The HSJ90 fuse delivers rapid, reliable protection for sensitive power electronics, supporting both 600VAC and 500VDC applications at up to 90 amps. Its high interrupting rating and fast-acting design ensure minimal equipment downtime and secure operation in demanding industrial environments.
£140.94
The Mersen HSJ90 is a high-performance Class J high speed semiconductor fuse designed to combine dependable branch circuit protection with low let-through energy for sensitive power electronic components. Part of the proven Mersen Amp-Trap® HSJ Series, it provides Class J protection while helping safeguard semiconductor devices such as diodes, SCRs, GTOs and solid state relays.
Engineered for demanding industrial environments, the HSJ90 interrupts damaging fault currents rapidly to limit the thermal and electrical energy reaching protected equipment. This high speed performance can reduce the risk of semiconductor damage, costly repairs and unplanned production downtime in motor control and power conversion systems.
With a rated current of 90 A, voltage ratings of 600 V AC and 500 V DC, and an AC interrupting capacity of 200 kA, the Mersen HSJ90 is suitable for variable frequency drives, soft starters, rectifiers and industrial automation equipment. Its silver-plated copper blade terminals support secure clip-mounted installation in compatible Class J fuse holders.
The Mersen HSJ90 is designed to clear short-circuit currents before excessive fault energy can damage sensitive semiconductor devices. Its low I²t characteristic limits peak current and let-through energy, helping protect electronic switching components that may be more vulnerable to overcurrent conditions than conventional electrical equipment.
By combining Class J branch circuit performance and high speed semiconductor protection in a single fuse, the HSJ90 can simplify panel design and protective device coordination. It is particularly well suited to industrial motor drives, power conversion assemblies and electronically controlled machinery.
| Current | 90 A |
|---|---|
| Voltage | 600 V |
| Item number | HSJ90 |
| Description | Fuse HSJ - Class J - High-Speed 600VAC 500VDC 90A Blade Amp-Trap® |
| EAN/UPC Code | 782001329587 |
| Rated voltage AC UL | 600 V |
| Rated voltage DC UL | 500 V |
| Frequency (Hz) | 50/60 Hz |
| Ampere Rating | 90 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 | Silver-Plated Copper |
| Connection/Terminal Type | Blade |
| Product Diameter | 27 mm |
| Product Length | 117.6 mm |
| Sell Pack Quantity | 5 EA |
| Sell Pack Weight | 0.5625 kg |
| Sell Pack Width | 136.7 mm |
| Sell Pack Length | 152.4 mm |
| Sell Pack Height | 26.9 mm |
| Product group | Low Voltage UL/CSA Fuses |
| Body/Insulating Material | GMG |
| Product Weight | 0.1075 kg |
| HS Code | 85361090 |
| Country of Manufacture | Mexico |
The HSJ90 provides high speed overcurrent protection for power semiconductor devices while also delivering Class J branch circuit protection.
The Mersen HSJ90 has a rated current of 90 A.
The fuse is rated for circuits operating at up to 600 V AC or 500 V DC.
The HSJ90 has an AC interrupting capacity of 200 kA, making it suitable for industrial systems with high available fault currents.
The fuse uses silver-plated copper blade terminals and is installed in a compatible clip-mounted Class J fuse holder, fused switch or other approved electrical equipment.
Mersen Amp-Trap® HSJ fuses are widely selected by automation engineers, panel builders and equipment manufacturers requiring dependable branch circuit protection and rapid fault interruption for sensitive industrial power electronics.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...