Wöhner 31207 10 x 38 mm cylindrical semiconductor fuse link rated at 4 A, 690 V AC with gR operating class for industrial semiconductor protection.
£10.50
The Wöhner 31207 is a high-performance 10 × 38 mm cylindrical semiconductor fuse link designed to provide fast and dependable protection for sensitive power electronic equipment. Manufactured by Wöhner, this IEC-compliant fuse is specifically engineered to protect semiconductors including IGBTs, thyristors, rectifiers and power converters from overloads and short circuits.
Designed in accordance with IEC 60269-1 and IEC 60269-4, the Wöhner 31207 features a gR operating class, providing full-range protection for semiconductor devices. Its robust porcelain construction delivers excellent thermal stability, while the compact format enables easy installation in standard 10 × 38 mm fuse holders.
With a rated current of 4 A, a 690 V AC voltage rating and a high 200 kA breaking capacity, the Wöhner 31207 is ideal for industrial automation, variable speed drives, UPS equipment and power conversion systems requiring rapid fault protection.
The Wöhner 31207 is engineered to interrupt fault currents rapidly, protecting valuable semiconductor devices from excessive thermal and electrical stress. Its fast-acting gR characteristic minimises let-through energy, helping improve the reliability and service life of industrial power electronic equipment.
Its compact IEC-standard design enables straightforward installation into compatible fuse holders used in industrial control panels, servo systems, power converters and automation equipment where dependable semiconductor protection is essential.
| Current | 4 A |
|---|---|
| Manufacturer | Wöhner |
| Model | 31207 |
| Product type | Cylindrical semiconductor fuse link |
| Rated current | 4 A |
| Rated voltage | 690 V AC |
| Fuse size | 10 × 38 mm |
| Operating class | gR |
| Breaking capacity | 200 kA AC |
| Standards | IEC 60269-1 / IEC 60269-4 |
| Power dissipation | 1.1 W |
| Material | Porcelain |
| Halogen free | Yes |
| Dimensions (W × H × D) | 10 × 10 × 38 mm |
It is designed to protect semiconductor devices such as IGBTs, thyristors, rectifiers and power converters against overloads and short circuits.
The Wöhner 31207 has a 4 A rated current.
It is suitable for electrical systems operating up to 690 V AC.
The gR classification provides fast full-range protection specifically developed for semiconductor devices and sensitive power electronic equipment.
The Wöhner 31207 is designed for standard 10 × 38 mm IEC cylindrical fuse holders.
Wöhner semiconductor fuse links are trusted worldwide by panel builders, OEM manufacturers and automation engineers for reliable protection of sensitive power electronic equipment in demanding industrial environments.
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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...