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MERSEN FUSE A 130 URD 71 LLI 0450 A130URD71LLI0450
Engineered for critical power electronics protection, this fuse offers rapid response to overcurrent faults in demanding industrial environments. With a high interrupting capacity at 1250VAC (IEC) and 1300VAC (UL), it ensures reliable safeguarding of semiconductors and power conversion equipment.
£103.64
Why Choose the Mersen L300666 Protistor® High-Speed Fuse?
The Mersen L300666, catalogue number A130UD71LLI450, is a Protistor® Size 71 square body high-speed semiconductor fuse developed to provide advanced protection for modern power electronic equipment. With its ultra-fast aR operating characteristic, it safeguards IGBTs, thyristors, diodes and other semiconductor devices against damaging short-circuit currents while maintaining low let-through energy.
Designed for demanding industrial applications, the L300666 features long slotted blade (LLI) terminals with an integrated striker indicator, silver-plated contact surfaces and precision die-cut fuse elements embedded in solidified sand for dependable arc control, low I²t values and high interrupting performance.
Rated at 450 A, with 1250 V AC IEC and 1300 V AC UL voltage ratings, the Mersen L300666 is ideally suited for high-power drives, renewable energy converters, UPS systems, industrial rectifiers and other semiconductor-based power conversion equipment.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 450 A current rating.
- 1250 V AC IEC / 1300 V AC UL voltage capability.
- Low I²t characteristics minimise semiconductor damage.
- 126 kA AC breaking capacity.
- Long slotted blade (LLI) terminals for secure bolted installation.
- Integrated striker supports optional remote indication.
- Silver-plated contacts for long service life.
Key Features
- Mersen Protistor® Size 71 series.
- Catalogue number: A130UD71LLI450.
- 450 A rated current.
- 1250 V AC IEC / 1300 V AC UL.
- aR ultra-fast operating characteristic.
- Long slotted blade (LLI) terminals.
- Integrated striker indication.
- Square body ceramic construction.
- Silver-plated contact surfaces.
Designed for High-Power Semiconductor Protection
Protistor® semiconductor fuses are specifically engineered to interrupt extremely high fault currents before costly semiconductor devices are damaged. Their low energy let-through characteristics improve equipment reliability while reducing maintenance costs across demanding industrial power conversion systems.
The robust square body construction, silver-plated contacts, precision fuse elements and integrated striker indicator make the Mersen L300666 an ideal solution for protecting high-voltage drives, converters and renewable energy systems.
Typical Applications
- High-power variable speed drives.
- Industrial power converters.
- Renewable energy inverters.
- Large UPS systems.
- Industrial rectifiers.
- Traction power equipment.
- IGBT, thyristor and diode protection.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 1250 V | |
| Item number | L300666 | |
| Catalogue No | A130UD71LLI450 | |
| Description | Square Body High-Speed Fuse Protistor® Size 71 aR 1250VAC IEC 1300VAC UL 450A With Striker Slotted Blades long | |
| EAN/UPC Code | 3605340331851 | |
| Rated voltage AC UL | 1300 V | |
| Rated voltage AC IEC | 1250 V | |
| Ampere Rating | 450 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 71 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 378 kA²s | |
| Melting I2t | 47 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 | 95 W | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen L300666 used for?
The Mersen L300666 is an ultra-fast semiconductor fuse designed to protect IGBTs, thyristors, diodes and other sensitive semiconductor devices against short-circuit faults.
What is the current rating of the L300666?
The Mersen L300666 has a rated current of 450 A.
What voltage is the fuse rated for?
The fuse is rated for 1250 V AC (IEC) and 1300 V AC (UL).
What type of terminals does the L300666 use?
The fuse features long slotted blade (LLI) terminals with an integrated striker indicator for secure installation and optional remote monitoring.
What applications is the L300666 suitable for?
It is commonly used in industrial drives, renewable energy converters, UPS systems, rectifiers and other high-power semiconductor applications.
Trusted Protection for Critical Power Electronics
Mersen Protistor® high-speed semiconductor fuses are trusted worldwide by OEMs, panel builders and industrial maintenance professionals for reliable protection of high-performance power electronic systems.
