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MERSEN FUSE 600V 300A CLASS J HS FUSE HSJ300
High-speed Class J blade fuse rated for 600VAC and 500VDC at 300A, providing rapid fault clearing and robust circuit protection.
£309.99
Why Choose the Mersen HSJ300 High Speed Class J Fuse?
The Mersen HSJ300 is a premium Class J high speed semiconductor fuse engineered to provide both branch circuit protection and advanced protection for sensitive 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 industrial power electronics and motor control systems.
Designed for demanding industrial environments, the HSJ300 rapidly clears fault currents to help protect diodes, SCRs, GTOs, IGBTs, solid state relays and other semiconductor components from costly damage. Its blade terminal construction enables secure installation in compatible Class J fuse holders and disconnect switches while delivering dependable protection under high fault conditions.
With a 300 A current rating, 600 V AC and 500 V DC ratings, the Mersen HSJ300 is well suited to variable frequency drives, soft starters, power converters, industrial control panels and OEM automation equipment requiring fast acting overcurrent protection.
Key Advantages
- High speed Class J semiconductor protection fuse.
- 300 A current rating for demanding industrial 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.
- Blade terminal construction for secure installation in Class J fuse holders.
Key Features
- Mersen Amp-Trap® HSJ Series.
- 300 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.
- High interrupting capacity for industrial electrical systems.
- Blade terminal design for heavy-duty installations.
Reliable Protection for Industrial Power Electronics
The Mersen HSJ300 is specifically designed to minimise the effects of short circuits and overcurrent faults in semiconductor-based equipment. Its fast acting characteristic helps reduce thermal stress on valuable electronic components, improving equipment reliability while reducing maintenance costs and unplanned downtime.
Combining branch circuit compliance with semiconductor protection simplifies electrical system design and provides dependable protection for modern automation equipment, motor drives 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.
Technical Specifications
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| Current | 300 A | |
|---|---|---|
| Voltage | 600 V | |
| Fuse Type | UL class | |
| Item number | HSJ300 | |
| Description | Fuse HSJ - Class J - High-Speed 600VAC 500VDC 300A Blade Amp-Trap® | |
| EAN/UPC Code | 782001329686 | |
| Rated voltage AC UL | 600 V | |
| Rated voltage DC UL | 500 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 300 A | |
| AC or DC | AC/DC | |
| Fuse Class | Class J | |
| Speed/Characteristic | High Speed | |
| Mounting | Clip | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Connection/Terminal Material | Brass | |
| Connection/Terminal Type | Blade | |
| Product Diameter | 54 mm | |
| Product Length | 181.1 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 0.8528 kg | |
| Sell Pack Width | 53.8 mm | |
| Sell Pack Length | 53.8 mm | |
| Sell Pack Height | 184.1 mm | |
| Product group | Low Voltage UL/CSA Fuses | |
| Body/Insulating Material | GMG | |
| Product Weight | 0.8119 kg | |
| HS Code | 85361090 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen HSJ300 used for?
The HSJ300 provides high speed overcurrent protection for semiconductor devices while also meeting Class J branch circuit protection requirements.
What is the current rating of the HSJ300?
The fuse has a 300 A current rating.
What voltage is the HSJ300 rated for?
The fuse is rated for 600 V AC and 500 V DC.
Which equipment can this fuse protect?
It is commonly used to protect variable frequency drives, SCRs, IGBTs, diodes, soft starters, solid state relays and other power semiconductor devices.
Is the HSJ300 suitable for industrial automation?
Yes. It is widely used in industrial automation, motor control, power conversion and machine building applications requiring rapid semiconductor protection.
Trusted for Industrial Circuit Protection
Mersen Amp-Trap® HSJ Series fuses are trusted by engineers worldwide for delivering fast fault interruption, dependable semiconductor protection and reliable branch circuit performance in demanding industrial electrical systems.
