Why Choose the Mersen J300618 Protistor® High-Speed Semiconductor Fuse?
The Mersen J300618 is a premium Protistor® Size 72 aR square body high-speed semiconductor fuse engineered to provide exceptional protection for modern power conversion equipment. Designed specifically to safeguard sensitive semiconductor devices, it delivers ultra-fast fault interruption and outstanding current limiting to protect IGBTs, thyristors, diodes and rectifiers from damaging short-circuit currents.
As part of Mersen's trusted Protistor® semiconductor fuse range, the J300618 features silver-plated contact surfaces, solidified sand technology for controlled arc characteristics and an integrated striker for remote indication. Its robust construction ensures dependable performance in demanding industrial environments while helping reduce equipment downtime and maintenance costs.
Rated at 280 A with a 1250 V AC IEC / 1300 V AC UL voltage rating, the J300618 is ideal for industrial drives, converters, inverters, UPS systems, renewable energy installations and other high-power semiconductor applications requiring reliable circuit protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 280 A current rating for industrial power electronics.
- 1250 V AC IEC / 1300 V AC UL voltage rating.
- Excellent current-limiting characteristics reduce fault energy.
- Integrated striker for remote monitoring and indication.
- Designed to maximise semiconductor reliability and equipment uptime.
Key Features
- Mersen Protistor® Size 72 aR series.
- 280 A rated current.
- 1250 V AC (IEC) / 1300 V AC (UL) rated voltage.
- Square body fuse with open slot 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 72 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.
