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MERSEN FUSE 6,9 GRB 17 D08 /25 6,9GRB17D08/25
Why Choose the MERSEN FUSE 6,9 GRB 17 D08 /25 6,9GRB17D08/25?
Why Choose the Mersen Q220975 Protistor® Semiconductor Fuse?
The Mersen Q220975 is a high-speed Protistor® semiconductor fuse designed to provide dependable protection for sensitive power semiconductor devices used in industrial drives, converters, rectifiers and UPS systems. It forms part of Mersen's proven 17 × 49 mm gRB fuse range, delivering rapid fault interruption and excellent current-limiting performance for demanding industrial applications.
Featuring a gRB operating characteristic, the Q220975 provides full-range protection for semiconductor devices, helping protect IGBTs, thyristors, diodes and similar components against both overloads and short-circuit faults. Its advanced construction using silver fuse elements embedded in silica sand minimises let-through energy while providing reliable long-term performance.
With a 25 A rated current, a 690 V AC operating voltage and a compact 17 × 49 mm D08 (German Standard) body, the Mersen Q220975 is ideal for industrial automation, motor drives, power converters and OEM electrical equipment requiring reliable semiconductor protection.
Key Advantages
- High-speed Protistor® semiconductor protection fuse.
- 25 A rated current for industrial power electronics.
- 690 V AC voltage rating.
- gRB operating characteristic providing full-range semiconductor protection.
- Excellent current-limiting performance reduces fault energy.
- Compact 17 × 49 mm construction for easy replacement.
Key Features
- Mersen Protistor® semiconductor fuse series.
- 25 A rated current.
- 690 V AC rated voltage.
- gRB full-range semiconductor protection.
- 17 × 49 mm D08 (German Standard) body.
- High breaking capacity.
- Current-limiting fuse technology.
- Designed for industrial semiconductor protection.
Reliable Protection for Industrial Power Electronics
The Mersen Q220975 is engineered to interrupt fault currents extremely quickly, helping minimise electrical and thermal stress on semiconductor devices. Its high-speed performance improves equipment reliability while reducing maintenance costs and unplanned downtime in demanding industrial environments.
Its compact D08 format enables straightforward installation into compatible fuse holders, making it suitable for OEM machinery, industrial automation systems, power converters and motor drive equipment where dependable semiconductor protection is essential.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial converters and inverters.
- UPS systems.
- Rectifiers.
- Motor control equipment.
- Industrial automation and OEM machinery.
Technical Specifications
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| Device Type | Fuse link | |
|---|---|---|
| Fuse Type | D / D0 (Neozed/Diazed), Semiconductor | |
| Fuse Size | 17x49 mm | |
| Current | 25 A | |
| Voltage | 690 V | |
| Manufacturer | Mersen | |
| Series | Protistor® | |
| Model | Q220975 | |
| Product type | High-speed semiconductor fuse | |
| Rated current | 25 A | |
| Rated voltage | 690 V AC | |
| Operating class | gRB | |
| Body size | 17 × 49 mm | |
| Body style | D08 (German Standard) | |
| Protection | Full-range semiconductor protection | |
| Construction | Silver fuse elements with silica sand filling | |
| Mounting | Compatible 17 × 49 mm fuse holders |
Frequently Asked Questions
What is the Mersen Q220975 used for?
It provides full-range protection for semiconductor devices used in industrial drives, converters, rectifiers, UPS systems and other power electronic equipment.
What is the current rating of this fuse?
The Mersen Q220975 has a 25 A current rating.
What voltage is the Q220975 rated for?
It is rated for applications up to 690 V AC.
What does the gRB operating class mean?
The gRB operating characteristic provides full-range protection for semiconductor devices against both overload and short-circuit faults.
Where is this fuse commonly installed?
It is commonly installed in industrial drives, converters, rectifiers, UPS systems and other semiconductor-based power control equipment.
Trusted by Industrial Engineers Worldwide
Mersen Protistor® semiconductor fuses are trusted worldwide by electrical engineers and OEM manufacturers to provide reliable, high-speed protection for critical industrial power electronic systems.
