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MERSEN FUSE A 130 URD 71 LLI 0350 A130URD71LLI0350
High-speed aR fuse with striker indication, ceramic body, slotted silver-plated copper blades, rated 350A at 1250VAC IEC and 1300VAC UL standards. Designed for semiconductor protection and industrial power electronics applications.
£96.41
Why Choose the Mersen J300664 High-Speed Semiconductor Fuse?
The Mersen J300664 is an industrial high-speed semiconductor fuse intended for the protection of sensitive power electronic components against damaging short-circuit currents. Manufactured by Mersen, it is designed for applications where rapid fault interruption and effective current limitation are required to protect valuable electrical equipment.
High-speed fuses help safeguard components such as IGBTs, thyristors, rectifiers and power diodes by limiting the electrical and thermal energy released during a fault. This rapid response can reduce secondary equipment damage, improve system reliability and minimise costly production downtime.
The Mersen J300664 is suitable for use in compatible industrial drives, converters, inverters, uninterruptible power supplies and specialist power control equipment. The precise current rating, voltage rating, fuse class and mounting arrangement should be confirmed from the fuse label, Mersen documentation or the original equipment specification before installation.
Key Advantages
- High-speed short-circuit protection for semiconductor devices.
- Rapid fault interruption helps minimise component damage.
- Current-limiting performance reduces damaging let-through energy.
- Suitable for industrial power conversion and control equipment.
- Supports improved equipment reliability and operational availability.
- Manufactured by established electrical protection specialist Mersen.
Key Features
- Mersen high-speed semiconductor fuse technology.
- Designed for rapid operation during short-circuit conditions.
- Suitable for protecting IGBTs, thyristors, rectifiers and power diodes.
- Current-limiting construction helps reduce fault energy.
- Industrial-grade design for demanding electrical environments.
- Suitable for OEM equipment and maintenance replacement applications.
- Designed for installation in a correctly matched fuse mounting system.
- Manufacturer reference clearly identified as J300664.
Reliable Protection for Industrial Power Electronics
High-speed semiconductor fuses are engineered to operate more rapidly than conventional general-purpose fuses. During a short-circuit fault, they restrict the energy transferred to vulnerable semiconductor components, helping prevent extensive thermal and electrical damage.
Correct fuse selection is essential for reliable protection. The electrical ratings, operating class, dimensions, connection style and breaking capacity of the Mersen J300664 must match the requirements of the protected circuit and the original equipment manufacturer.
Typical Applications
- Variable speed and variable frequency drives.
- Industrial motor control systems.
- Power converters and rectifier assemblies.
- Industrial inverter systems.
- Uninterruptible power supplies.
- Battery energy storage equipment.
- Renewable energy power conversion systems.
- Industrial power supplies and automation equipment.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 1250 V | |
| Item number | J300664 | |
| Catalogue No | A130UD71LLI350 | |
| Description | Square Body High-Speed Fuse Protistor® Size 71 aR 1250VAC IEC 1300VAC UL 350A With Striker Slotted Blades long | |
| EAN/UPC Code | 3605340331837 | |
| Rated voltage AC UL | 1300 V | |
| Rated voltage AC IEC | 1250 V | |
| Ampere Rating | 350 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 71 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 178 kA²s | |
| Melting I2t | 22 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 126 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | Slotted Blades | |
| Product Width | 51 mm | |
| Product Length | 157.4 mm | |
| Product Height | 56.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.62 kg | |
| Sell Pack Width | 155 mm | |
| Sell Pack Length | 165 mm | |
| Sell Pack Height | 60 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.54 kg | |
| Power Dissipation at Rated Current Value | 80 W |
Frequently Asked Questions
What is the Mersen J300664 used for?
The Mersen J300664 is intended to provide high-speed short-circuit protection for semiconductor devices installed in industrial power electronic equipment.
Which components can the J300664 help protect?
It may be used in compatible applications containing sensitive components such as IGBTs, thyristors, rectifiers and power diodes.
Why is a high-speed fuse required for semiconductor equipment?
A high-speed fuse interrupts fault currents rapidly and limits the energy reaching sensitive semiconductor components, helping reduce the risk of extensive equipment damage.
Where is the Mersen J300664 commonly installed?
It may be installed in industrial drives, converters, inverters, UPS systems, power supplies and other compatible power conversion equipment.
Can the J300664 replace another semiconductor fuse?
Replacement is appropriate only when the current rating, voltage rating, fuse characteristic, breaking capacity, dimensions and mounting arrangement match the equipment manufacturer’s requirements.
Trusted by Industrial Engineers Worldwide
Mersen high-speed semiconductor fuses are used in industrial power electronic systems where rapid fault interruption, effective current limitation and dependable component protection are essential.
