High-performance Protistor® fuse with fast-acting gR characteristic, 690VAC rating, 315A current, integrated striker indication, and open slot blade terminals for industrial semiconductor protection.
£217.69
The Mersen Q301337 is an industrial high-speed semiconductor protection fuse designed to safeguard sensitive power electronic components against damaging short-circuit currents. Manufactured by Mersen for demanding electrical applications, it is intended for circuits containing devices such as diodes, thyristors, rectifiers and insulated-gate bipolar transistors.
Unlike conventional general-purpose fuses, high-speed semiconductor fuses are engineered to interrupt fault currents rapidly. This current-limiting performance helps reduce peak current and thermal energy transferred to connected equipment, protecting valuable semiconductor devices and helping minimise unplanned downtime.
The Mersen Q301337 is suitable for industrial power conversion and automation equipment, including variable speed drives, rectifiers, inverters, uninterruptible power supplies and renewable energy systems. Its precise electrical ratings, utilisation category, terminal arrangement and dimensions should be confirmed against the product label or official Mersen technical documentation before specification, installation or replacement.
Power semiconductor components can be permanently damaged within a fraction of a second when exposed to excessive fault current. High-speed fuses are designed to interrupt these currents rapidly, helping limit peak current, thermal stress and the total energy transferred into sensitive electronic devices.
The Mersen Q301337 is intended for installations where a standard general-purpose fuse may not operate quickly enough to protect semiconductor equipment. Correct fuse coordination is essential, and any replacement should match the equipment manufacturer's specified current, voltage, breaking capacity, operating characteristic and connection arrangement.
| Item number | Q301337 |
|---|---|
| Catalogue No | PC72GB69V315EF |
| Description | Square Body High-Speed Fuse Protistor® Size 72 gR 690VAC IEC 315A With Striker Open Slot Blades |
| EAN/UPC Code | 3605340339925 |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 315 A |
| RoHS Compliant | Yes |
| AC or DC | AC |
| Speed/Characteristic | gR |
| Fuse Size | 72 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 100 kA²s |
| Melting I2t | 17 kA²s |
| AC Max I.R./Breaking Capacity | I1: 150 kA |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Silver-Plated Copper |
| Connection/Terminal Type | Open Slot Blades |
| Product Width | 59 mm |
| Product Length | 149.4 mm |
| Product Height | 63 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 2.274 kg |
| Sell Pack Width | 157 mm |
| Sell Pack Length | 205 mm |
| Sell Pack Height | 80 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.758 kg |
| Power Dissipation at Rated Current Value | 57 W |
| HS Code | 85361090 |
| Country of Manufacture | France |
The Mersen Q301337 is used to protect sensitive semiconductor components and industrial power electronic equipment against damaging short-circuit currents.
It is intended for the protection of power semiconductor components such as diodes, thyristors, rectifiers and IGBTs.
No. It is a high-speed semiconductor protection fuse designed to interrupt fault currents more rapidly than a conventional general-purpose fuse.
The replacement should match the complete Q301337 reference together with the original current rating, voltage rating, breaking capacity, operating characteristic and connection type.
It is typically installed in industrial drives, rectifiers, converters, UPS equipment and other electrical assemblies containing sensitive power semiconductor devices.
Mersen high-speed semiconductor fuses are used across industrial power electronic systems to provide rapid fault interruption and dependable protection for valuable semiconductor components.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...