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MERSEN FUSE CC6,621 CP GRB 27.60 40 Q076305
Mersen Q076305 Protistor high-speed cylindrical semiconductor fuse-link with a 40 A current rating, 660 V DC IEC voltage rating, 50 kA interrupting capacity, 27 x 60 mm gR fuse format and integrated striker.
£71.90
Why Choose the Mersen Q076305 High-Speed Semiconductor Fuse?
The Mersen Q076305 is a high-performance Protistor® high-speed cylindrical fuse-link designed to protect sensitive power semiconductor components against damaging short-circuit currents. Identified by catalogue number FD27GB66V40T, it forms part of Mersen’s 27 × 60 mm gR (gRB) range developed for demanding DC power and railway auxiliary applications.
This fuse-link provides rapid, current-limiting fault interruption with low let-through energy, helping to minimise electrical and thermal damage to protected semiconductor devices. Its low I²t characteristics, reduced power losses and extended operating life make it suitable for modern DC equipment requiring faster protection than conventional industrial fuse-links can provide.
With a rated current of 40 A, an IEC voltage rating of 660 V DC and a compact 27 × 60 mm cylindrical format, the Mersen Q076305 provides dependable protection for railway systems, converters, rectifiers and industrial DC circuits. Its integrated striker provides clear fuse-operation indication for easier maintenance and fault identification.
Key Advantages
- High-speed fuse-link designed for semiconductor protection.
- 40 A rated current for demanding DC power circuits.
- 660 V DC IEC voltage rating.
- Low I²t performance helps minimise damage to protected components.
- 50 kA DC interrupting capacity supports reliable fault clearance.
- Integrated mechanical striker simplifies fuse-status identification.
Key Features
- Mersen Protistor® semiconductor fuse range.
- FD27GB66V40T catalogue number.
- 40 A rated current.
- 660 V DC rated voltage.
- gR operating class with gRB design characteristics.
- Compact 27 × 60 mm cylindrical fuse-link format.
- Fast-acting and current-limiting performance.
- Integrated mechanical striker indication.
- Silver-plated copper ferrule terminals.
- RoHS-compliant ceramic construction.
Reliable Protection for Modern DC Equipment
Power semiconductor devices can be permanently damaged by short-circuit currents that develop within milliseconds. High-speed fuse-links such as the Mersen Q076305 interrupt these faults rapidly, limiting the energy reaching sensitive components such as diodes, thyristors, rectifiers and power conversion assemblies.
The Mersen Protistor® DC range is developed to meet the protection requirements of modern DC equipment. Its low I²t characteristics, reduced watt losses and suitability for elevated operating temperatures support dependable performance in railway, industrial conversion and auxiliary power systems.
Typical Applications
- Railway power circuits.
- Railway auxiliary electrical systems.
- Industrial DC power supplies.
- Power converters and rectifiers.
- Semiconductor protection circuits.
- Battery charging and energy systems.
Technical Specifications
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| Device Type | Fuse link | |
|---|---|---|
| Fuse Type | Cylindrical, Semiconductor | |
| Fuse Size | 27x60 mm | |
| Fuse Class | gR | |
| Current | 40 A | |
| Voltage | 660 V | |
| Manufacturer | Mersen | |
| Series | Protistor® 27 × 60 gR (gRB), 660 VDC | |
| Model | Q076305 | |
| Catalogue number | FD27GB66V40T | |
| Alternative reference | CC6,621 CP GRB 27.60/40 | |
| Product type | High-speed cylindrical semiconductor fuse-link | |
| Operating class | gR | |
| Design characteristic | gRB | |
| Rated current | 40 A | |
| Rated voltage | 660 V DC | |
| Maximum interrupting capacity | 50 kA DC | |
| Electrical system | DC | |
| Fuse size | 27 × 60 mm | |
| Body type | Cylindrical | |
| Body material | Ceramic | |
| Mounting type | Clip mounting | |
| Terminal type | Ferrule | |
| Terminal material | Silver-plated copper | |
| Indication system | Yes | |
| Indicator type | Mechanical striker | |
| EAN / UPC | 3605340016437 | |
| RoHS compliant | Yes | |
| Weight | Approx. 0.08 kg | |
| HS Code | 85361050 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen Q076305 used for?
The Mersen Q076305 provides high-speed short-circuit protection for sensitive semiconductor devices used in railway, industrial and auxiliary DC power circuits.
What is the current rating of the Q076305?
The fuse-link has a rated current of 40 A.
What voltage is the Mersen Q076305 rated for?
The Q076305 has an IEC rated operating voltage of 660 V DC.
What is the interrupting capacity of the Q076305?
The fuse-link has a maximum interrupting capacity of 50 kA DC.
Does the Q076305 include an operating indicator?
Yes. It includes an integrated mechanical striker that indicates when the fuse-link has operated.
Trusted for Critical Semiconductor Protection
Mersen Protistor® high-speed fuse-links are widely used in demanding DC power systems where rapid fault interruption, low let-through energy and reliable semiconductor protection are essential.
