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31212 Wohner cylindr. fuse link 20 A
Wöhner 31212 10 x 38 mm cylindrical semiconductor fuse link rated at 20 A, 690 V AC with gR operating class for industrial semiconductor protection.
£8.40
Why Choose the Wöhner 31212 Cylindrical Semiconductor Fuse Link?
The Wöhner 31212 is a premium 10 × 38 mm cylindrical semiconductor fuse link designed to provide rapid 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 against overloads and short circuits.
Designed in accordance with IEC 60269-1 and IEC 60269-4, the Wöhner 31212 features a gR operating class, providing full-range protection for semiconductor devices. Its robust porcelain body offers excellent thermal performance, while the compact 10 × 38 mm format ensures compatibility with standard cylindrical fuse holders.
With a rated current of 20 A, a 690 V AC voltage rating and a high 200 kA breaking capacity, the Wöhner 31212 is ideally suited to industrial automation, variable frequency drives, servo systems, UPS equipment and power conversion applications where rapid fault interruption is essential.
Key Advantages
- Designed specifically for semiconductor protection.
- 20 A rated current for demanding power electronic applications.
- 690 V AC operating voltage for industrial installations.
- gR operating class provides fast full-range protection.
- 200 kA breaking capacity for dependable fault interruption.
- Compatible with standard 10 × 38 mm fuse holders.
Key Features
- Wöhner cylindrical semiconductor fuse link.
- 20 A rated current.
- 690 V AC rated voltage.
- 10 × 38 mm fuse size.
- gR utilisation category.
- 200 kA AC breaking capacity.
- Porcelain body with halogen-free construction.
- Manufactured to IEC 60269-1 and IEC 60269-4.
Fast Protection for Sensitive Power Electronics
The Wöhner 31212 is engineered to interrupt fault currents extremely quickly, helping to protect valuable semiconductor devices from thermal and electrical damage. Its fast-acting gR characteristic minimises let-through energy, improving equipment reliability while extending the service life of industrial power electronic systems.
Its compact IEC-standard construction enables straightforward installation into compatible fuse holders used in industrial control panels, converters, inverters, servo drives and automation equipment where reliable semiconductor protection is essential.
Typical Applications
- Variable frequency drives.
- Servo drive systems.
- Power converters and inverters.
- UPS systems.
- Industrial automation equipment.
- Semiconductor protection circuits.
Technical Specifications
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| Current | 20 A | |
|---|---|---|
| Manufacturer | Wöhner | |
| Model | 31212 | |
| Product type | Cylindrical semiconductor fuse link | |
| Rated current | 20 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 | 5.8 W | |
| Material | Porcelain | |
| Halogen free | Yes | |
| Dimensions (W × H × D) | 10 × 10 × 38 mm |
Frequently Asked Questions
What is the Wöhner 31212 used for?
It is designed to protect semiconductor devices such as IGBTs, thyristors, rectifiers and power converters against overloads and short circuits.
What is the current rating of this fuse?
The Wöhner 31212 has a 20 A rated current.
What voltage is this fuse designed for?
It is suitable for electrical systems operating up to 690 V AC.
What does the gR operating class mean?
The gR operating class provides fast full-range protection specifically developed for semiconductor devices and sensitive power electronic equipment.
Which fuse holders is this compatible with?
The Wöhner 31212 is designed for standard 10 × 38 mm IEC cylindrical fuse holders.
Trusted for Semiconductor Protection
Wöhner semiconductor fuse links are trusted by panel builders, OEM manufacturers and automation engineers for dependable protection of sensitive power electronic equipment in demanding industrial environments.
