Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE A 130 URD 71 LLI 0200 A130URD71LLI0200
High-speed Protistor® fuse designed for semiconductor protection with 200A rating, 1250VAC IEC, 1300VAC UL, striker indication, and slotted blade terminals.
£86.05
Why Choose the Mersen F300661 Protistor® High-Speed Fuse?
The Mersen F300661 (catalogue number A130UD71LLI200) is a premium Protistor® square body high-speed semiconductor protection fuse designed to provide maximum protection for modern power electronic equipment. Engineered specifically for safeguarding IGBTs, thyristors, diodes and semiconductor modules, it delivers ultra-fast fault interruption while minimising damage caused by high fault currents.
As part of the trusted Mersen Protistor® Size 71 aR series, this fuse features low let-through energy (I²t), silver-plated contact surfaces and a robust square body construction filled with solidified sand for superior arc control. The integrated striker indicator allows remote indication or operation of an optional microswitch, simplifying maintenance and improving system monitoring.
Rated at 200 A with operating voltages of 1250 V AC (IEC) and 1300 V AC (UL), the F300661 is ideally suited for protecting industrial drives, power converters, renewable energy systems, UPS installations and other demanding semiconductor applications.
Key Advantages
- Ultra-fast aR semiconductor protection fuse for sensitive power electronics.
- 200 A current rating for industrial applications.
- 1250 V AC IEC / 1300 V AC UL voltage rating.
- 126 kA breaking capacity for outstanding fault interruption.
- Integrated striker indicator for simplified maintenance.
- Silver-plated contacts provide excellent conductivity and long service life.
- Designed to protect IGBTs, thyristors, diodes and semiconductor modules.
Key Features
- Mersen Protistor® Size 71 aR series.
- 200 A rated current.
- 1250 V AC (IEC) / 1300 V AC (UL).
- Ultra-fast acting aR characteristic.
- Square body ceramic fuse construction.
- Long slotted blade terminals.
- Integrated striker indication.
- Low I²t performance for superior semiconductor protection.
Reliable Protection for High-Power Electronics
The Mersen F300661 is designed to interrupt high fault currents before they can damage expensive semiconductor devices. Its ultra-fast operating characteristics and low energy let-through help maximise equipment reliability while reducing maintenance costs and unplanned downtime.
This Protistor® fuse is widely used throughout industrial automation, renewable energy systems and power conversion equipment where dependable protection of semiconductor devices is essential for safe, reliable operation.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor control systems.
- Power converters and rectifiers.
- Renewable energy inverter systems.
- UPS systems.
- Industrial automation equipment.
- Protection of IGBTs, thyristors and diodes.
- High-power power conversion equipment.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 1250 V | |
| Item number | F300661 | |
| Catalogue No | A130UD71LLI200 | |
| Description | Square Body High-Speed Fuse Protistor® Size 71 aR 1250VAC IEC 1300VAC UL 200A With Striker Slotted Blades long | |
| EAN/UPC Code | 3605340331806 | |
| Rated voltage AC UL | 1300 V | |
| Rated voltage AC IEC | 1250 V | |
| Ampere Rating | 200 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 71 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 38 kA²s | |
| Melting I2t | 4.7 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 | 54 W |
Frequently Asked Questions
What is the Mersen F300661 used for?
The F300661 is a high-speed semiconductor fuse designed to protect IGBTs, thyristors, diodes and other power electronic devices against damaging short-circuit currents.
What is the current rating of the F300661?
This fuse has a 200 A current rating.
What voltage is the fuse rated for?
The fuse is rated for 1250 V AC (IEC) and 1300 V AC (UL).
What does the aR fuse characteristic mean?
The aR characteristic identifies an ultra-fast semiconductor protection fuse designed specifically to protect power electronic devices from short-circuit faults.
Which equipment commonly uses this fuse?
The F300661 is commonly installed in industrial drives, power converters, renewable energy systems, UPS equipment and other high-power semiconductor applications.
Trusted Protection for Industrial Power Electronics
Mersen Protistor® semiconductor fuses are trusted worldwide by electrical engineers, OEMs and industrial manufacturers for protecting high-value semiconductor equipment in demanding industrial applications.
