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MERSEN FUSE 12,5 URD 73 D11 A 0400 12,5URD73D11A0400
High-speed semiconductor protection fuse with integrated striker and DIN 110 blade terminals, rated 400A at 1300VAC.
£155.01
Why Choose the Mersen C300566 High-Speed Semiconductor Fuse?
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.
Key Advantages
- Ultra-fast aR semiconductor fuse for protecting power electronic equipment.
- 400 A current rating for demanding industrial applications.
- 1250 V AC IEC / 1300 V AC UL voltage rating.
- Low let-through energy helps minimise semiconductor damage.
- Integrated striker indicator for maintenance and remote monitoring.
- High interrupting capacity suitable for modern power conversion systems.
Key Features
- Mersen Protistor® Size 73 aR series.
- 400 A rated current.
- 1250 V AC IEC / 1300 V AC UL rated voltage.
- Ultra-fast aR operating characteristic.
- DIN 110 blade terminals.
- Integrated striker indication.
- Silver-plated contact surfaces.
- Designed for protecting IGBTs, SCRs, thyristors and power semiconductor modules.
Reliable Protection for Industrial Power Electronics
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.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and inverters.
- UPS and backup power systems.
- Renewable energy converters.
- Protection of IGBT, SCR and diode modules.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 1250 V | |
| 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 |
Frequently Asked Questions
What is the Mersen C300566 used for?
The C300566 is a high-speed semiconductor fuse designed to protect IGBTs, thyristors, diodes and other power electronic components against short-circuit faults.
What is the current rating of this fuse?
The fuse has a 400 A current rating.
What voltage is the fuse rated for?
It is rated for 1250 V AC (IEC) and 1300 V AC (UL).
What type of terminals does the fuse use?
The Mersen C300566 is fitted with DIN 110 blade terminals for secure installation in compatible fuse assemblies.
Does the fuse include an indicator?
Yes. The fuse incorporates an integrated striker indicator that can be used for visual or remote indication when installed with suitable accessories.
Trusted for Semiconductor Protection Worldwide
Mersen Protistor® semiconductor fuses are trusted by OEMs, machine builders and industrial engineers worldwide for delivering dependable protection of critical power electronic equipment.
