High-speed aR fuse with 450A rating, 1250VAC IEC and 1300VAC UL rated voltage, integrated striker indication, and DIN 110 blade connections for industrial semiconductor protection.
£262.27
The Mersen D300567 is a high-performance Protistor® square body semiconductor protection fuse engineered to provide fast and reliable protection for sensitive power electronic devices. Designed for demanding industrial applications, this ultra-fast aR high-speed fuse helps protect IGBTs, diodes, thyristors and other semiconductor components from damaging short circuits.
As part of the trusted Mersen Protistor® Size 73 series, the D300567 combines high breaking capacity, low let-through energy and dependable performance in power conversion equipment. Its robust square body construction with DIN 110 blade terminals and integrated striker indicator simplifies installation and maintenance while ensuring reliable operation in critical electrical systems.
With a 450 A current rating, 1250 V AC IEC / 1300 V AC UL voltage rating and 126 kA breaking capacity, the D300567 is ideal for protecting industrial drives, UPS systems, renewable energy converters and other high-power semiconductor equipment.
High-speed semiconductor fuses are specifically designed to minimise fault energy reaching sensitive electronic components. Their rapid response helps reduce damage to expensive equipment while improving system reliability and reducing downtime.
The Mersen Protistor® range is widely used throughout industrial automation, renewable energy, traction, UPS systems and power conversion equipment where dependable semiconductor protection is essential for safe and efficient operation.
| Current | 11 A |
|---|---|
| Item number | D300567 |
| Catalogue No | PC73UD13C450D1A |
| Description | Square Body High-Speed Fuse Protistor® Size 73 aR 1250VAC IEC 1300VAC UL 450A With Striker DIN 110 Blades |
| EAN/UPC Code | 3605340330380 |
| Rated voltage AC UL | 1300 V |
| Rated voltage AC IEC | 1250 V |
| Ampere Rating | 450 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 73 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 290 kA²s |
| Melting I2t | 35.5 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 | 100 W |
| HS Code | 85351000 |
The D300567 is designed to protect semiconductor devices such as IGBTs, diodes and thyristors against short-circuit faults in industrial power electronic equipment.
This fuse has a 450 A current rating.
It is rated for 1250 V AC (IEC) and 1300 V AC (UL).
Yes. The D300567 includes an integrated striker indicator to simplify maintenance and fuse status identification.
It is commonly installed in industrial drives, power converters, UPS systems, renewable energy equipment and other semiconductor-based power systems.
Mersen Protistor® high-speed fuses are trusted worldwide by electrical engineers, OEMs and industrial manufacturers to deliver dependable semiconductor protection in demanding power conversion and automation applications.
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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...