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MERSEN FUSE CC4,421 CP GLB 14.51 25 FD14GB44V25T
Mersen J075724 Protistor high-speed cylindrical semiconductor fuse rated at 25 A and 440 V DC, featuring a gLB characteristic, striker indication and compact 14 x 51 mm construction.
£15.66
Why Choose the Mersen J075724 Protistor® High-Speed Fuse?
The Mersen J075724 is a high-performance Protistor® cylindrical semiconductor fuse designed to protect sensitive power electronic components against damaging overload and short-circuit currents. Rated at 25 A and 440 V DC, it provides rapid fault interruption to help limit the thermal and electrical energy transferred to semiconductor devices.
Part of the Mersen Protistor® 14 × 51 mm gLB series, the J075724 combines a compact cylindrical format with an extremely high interrupting rating. Its high-speed operating characteristic makes it suitable for protecting diodes, thyristors, rectifiers and other semiconductor components that can be damaged before conventional protective devices have time to respond.
The fuse includes an integrated striker indicator that provides mechanical indication when the fuse has operated and can support compatible remote signalling arrangements. Its clip-mounted design enables straightforward installation in suitable fuse holders within industrial converters, UPS equipment, railway auxiliary systems and motor control applications.
Key Advantages
- High-speed gLB semiconductor protection characteristic.
- 25 A rated current for power electronic circuits.
- 440 V DC voltage rating for industrial DC systems.
- 100 kA interrupting rating for dependable fault clearance.
- Integrated striker provides clear fuse-operation indication.
- Compact cylindrical design supports simple installation and replacement.
Key Features
- Mersen Protistor® high-speed fuse series.
- 25 A rated current.
- 440 V DC rated operating voltage.
- gLB semiconductor protection characteristic.
- 14 × 51 mm cylindrical fuse format.
- Integrated striker indication mechanism.
- Ferrule connections for compatible clip-mounted fuse holders.
- High interrupting capability for demanding fault conditions.
- Designed specifically for power semiconductor protection.
- RoHS compliant.
High-Speed Protection for Power Electronic Equipment
Power semiconductor devices can be permanently damaged by fault energy before conventional circuit protection has time to operate. The Mersen J075724 is engineered to interrupt damaging currents rapidly, helping reduce the electrical and thermal stress imposed on diodes, thyristors, rectifiers and other sensitive semiconductor assemblies.
Its gLB operating characteristic provides high-speed protection against overload and short-circuit conditions. Combined with its compact dimensions and integrated striker, the fuse offers dependable protection and convenient fault indication within industrial power conversion and automation equipment.
Typical Applications
- Industrial power converters.
- Rectifiers and inverter systems.
- Uninterruptible power supply equipment.
- Railway power and auxiliary circuits.
- Reduced-voltage motor starters.
- Industrial automation power supplies.
- Protection of diodes, thyristors and semiconductor modules.
Technical Specifications
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| Device Type | Fuse link | |
|---|---|---|
| Fuse Type | Cylindrical, Semiconductor | |
| Fuse Size | 14x51 mm | |
| Current | 25 A | |
| Voltage | 440 V | |
| Manufacturer | Mersen | |
| Series | Protistor® 14 × 51 gLB 440 V DC | |
| Model | J075724 | |
| Catalogue number | FD14GB44V25T | |
| Product type | High-speed cylindrical semiconductor fuse | |
| Rated current | 25 A | |
| Rated voltage | 440 V DC | |
| Current type | DC | |
| Operating characteristic | gLB | |
| Fuse size | 14 × 51 mm | |
| Interrupting rating | Up to 100 kA DC | |
| Mounting type | Clip mounted | |
| Connection type | Ferrule | |
| Indication system | Yes | |
| Indicator type | Striker | |
| Protection application | Power semiconductors | |
| Standard | IEC high-speed fuse-link design | |
| Compliance | RoHS | |
| HS Code | 85361050 | |
| Country of Manufacture | Tunisia |
Frequently Asked Questions
What is the Mersen J075724 used for?
The J075724 is a high-speed cylindrical fuse designed to protect power semiconductors and associated electronic equipment against overload and short-circuit currents.
What is the current rating of the J075724?
The Mersen J075724 has a rated current of 25 A.
What voltage is this fuse rated for?
The fuse is rated for operation in DC circuits at up to 440 V DC.
What does the gLB characteristic mean?
The gLB characteristic identifies a high-speed fuse designed to provide full-range protection for power semiconductor devices against overload and short-circuit currents.
What does the integrated striker do?
The striker provides mechanical indication when the fuse has operated and may be used with compatible signalling or switching accessories.
Trusted by Power Electronics Engineers Worldwide
Mersen Protistor® fuses are widely selected for semiconductor protection applications, providing rapid fault interruption, dependable indication and reliable performance within demanding industrial power systems.
