Why Choose the Mersen HSJ50 High Speed Class J Fuse?
The Mersen HSJ50 is a premium Class J high speed semiconductor fuse designed to deliver both branch circuit protection and rapid protection for sensitive power semiconductor devices. As part of the trusted Mersen Amp-Trap® HSJ Series, it combines the low let-through energy (I²t) of a semiconductor fuse with the performance of a UL Listed Class J fuse, making it an ideal choice for industrial automation, motor control and power conversion equipment.
Engineered for demanding industrial environments, the HSJ50 rapidly clears fault currents to minimise damage to valuable components including diodes, SCRs, GTOs, IGBTs and solid state relays. Its compact ferrule construction enables straightforward installation into compatible Class J fuse holders while providing dependable protection and high interrupting capacity.
With a rated current of 50 A, 600 V AC and 500 V DC ratings, the Mersen HSJ50 is ideally suited for variable frequency drives, soft starters, industrial control panels and power conversion equipment requiring fast acting overcurrent protection.
Key Advantages
- High speed Class J semiconductor protection fuse.
- 50 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.
- Helps protect diodes, SCRs, GTOs, IGBTs and solid state relays.
- Compact ferrule design for installation in Class J fuse holders.
Key Features
- Mersen Amp-Trap® HSJ Series.
- 50 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.
- Ferrule terminal construction for clip-mounted fuse holders.
Reliable Protection for Industrial Power Electronics
The Mersen HSJ50 is specifically designed to minimise the effects of short circuits and severe overcurrent events in semiconductor-based equipment. Its fast acting characteristic helps reduce thermal and electrical stress on expensive electronic components, improving equipment reliability while reducing maintenance costs and downtime.
By combining branch circuit compliance with semiconductor protection, the HSJ50 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.
