Why Choose the Mersen FR14GR69V12 Protistor® High-Speed Fuse?
The Mersen FR14GR69V12 (Item No. D1017201) is a premium Protistor® high-speed cylindrical semiconductor fuse designed to provide full-range (gR) protection for sensitive semiconductor devices. Engineered specifically for power electronic applications, it protects inverters, UPS systems, variable frequency drives and other semiconductor equipment against both overloads and short-circuit faults while helping to maximise equipment reliability.
Manufactured in accordance with IEC 60269-1 and IEC 60269-4, this 14 × 51 mm cylindrical fuse combines exceptional current-limiting performance with low I²t characteristics, helping to minimise thermal stress on IGBTs, thyristors, SCRs, diodes and rectifiers. It is supplied without a striker indicator, making it suitable for installations where visual or remote indication is not required.
Rated at 12 A and 690 V AC IEC (700 V AC UL), the FR14GR69V12 is ideally suited to industrial automation, renewable energy systems, motor drives and power conversion equipment requiring dependable semiconductor protection.
Key Advantages
- Full-range gR semiconductor protection.
- 12 A current rating.
- 690 V AC IEC / 700 V AC UL rated voltage.
- Fast fault interruption protects expensive semiconductor devices.
- Low I²t reduces thermal stress.
- 160 kA breaking capacity for demanding industrial applications.
Key Features
- Mersen Protistor® Size 14 × 51 mm.
- 12 A rated current.
- 690 V AC IEC / 700 V AC UL voltage rating.
- gR operating class providing full-range semiconductor protection.
- No blown-fuse indicator.
- Ceramic body with silver-plated contacts.
- Current-limiting construction.
- RoHS compliant.
Reliable Protection for Semiconductor Equipment
The FR14GR69V12 rapidly interrupts fault currents before excessive thermal energy reaches sensitive semiconductor devices. Its low energy let-through helps maximise equipment life while reducing maintenance costs and production downtime.
Protistor® semiconductor fuses are widely specified for industrial drives, UPS systems, renewable energy installations, converters and other critical power electronic equipment where dependable semiconductor protection is essential.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial inverters.
- UPS systems.
- Power converters.
- Servo drives.
- Industrial automation equipment.
