High-speed aR fuse designed for semiconductor protection with 500A rating, 1100VAC IEC and 1200VAC UL voltage ratings, featuring a ceramic body and integrated striker indication system.
£195.40
The Mersen F300615 (catalogue number PC71UD11C500EF) is a premium Protistor® square body high-speed semiconductor protection fuse engineered to provide exceptional protection for modern power electronic equipment. Designed specifically to safeguard IGBTs, thyristors, diodes and semiconductor modules, it delivers ultra-fast fault interruption to minimise damage during short-circuit conditions.
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 to optimise arc control. The integrated striker indicator allows remote indication or operation of an optional microswitch, simplifying maintenance and system monitoring.
Rated at 500 A with operating voltages of 1100 V AC (IEC) and 1200 V AC (UL), the F300615 is ideally suited for protecting industrial drives, power converters, UPS systems, renewable energy equipment and other demanding semiconductor applications.
The Mersen F300615 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 in industrial automation, renewable energy systems and power conversion equipment where dependable protection of semiconductor devices is essential for safe and reliable operation.
| Item number | F300615 |
|---|---|
| Catalogue No | PC71UD11C500EF |
| Description | Square Body High-Speed Fuse Protistor® Size 71 aR 1100VAC IEC 1200VAC UL 500A With Striker Open Slot Blades |
| EAN/UPC Code | 3605340331004 |
| 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 Copper |
| Connection/Terminal Type | Open Slot Blades |
| Product Width | 51 mm |
| Product Length | 149.4 mm |
| Product Height | 56.5 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 1.62 kg |
| Sell Pack Width | 140 mm |
| Sell Pack Length | 174 mm |
| Sell Pack Height | 71 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.54 kg |
| Power Dissipation at Rated Current Value | 100 W |
| HS Code | 85351000 |
The F300615 is a high-speed semiconductor fuse designed to protect IGBTs, thyristors, diodes and other power electronic devices against damaging short-circuit currents.
This fuse has a 500 A current rating.
The fuse is rated for 1100 V AC (IEC) and 1200 V AC (UL).
The aR characteristic identifies an ultra-fast semiconductor protection fuse designed specifically to protect power electronic devices from short-circuit faults.
The F300615 is commonly installed in industrial drives, power converters, UPS equipment, renewable energy systems and other high-power semiconductor applications.
Mersen Protistor® semiconductor fuses are trusted worldwide by electrical engineers, OEMs and industrial manufacturers for protecting high-value semiconductor equipment in demanding industrial applications.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...