Why Choose the Mersen HSJ80 High Speed Class J Fuse?
The Mersen HSJ80 is a high-performance Class J high speed semiconductor fuse engineered to provide dependable branch circuit protection alongside rapid protection for sensitive power semiconductor devices. As part of the proven Mersen Amp-Trap® HSJ Series, it combines the low let-through energy (I²t) of a semiconductor fuse with the branch circuit performance of a UL Listed Class J fuse, making it ideal for demanding industrial automation, motor control and power conversion applications.
Designed for high-performance industrial environments, the HSJ80 rapidly interrupts fault currents to minimise damage to diodes, SCRs, GTOs, IGBTs and solid state relays. Its blade terminal construction enables secure installation into compatible Class J fuse holders while providing excellent interrupting performance and reliable semiconductor protection.
With a rated current of 80 A, voltage ratings of 600 V AC and 500 V DC, and a high interrupting capacity, the Mersen HSJ80 is ideally suited for variable frequency drives, soft starters, industrial control panels and power conversion equipment requiring ultra-fast overcurrent protection.
Key Advantages
- High speed Class J semiconductor protection fuse.
- 80 A current rating for industrial power applications.
- 600 V AC and 500 V DC voltage ratings.
- Combines branch circuit protection with low I²t semiconductor protection.
- Protects diodes, SCRs, GTOs, IGBTs and solid state relays.
- Heavy-duty blade terminal construction for secure installation.
Key Features
- Mersen Amp-Trap® HSJ Series.
- 80 A rated current.
- 600 V AC / 500 V DC rated voltage.
- 50 / 60 Hz operation.
- Low I²t design for semiconductor protection.
- UL Listed Class J branch circuit protection.
- 200 kA AC / 100 kA DC interrupting rating.
- Blade terminals for clip-mounted fuse holders.
Reliable Protection for Industrial Power Electronics
The Mersen HSJ80 is specifically engineered to interrupt fault currents before excessive thermal energy can damage sensitive semiconductor devices. Its fast acting characteristic helps reduce thermal and electrical stress on expensive electronic components, improving system reliability while reducing maintenance costs and production downtime.
By combining branch circuit compliance with advanced semiconductor protection, the HSJ80 simplifies electrical panel design while providing dependable protection for modern industrial automation, motor control and power conversion systems.
Typical Applications
- Variable frequency drives (VFDs).
- Soft starters.
- Industrial motor controllers.
- Power converters and rectifiers.
- Solid state relays.
- Industrial automation and control panels.
