High-speed aR characteristic fuse for semiconductor protection rated at 550A, 1100VAC IEC and 1200VAC UL with integrated striker and flush end terminals.
£182.81
The Mersen G300524 is a genuine Protistor® Size 71 aR high-speed semiconductor fuse engineered to provide advanced protection for today's high-power electronic equipment. Designed for demanding industrial applications, this square body fuse delivers ultra-fast fault interruption to protect sensitive semiconductor devices including IGBTs, thyristors and diodes from damaging short-circuit conditions.
With a 550 A current rating and 1100 V AC (IEC) / 1200 V AC (UL) voltage ratings, the G300524 is ideally suited to high-voltage power converters, industrial drives, renewable energy systems, UPS installations and other demanding power conversion equipment. Its ultra-fast aR operating characteristic helps minimise let-through energy, reducing equipment damage while improving overall system reliability.
Supplied under manufacturer part number G300524 and catalogue number PC71UD11C550TF, this fuse features flush-end metric threaded terminals with an integrated striker indication system for straightforward monitoring and maintenance. Silver-plated contact surfaces and robust construction make it suitable for continuous operation in demanding industrial environments.
High-speed semiconductor fuses are specifically engineered to protect sensitive electronic power devices requiring extremely rapid fault interruption. Their low let-through energy helps safeguard expensive semiconductor assemblies while maintaining reliable system operation and reducing maintenance costs.
The Mersen Protistor® Size 71 range provides maximum flexibility for equipment designers and is widely specified for renewable energy converters, industrial automation, high-power drives, UPS systems and other high-voltage power conversion applications.
| Item number | G300524 |
|---|---|
| Catalogue No | PC71UD11C550TF |
| Description | Square Body High-Speed Fuse Protistor® Size 71 aR 1100VAC IEC 1200VAC UL 550A With Striker Flush ends metric threads |
| EAN/UPC Code | 3605340329766 |
| Rated voltage AC UL | 1200 V |
| Rated voltage AC IEC | 1100 V |
| Ampere Rating | 550 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 71 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 548 kA²s |
| Melting I2t | 84 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 | 98 W |
| HS Code | 85351000 |
The Mersen G300524 is a high-speed semiconductor fuse designed to protect power electronic equipment against short-circuit and overcurrent faults.
The fuse has a 550 A current rating.
It is rated for 1100 V AC (IEC) and 1200 V AC (UL).
The fuse features flush-end metric threaded terminals with an integrated striker indication system.
It is commonly installed in high-voltage drives, renewable energy converters, UPS systems and industrial power conversion equipment.
Mersen Protistor® semiconductor fuses are trusted by OEMs, panel builders and maintenance engineers worldwide for reliable protection of critical power electronic equipment in demanding industrial environments.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...