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MERSEN FUSE 11 URD 71 TT F 0500 11URD71TTF0500
High-speed fuse with 500A rating, flush ends, striker indication, and metric threads for bolted mounting. Certified IEC 1100VAC and UL 1200VAC.
£102.27
Why Choose the Mersen F300523 Protistor® High-Speed Fuse?
The Mersen F300523 is a specialist high-speed semiconductor protection fuse designed to protect sensitive power electronic components against damaging short-circuit currents. Developed for demanding industrial electrical systems, it provides the rapid fault interruption required by equipment containing semiconductor devices such as IGBTs, thyristors, diodes and rectifier modules.
As part of Mersen’s established Protistor® semiconductor fuse range, the F300523 is engineered to deliver low let-through energy and dependable current limitation. These characteristics help reduce thermal and electrical stress on valuable power electronics, supporting improved equipment reliability and reduced unplanned downtime.
The F300523 is suitable for industrial motor drives, power converters, inverters, uninterruptible power supplies and automation systems. Its robust construction makes it an effective replacement component for applications requiring fast-acting semiconductor protection. The fuse rating, terminal arrangement and physical dimensions should be checked against the equipment documentation before installation.
Key Advantages
- High-speed semiconductor protection fuse for industrial power electronics.
- Rapid fault interruption helps protect sensitive electronic components.
- Low let-through energy limits electrical and thermal stress.
- Suitable for protecting IGBTs, thyristors, diodes and rectifier assemblies.
- Current-limiting performance helps reduce equipment damage during faults.
- Robust construction for demanding industrial installations.
- Suitable for OEM equipment, maintenance and replacement applications.
Key Features
- Mersen high-speed fuse technology.
- Designed specifically for semiconductor protection.
- Fast-acting response to severe short-circuit currents.
- Low I²t characteristics for enhanced component protection.
- Industrial construction for reliable long-term performance.
- Suitable for power conversion and motor control equipment.
- Compatible with an appropriately rated fuse holder or mounting assembly.
- Manufacturer reference clearly identified as F300523.
Reliable Protection for Industrial Power Electronics
Semiconductor devices can suffer permanent damage within milliseconds when exposed to excessive fault current. High-speed fuses such as the Mersen F300523 are designed to operate significantly faster than conventional general-purpose fuse links, limiting the energy that reaches the protected components.
Correct fuse coordination helps protect critical equipment while supporting safe and reliable system operation. Before fitting the F300523, engineers should verify the required current rating, voltage rating, breaking capacity, fuse class, terminal configuration and physical dimensions against the original equipment specifications.
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 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 | 1100 V | |
| Item number | F300523 | |
| Catalogue No | PC71UD11C500TF | |
| Description | Square Body High-Speed Fuse Protistor® Size 71 aR 1100VAC IEC 1200VAC UL 500A With Striker Flush ends metric threads | |
| EAN/UPC Code | 3605340329759 | |
| Rated voltage AC UL | 1200 V | |
| Rated voltage AC IEC | 1100 V | |
| Ampere Rating | 500 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 71 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 441 kA²s | |
| Melting I2t | 68 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 150 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Brass | |
| Connection/Terminal Type | Flush ends | |
| Product Width | 51 mm | |
| Product Length | 74 mm | |
| Product Height | 56.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.545 kg | |
| Sell Pack Width | 90 mm | |
| Sell Pack Length | 170 mm | |
| Sell Pack Height | 70 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.515 kg | |
| Power Dissipation at Rated Current Value | 90 W | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen F300523 used for?
The Mersen F300523 is used to protect sensitive semiconductor devices and industrial power electronic equipment against damaging short-circuit currents.
Which components can the F300523 protect?
It is suitable for equipment containing IGBTs, thyristors, diodes, rectifiers and power semiconductor modules.
Is the F300523 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 used in variable frequency drives, converters, inverters, UPS systems, soft starters and other industrial power electronic equipment.
What should be checked before installing the F300523?
The current rating, voltage rating, breaking capacity, fuse characteristic, dimensions and terminal arrangement should be checked against the equipment manufacturer’s requirements.
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.
