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MERSEN FUSE 9 URD 73 EF 1000 PC73UD90V10CEF
High-speed aR-class fuse designed for semiconductor protection with integrated striker indication and open slot blade terminals, rated for 1000A and 1000VAC.
£193.57
Why Choose the Mersen F300638 High-Speed Fuse?
The Mersen F300638 is a specialist high-speed semiconductor protection fuse designed to protect sensitive power electronic components against damaging short-circuit currents. Manufactured for demanding industrial electrical systems, it provides the rapid fault interruption required by equipment containing IGBTs, thyristors, diodes, rectifiers and other semiconductor devices.
Mersen high-speed fuses are engineered to provide low let-through energy and effective current limitation. By restricting the electrical and thermal energy passed to protected components during a fault, the F300638 helps reduce the risk of extensive equipment damage, improve system reliability and minimise unplanned downtime.
The F300638 is suitable for power conversion, motor control and industrial automation equipment, including variable frequency drives, converters, inverters and uninterruptible power supplies. Its exact electrical rating, utilisation category, terminal arrangement and dimensions should be confirmed from the fuse markings or original equipment documentation before installation.
Key Advantages
- High-speed fuse designed for semiconductor protection.
- Rapid short-circuit interruption helps protect sensitive power electronics.
- Low let-through energy reduces electrical and thermal stress.
- Current-limiting operation helps minimise equipment damage during faults.
- Suitable for systems containing IGBTs, thyristors, diodes and rectifiers.
- Robust construction for demanding industrial environments.
- Suitable for OEM equipment, maintenance and replacement applications.
Key Features
- Mersen high-speed fuse technology.
- Designed specifically for industrial power electronic equipment.
- Fast response to severe short-circuit currents.
- Low I²t characteristics for enhanced semiconductor protection.
- Suitable for power conversion and motor control systems.
- Industrial construction for dependable operation.
- Compatible with a correctly rated fuse holder or mounting assembly.
- Manufacturer reference clearly identified as F300638.
Reliable Protection for Industrial Power Electronics
Power semiconductor devices can suffer permanent damage within milliseconds when exposed to excessive fault current. High-speed fuses such as the Mersen F300638 are designed to operate significantly faster than conventional general-purpose fuse links, limiting the amount of damaging energy that reaches the protected components.
Correct fuse coordination is essential for dependable protection. Before installing the F300638, engineers should confirm its rated current, rated voltage, breaking capacity, utilisation category, I²t values, terminal configuration and physical dimensions against the requirements of the original equipment.
Typical Applications
- Variable frequency drives and industrial motor controllers.
- Power converters and rectifier systems.
- Industrial inverter equipment.
- Uninterruptible power supply systems.
- Soft starters and high-power motor drives.
- Renewable energy power conversion equipment.
- Industrial automation and production machinery.
- Protection of IGBT, thyristor and diode modules.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 900 V | |
| Item number | F300638 | |
| Catalogue No | PC73UD90V10CEF | |
| Description | Square Body High-Speed Fuse Protistor® Size 73 aR 900VAC IEC 1000VAC UL 1000A With Striker Open Slot Blades | |
| EAN/UPC Code | 3605340331431 | |
| Rated voltage AC UL | 1000 V | |
| Rated voltage AC IEC | 900 V | |
| Ampere Rating | 1000 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 73 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 1920 kA²s | |
| Melting I2t | 370 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 | 73 mm | |
| Product Length | 149.4 mm | |
| Product Height | 78.5 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 1.11 kg | |
| Sell Pack Width | 110 mm | |
| Sell Pack Length | 180 mm | |
| Sell Pack Height | 80 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 1.11 kg | |
| Power Dissipation at Rated Current Value | 174 W | |
| HS Code | 85361090 |
Frequently Asked Questions
What is the Mersen F300638 used for?
The Mersen F300638 is used to protect sensitive semiconductor devices and industrial power electronic equipment against damaging short-circuit currents.
Which components can the F300638 protect?
It is intended for equipment containing components such as IGBTs, thyristors, diodes, rectifiers and power semiconductor modules.
Is the F300638 a general-purpose fuse?
No. It is a specialist high-speed fuse intended primarily for semiconductor and power electronic protection rather than general cable overload protection.
Where is this fuse commonly installed?
It may be installed in variable frequency drives, converters, inverters, UPS systems, soft starters and other industrial power electronic equipment.
What should be checked before installing the F300638?
The current rating, voltage rating, breaking capacity, fuse characteristic, dimensions and terminal arrangement should be checked against the original equipment requirements and the markings on the fuse.
Trusted Semiconductor Protection from Mersen
Mersen high-speed fuses are used by electrical engineers, machine builders and maintenance professionals to protect valuable semiconductor equipment and support dependable operation in demanding industrial power systems.
