High-speed fuse designed for reliable circuit protection in industrial and power electronics applications, rated at 630A, 1250VAC IEC, 1300VAC UL, with striker indication and flush end silver-plated brass terminals.
£233.04
The Mersen Q300509 (PC73UD13C630TF) is a high-performance square body semiconductor protection fuse engineered to provide exceptional protection for sensitive power electronic devices. Part of the renowned Mersen Protistor® Size 73 series, this ultra-fast acting aR fuse is specifically designed to safeguard diodes, thyristors, IGBTs and other semiconductor components in demanding industrial power conversion applications.
Designed for reliability and rapid fault interruption, the Q300509 delivers outstanding current limitation and low let-through energy, helping to minimise damage to expensive semiconductor equipment. Its silver-plated contacts, robust ceramic body and high breaking capacity ensure dependable operation in challenging industrial environments.
With a 630 A current rating and 1250 V AC IEC / 1300 V AC UL voltage rating, the Mersen Q300509 is ideally suited for high-power drives, UPS systems, renewable energy equipment, DC drives and industrial power converters where fast semiconductor protection is essential.
Semiconductor protection fuses are specifically engineered to interrupt high fault currents before sensitive electronic components can be damaged. Their ultra-fast operating characteristics provide significantly lower let-through energy than conventional industrial fuses, making them ideal for protecting high-value power conversion equipment.
The Mersen Protistor® range is trusted worldwide across industrial automation, renewable energy, UPS systems and motor drive applications, delivering dependable protection for critical semiconductor devices while reducing costly downtime.
| Item number | Q300509 |
|---|---|
| Catalogue No | PC73UD13C630TF |
| Description | Square Body High-Speed Fuse Protistor® Size 73 aR 1250VAC IEC 1300VAC UL 630A With Striker Flush ends metric threads |
| EAN/UPC Code | 3605340329544 |
| Rated voltage AC UL | 1300 V |
| Rated voltage AC IEC | 1250 V |
| Ampere Rating | 630 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 73 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 680 kA²s |
| Melting I2t | 84 kA²s |
| AC Max I.R./Breaking Capacity | I1: 126 kA |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Silver-Plated Brass |
| Connection/Terminal Type | Flush ends |
| Product Width | 73 mm |
| Product Length | 74 mm |
| Product Height | 78.5 mm |
| Sell Pack Quantity | 1 EA |
| Sell Pack Weight | 1.22 kg |
| Sell Pack Width | 110 mm |
| Sell Pack Length | 125 mm |
| Sell Pack Height | 75 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 1.22 kg |
| Power Dissipation at Rated Current Value | 125 W |
| HS Code | 85351000 |
It is an ultra-fast semiconductor protection fuse designed to protect IGBTs, thyristors, diodes and other sensitive power electronic components.
The Mersen Q300509 has a 630 A current rating.
The fuse is rated for 1250 V AC (IEC) and 1300 V AC (UL).
The aR characteristic provides ultra-fast protection specifically for semiconductor devices against short-circuit faults while allowing normal operating currents.
It is commonly installed in variable speed drives, power converters, UPS systems, renewable energy equipment and industrial power electronics requiring semiconductor protection.
Mersen Protistor® semiconductor fuses are widely specified by engineers and OEMs worldwide to provide fast, reliable protection for high-value power electronic equipment operating 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...