High-speed semiconductor protection fuse with integrated striker and DIN 110 blade terminals, rated 400A at 1300VAC.
£258.35
The Mersen C300566 is a premium Protistor® Size 73 high-speed semiconductor fuse engineered to provide exceptional protection for sensitive power electronic components in demanding industrial applications. Designed as part of the trusted Mersen Protistor® Size 73 aR series, it delivers ultra-fast fault interruption to safeguard IGBTs, thyristors, diodes and other semiconductor devices from damaging short-circuit currents.
Manufactured using precision die-cut fuse elements embedded in solidified sand, the C300566 offers low let-through energy and outstanding interrupting performance. Silver-plated contact surfaces and a robust square body design ensure dependable long-term operation in industrial power conversion equipment.
With a 400 A current rating and a 1250 V AC IEC / 1300 V AC UL voltage rating, the Mersen C300566 is ideally suited for variable speed drives, renewable energy converters, UPS systems and industrial power control equipment. It features DIN 110 blade terminals and an integrated striker for convenient status indication.
High-speed semiconductor fuses are designed to protect valuable power electronic components by rapidly interrupting high fault currents before they can damage sensitive devices. Their low I²t performance reduces thermal stress on semiconductor assemblies, helping improve equipment reliability and minimise costly downtime.
The Mersen Protistor® range is widely specified by OEMs and industrial engineers for use in variable frequency drives, industrial inverters, renewable energy systems and UPS installations where dependable semiconductor protection is essential.
| Current | 11 A |
|---|---|
| Item number | C300566 |
| Catalogue No | PC73UD13C400D1A |
| Description | Square Body High-Speed Fuse Protistor® Size 73 aR 1250VAC IEC 1300VAC UL 400A With Striker DIN 110 Blades |
| EAN/UPC Code | 3605340330366 |
| Rated voltage AC UL | 1300 V |
| Rated voltage AC IEC | 1250 V |
| Ampere Rating | 400 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 73 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 205 kA²s |
| Melting I2t | 25 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 | DIN 110 Blades |
| Product Width | 73 mm |
| Product Length | 133.4 mm |
| Product Height | 78.5 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 3.36 kg |
| Sell Pack Width | 150 mm |
| Sell Pack Length | 250 mm |
| Sell Pack Height | 90 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 1.12 kg |
| Power Dissipation at Rated Current Value | 93 W |
| HS Code | 85351000 |
The C300566 is a high-speed semiconductor fuse designed to protect IGBTs, thyristors, diodes and other power electronic components against short-circuit faults.
The fuse has a 400 A current rating.
It is rated for 1250 V AC (IEC) and 1300 V AC (UL).
The Mersen C300566 is fitted with DIN 110 blade terminals for secure installation in compatible fuse assemblies.
Yes. The fuse incorporates an integrated striker indicator that can be used for visual or remote indication when installed with suitable accessories.
Mersen Protistor® semiconductor fuses are trusted by OEMs, machine builders and industrial engineers worldwide for delivering dependable protection of critical power electronic equipment.
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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...