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MERSEN FUSE 6,9 GRB 71 EF 0500 PC71GB69V500EF
High-speed Protistor® fuse optimised for industrial and power electronic applications operating at 690VAC and up to 500A with striker indication and open slot blades.
£115.92
Why Choose the Mersen G301858 Protistor® High-Speed Fuse?
The Mersen G301858 (PC71GB69V500EF) is a premium square body high-speed semiconductor fuse from the Protistor® Size 71 gR series, engineered to provide full-range protection for modern power electronic equipment. Designed for demanding industrial applications, it protects sensitive semiconductor devices including IGBTs, thyristors, SCRs and power diodes against both overloads and short-circuit faults.
Manufactured using precision die-cut silver fuse elements embedded in solidified sand, the fuse delivers outstanding current limitation, low let-through energy and high interrupting capacity. Silver-plated contact surfaces and non-magnetic hardware provide dependable long-term performance, while the bolted EF terminal design ensures secure installation within industrial power systems.
With a 500 A current rating, 690 V AC IEC voltage rating and a gR full-range operating characteristic, the G301858 is ideally suited for industrial motor drives, UPS systems, renewable energy inverters, converters and other high-power semiconductor protection applications.
Key Advantages
- Full-range gR semiconductor protection fuse.
- 500 A current rating for demanding industrial applications.
- 690 V AC IEC rated voltage.
- Protects against both overloads and short-circuit faults.
- Excellent current limitation with low let-through energy.
- Robust square body construction for long service life.
Key Features
- Mersen Protistor® Size 71 gR series.
- Catalogue number: PC71GB69V500EF.
- 500 A rated current.
- 690 V AC IEC rated voltage.
- Square body ceramic fuse.
- EF bolted connection terminals.
- Silver-plated contacts with non-magnetic hardware.
- High interrupting capacity for industrial semiconductor protection.
Reliable Protection for Industrial Power Electronics
The Protistor® Size 71 gR range provides full-range semiconductor protection, safeguarding power electronic devices against both overload and short-circuit conditions. Its ultra-fast operation limits fault current and thermal energy, helping maximise equipment reliability while reducing maintenance costs and downtime.
The G301858 is widely used within industrial automation, renewable energy systems, UPS installations and power conversion equipment where dependable semiconductor protection is essential for safe operation.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- UPS and standby power systems.
- Renewable energy inverters.
- Power converters and rectifiers.
- Protection of IGBT, SCR, thyristor and diode modules.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | gR | |
| Voltage | 690 V | |
| Item number | G301858 | |
| Catalogue No | PC71GB69V500EF | |
| Description | Square Body High-Speed Fuse Protistor® Size 71 gR 690VAC IEC 500A With Striker Open Slot Blades | |
| EAN/UPC Code | 3605340347784 | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 500 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | gR | |
| Fuse Size | 71 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 460 kA²s | |
| Melting I2t | 78.1 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 150 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | Open Slot Blades | |
| Product Width | 51 mm | |
| Product Length | 133.4 mm | |
| Product Height | 56.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.6098 kg | |
| Sell Pack Width | 140 mm | |
| Sell Pack Length | 174 mm | |
| Sell Pack Height | 71 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.5366 kg | |
| Power Dissipation at Rated Current Value | 67 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen G301858 used for?
The G301858 is a high-speed semiconductor fuse designed to provide full-range protection for industrial power electronic equipment, including motor drives, converters, UPS systems and renewable energy installations.
What is the current rating of this fuse?
This fuse has a 500 A rated current.
What does the gR fuse characteristic mean?
A gR characteristic provides full-range protection, safeguarding semiconductor devices against both overloads and short-circuit faults.
What voltage is the G301858 rated for?
The fuse has a 690 V AC IEC rated operating voltage.
Where is this fuse typically installed?
It is commonly installed in industrial drives, power converters, UPS equipment, renewable energy systems and other high-power semiconductor protection applications.
Trusted for Industrial Semiconductor Protection
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, panel builders and industrial engineers for delivering dependable, high-speed protection for critical power electronic equipment.
