Why Choose the Mersen J300687 Protistor® High-Speed Semiconductor Fuse?
The Mersen J300687 is a premium Protistor® Size 73 aR square body high-speed semiconductor fuse designed to provide advanced protection for modern power electronic equipment. Engineered specifically for safeguarding sensitive semiconductor devices, it delivers ultra-fast fault interruption and exceptional current limiting to protect IGBTs, thyristors, rectifiers and power diodes against damaging short-circuit currents.
Part of Mersen's internationally recognised Protistor® Size 73 range, the J300687 incorporates silver-plated contact surfaces, solidified sand construction for controlled arc performance and an integrated striker for remote indication. These features help maximise equipment reliability while reducing maintenance requirements and costly downtime.
With a 700 A rated current and a 1200 V AC IEC / 1300 V AC UL voltage rating, the J300687 is ideally suited to industrial drives, converters, inverters, UPS systems, renewable energy installations and other high-power semiconductor applications.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 700 A current rating for demanding industrial applications.
- 1200 V AC IEC / 1300 V AC UL voltage rating.
- Excellent current-limiting characteristics minimise fault energy.
- Integrated striker for remote indication and monitoring.
- Designed to maximise semiconductor reliability and equipment uptime.
Key Features
- Mersen Protistor® Size 73 aR series.
- 700 A rated current.
- 1200 V AC (IEC) / 1300 V AC (UL) rated voltage.
- Square body fuse with long slotted blade connections.
- Integrated striker indicator.
- Silver-plated contact surfaces.
- Solidified sand construction for controlled arc performance.
- Designed for protection of IGBTs, SCRs, diodes and rectifiers.
Reliable Protection for Industrial Power Electronics
High-speed semiconductor fuses are engineered to interrupt fault currents before excessive thermal or electrical energy reaches sensitive semiconductor devices. Their low let-through energy helps improve equipment reliability while reducing maintenance costs and unplanned downtime.
The Mersen Protistor® Size 73 range is trusted worldwide by OEMs, panel builders and industrial engineers for demanding power conversion applications where dependable semiconductor protection is essential.
Typical Applications
- Variable frequency drives.
- Industrial motor control systems.
- Power converters and inverters.
- UPS systems.
- Renewable energy installations.
- Battery energy storage systems.
- Industrial power supplies.
- Semiconductor protection circuits.
