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.
