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MERSEN FUSE 6,9 GRB 71 EF 0400 PC71GB69V400EF
High-speed fuse designed for semiconductor protection at 690 V AC and 400 A with striker indication and open slot blades for bolted mounting.
£110.17
Why Choose the Mersen D301326 Protistor® High-Speed Fuse?
The Mersen D301326 (Catalogue No. PC71GB69V400EF) is a Protistor® Size 71 square body high-speed semiconductor fuse designed to provide full-range protection for sensitive power semiconductor devices. Featuring a gR operating characteristic, it protects both against overloads and short-circuit faults, making it ideal for demanding industrial power conversion applications.
Rated at 400A and 690VAC (IEC), the D301326 delivers outstanding current-limiting performance with a high breaking capacity of 150kA. Manufactured using pure silver fuse elements embedded in solidified sand, it provides low let-through energy to minimise damage to expensive semiconductor devices whilst ensuring reliable fault interruption.
The fuse features open slot blade terminals, an integrated mechanical striker indicator and a robust ceramic square body, making it suitable for industrial drives, power converters, renewable energy systems, UPS installations and other high-performance power electronic equipment.
Key Advantages
- Full-range gR semiconductor protection.
- Protects against both overloads and short-circuit faults.
- 400A continuous current rating.
- 690VAC IEC operating voltage.
- Excellent current-limiting performance.
- 150kA breaking capacity.
- Integrated striker indication.
- Manufactured by Mersen, a global leader in semiconductor protection.
Key Features
- Mersen Protistor® Size 71 semiconductor fuse.
- Manufacturer reference D301326.
- Catalogue number PC71GB69V400EF.
- gR full-range operating characteristic.
- Square body construction.
- Open slot blade terminals.
- Mechanical striker indicator.
- Silver-plated contacts.
- Ceramic insulated body.
- RoHS compliant.
Designed for Critical Semiconductor Protection
Protistor® gR semiconductor fuses are engineered to provide complete protection for power semiconductor devices by clearing both overload and short-circuit faults. Their low I²t performance significantly reduces thermal stress, helping extend equipment life and minimise downtime in demanding industrial installations.
The D301326 is widely suited to industrial power conversion equipment where dependable semiconductor protection is essential, including motor drives, converters, UPS systems and renewable energy installations.
Typical Applications
- Variable frequency drives.
- Industrial motor drives.
- Power converters.
- Rectifiers.
- Renewable energy inverters.
- UPS systems.
- Battery energy storage systems.
- Industrial automation equipment.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | gR | |
| Voltage | 690 V | |
| Item number | D301326 | |
| Catalogue No | PC71GB69V400EF | |
| Description | Square Body High-Speed Fuse Protistor® Size 71 gR 690VAC IEC 400A With Striker Open Slot Blades | |
| EAN/UPC Code | 3605340339710 | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 400 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | gR | |
| Fuse Size | 71 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 225 kA²s | |
| Melting I2t | 38.3 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 | 61 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen D301326 used for?
The Mersen D301326 is a high-speed gR semiconductor fuse designed to provide full-range protection for power semiconductor devices against overloads and short-circuit faults.
What are the voltage and current ratings?
The fuse is rated at 690VAC (IEC) with a continuous current rating of 400A.
What does the gR characteristic mean?
The gR characteristic provides full-range semiconductor protection, meaning the fuse protects against both overload and short-circuit conditions.
Does the fuse include an indicator?
Yes. The D301326 incorporates a mechanical striker indicator for local or remote fuse operation indication.
Which industries commonly use this fuse?
Typical applications include industrial drives, renewable energy systems, UPS equipment, rectifiers, converters and other power electronic installations.
Trusted by Industrial Engineers Worldwide
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, electrical engineers and panel builders to deliver dependable protection for critical power electronic systems operating in demanding industrial environments.
