Why Choose the MERSEN FUSE 600V 17-1/2A CLASS J HS FUSE HSJ17-1/2?
£44.91
The Mersen HSJ17-1/2 is a 17.5 A high-speed Class J fuse designed to provide branch-circuit protection and rapid fault interruption for sensitive power-electronic equipment. Part of the Mersen Amp-Trap® HSJ range, it combines the rejection-style dimensions of a Class J fuse with low let-through energy for improved semiconductor protection.
The HSJ17-1/2 is suitable for industrial circuits containing variable frequency drives, electronic motor controllers, rectifiers, inverters and solid-state components. Its current-limiting construction helps reduce peak fault current and thermal stress during short-circuit conditions, protecting equipment and helping minimise costly downtime.
Rated at 17.5 A, 600 V AC and 500 V DC, the Mersen HSJ17-1/2 provides a compact protection solution for industrial control panels and power-conversion equipment. It should be installed in a compatible Class J fuse holder or fuse block with suitable voltage, current and short-circuit ratings.
Power-semiconductor devices can be damaged by fault energy before a conventional general-purpose fuse has time to operate. The Mersen HSJ17-1/2 uses a high-speed fuse element and low-I²t design to interrupt severe faults rapidly, limiting the thermal and electrical energy transferred to connected components.
Its Class J construction also provides branch-circuit protection and rejection-style dimensional control. Correct fuse selection should consider the system voltage, continuous load current, temporary inrush current, available fault current and the protection recommendations supplied by the equipment manufacturer.
| Current | 2 A |
|---|---|
| Voltage | 600 V |
| Manufacturer | Mersen |
| Series | Amp-Trap® HSJ |
| Model / catalogue reference | HSJ17-1/2 |
| Product type | High-speed Class J fuse |
| Rated current | 17.5 A |
| Rated voltage AC | 600 V AC |
| Rated voltage DC | 500 V DC |
| Frequency | 50 / 60 Hz |
| Fuse class | Class J |
| Operating characteristic | High speed |
| Current limiting | Yes |
| Protection type | Branch-circuit and semiconductor protection |
| Mounting | Compatible Class J fuse holder or fuse block |
| Fuse holder included | No |
| HS Code | 85361050 |
| Country of Manufacture | Mexico |
The Mersen HSJ17-1/2 provides high-speed overcurrent and short-circuit protection for industrial branch circuits, drives, converters and sensitive semiconductor equipment.
The Mersen HSJ17-1/2 has a nominal current rating of 17.5 A.
The fuse is rated for applications operating at up to 600 V AC or 500 V DC.
No. It is a high-speed Class J fuse designed to limit fault energy and protect semiconductor devices more rapidly than a conventional time-delay fuse.
The fuse should be installed in a compatible Class J fuse holder or fuse block with electrical and mechanical ratings suitable for the application.
Mersen Amp-Trap® HSJ fuses are used by panel builders, equipment manufacturers and industrial engineers to provide dependable branch-circuit protection while limiting damaging fault energy in power-electronic systems.
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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...