High-speed fuse rated at 700A and 1250VAC IEC with aR characteristic, striker indication, flush ends with metric threads and Omega connection for secure bolted mounting.
£397.35
The Mersen X300722 is a premium square body semiconductor protection fuse designed to provide ultra-fast protection for sensitive power semiconductor devices including IGBTs, thyristors and diodes. As part of the Mersen Protistor® Size 2×72 aR series, it delivers exceptional short-circuit protection for high-voltage power conversion equipment operating in demanding industrial environments.
Manufactured using die-cut silver fuse elements embedded in solidified sand, the X300722 provides low energy let-through characteristics, excellent arc control and high interrupting capacity. Silver-plated contact surfaces, non-magnetic hardware, flush-end metric threaded terminals with Omega connection and an integrated striker indicator ensure dependable operation and simplified maintenance.
With a 700 A current rating and a 1250 V AC IEC voltage rating, the Mersen X300722 is ideally suited for protecting industrial drives, converters, UPS systems, renewable energy equipment and other high-power electronic applications.
High-speed semiconductor fuses are specifically designed to interrupt fault currents before expensive semiconductor devices can be damaged. Their ultra-fast response reduces thermal stress while maintaining the performance and reliability of industrial power conversion equipment.
The Mersen Protistor® range is trusted worldwide across industrial automation, renewable energy, transportation and manufacturing industries, providing dependable protection for drives, converters, rectifiers and UPS systems.
| Item number | X300722 |
|---|---|
| Catalogue No | PC272UD13C700TF |
| Description | Square Body High-Speed Fuse Protistor® Size 2x72 aR 1250VAC IEC 700A With Striker Flush ends metric threads With Omega connection |
| EAN/UPC Code | 3605340332674 |
| Rated voltage AC IEC | 1250 V |
| Ampere Rating | 700 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 2x72 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 675 kA²s |
| Melting I2t | 84 kA²s |
| AC Max I.R./Breaking Capacity | I1: 100 kA |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Silver-Plated Brass |
| Connection/Terminal Type | Flush ends |
| Product Width | 138.5 mm |
| Product Length | 91 mm |
| Product Height | 65.5 mm |
| Sell Pack Quantity | 1 EA |
| Sell Pack Weight | 1.698 kg |
| Sell Pack Width | 90 mm |
| Sell Pack Length | 205 mm |
| Sell Pack Height | 95 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 1.698 kg |
| Power Dissipation at Rated Current Value | 162 W |
| HS Code | 85351000 |
| Country of Manufacture | France |
The X300722 provides ultra-fast protection for semiconductor devices including IGBTs, thyristors and diodes used in industrial power conversion equipment.
This fuse has a 700 A current rating.
The fuse is rated for 1250 V AC (IEC).
Yes. The fuse incorporates an integrated striker indicator which can operate a compatible microswitch for remote status indication.
It is commonly installed in industrial drives, converters, UPS systems, renewable energy equipment and other high-power semiconductor applications.
Mersen Protistor® semiconductor protection fuses are trusted worldwide to safeguard critical power electronic equipment through rapid fault interruption, high breaking capacity and dependable long-term reliability.
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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...