC standards. As it contains no live electrical parts, it requires no maintenance and delivers dependable long-term performance.
The Wöhner 31905 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 using the appropriate locking key. The matching utility key is Wöhner 31907.
The Wöhner 31905 locking cap is designed to prevent unauthorised removal or replacement of DII 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-engineered construction provides a secure fit on compatible DII fuse holders without affecting the electrical characteristics of the installation. The locking cap contains no live parts, making it a reliable and maintenance-free safety accessory for demanding environments.
| Manufacturer | Wöhner |
|---|---|
| Model | 31905 |
| Product type | Locking cap |
| Version | Utility (EVU) |
| Fuse size | DII / E27 |
| Rated voltage (AC) | 500 V |
| Rated voltage (DC) | 500 V |
| Power dissipation | 0 W |
| Weight | 1.7 kg/100 pieces |
| Standards | IEC 60269-1, IEC 60269-3 |
| Pack quantity | 20 |
| EAN | 4021267319052 |
| Matching accessory | Wöhner 31907 utility key |
It is a DII utility locking cap that prevents unauthorised removal or replacement of DII fuse links in compatible E27 fuse holders.
The locking cap is designed for DII / E27 screw fuse systems.
The Wöhner 31905 is rated for 500 V AC and 500 V DC.
The utility version is designed for use with the Wöhner 31907 utility key.
Each pack contains 20 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...