The Protistor® PC73UD13C550D1A high-speed fuse delivers reliable protection for demanding industrial power electronics, supporting up to 1250VAC (IEC)/1300VAC (UL) at 550A with an integrated striker for remote fuse status indication.
£272.80
The Mersen F300569 (catalogue number PC73UD13C550D1A) is a premium Protistor® square body high-speed semiconductor protection fuse designed to provide exceptional protection for modern power electronic equipment. Engineered specifically to safeguard IGBTs, thyristors, diodes and semiconductor modules, it delivers ultra-fast fault interruption, helping minimise damage during high fault current conditions.
As part of the advanced Mersen Protistor® Size 73 aR series, this fuse incorporates low let-through energy (I²t), silver-plated contacts and a robust ceramic square body construction. An integrated striker indicator enables remote status indication or operation of an optional microswitch, simplifying maintenance and improving system monitoring.
With a 550 A current rating and operating voltages of 1250 V AC (IEC) and 1300 V AC (UL), the F300569 is ideally suited for protecting industrial drives, power converters, renewable energy equipment, UPS systems and other demanding semiconductor applications.
The Mersen F300569 is engineered 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.
| Current | 11 A |
|---|---|
| Item number | F300569 |
| Catalogue No | PC73UD13C550D1A |
| Description | Square Body High-Speed Fuse Protistor® Size 73 aR 1250VAC IEC 1300VAC UL 550A With Striker DIN 110 Blades |
| EAN/UPC Code | 3605340330427 |
| Rated voltage AC UL | 1300 V |
| Rated voltage AC IEC | 1250 V |
| Ampere Rating | 550 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 73 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 465 kA²s |
| Melting I2t | 57 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 | 120 W |
| HS Code | 85351000 |
The F300569 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 550 A current rating.
The fuse is rated for 1250 V AC (IEC) and 1300 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 F300569 is commonly installed in industrial drives, power converters, renewable energy systems, UPS equipment 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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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...