High-speed fuse designed for semiconductor protection with 630A rating, 1100VAC IEC and 1200VAC UL voltage ratings, featuring a ceramic body, integrated striker, and DIN 110 blade terminals.
£207.21
The Mersen X300561 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 72 aR series, it delivers dependable protection for modern high-power conversion equipment operating in demanding industrial environments.
Engineered with low energy let-through characteristics and high interrupting capacity, the X300561 helps minimise damage caused by short-circuit faults while improving equipment reliability and reducing downtime. Its square body construction incorporates silver-plated contacts, DIN 110 blade terminals and an integrated striker indicator for simplified maintenance and monitoring.
With a 630 A current rating and a 1100 V AC IEC / 1200 V AC UL voltage rating, the Mersen X300561 is ideally suited for protecting industrial drives, UPS systems, converters, renewable energy equipment and other high-voltage power electronic applications.
High-speed semiconductor fuses are specifically engineered to interrupt fault currents before expensive semiconductor devices can be damaged. Their ultra-fast response helps reduce thermal stress while maintaining the reliability and performance of industrial power conversion equipment.
The Mersen Protistor® range is widely used throughout industrial automation, renewable energy, transportation and heavy industry, providing dependable protection for drives, converters, rectifiers and UPS systems.
| Current | 11 A |
|---|---|
| Item number | X300561 |
| Catalogue No | PC72UD11C630D1A |
| Description | Square Body High-Speed Fuse Protistor® Size 72 aR 1100VAC IEC 1200VAC UL 630A With Striker DIN 110 Blades |
| EAN/UPC Code | 3605340330274 |
| Rated voltage AC UL | 1200 V |
| Rated voltage AC IEC | 1100 V |
| Ampere Rating | 630 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 72 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 690 kA²s |
| Melting I2t | 106.3 kA²s |
| AC Max I.R./Breaking Capacity | I1: 150 kA |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Silver-Plated Copper |
| Connection/Terminal Type | DIN 110 Blades |
| Product Width | 59 mm |
| Product Length | 133.4 mm |
| Product Height | 63 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 2.1099 kg |
| Sell Pack Width | 142 mm |
| Sell Pack Length | 194 mm |
| Sell Pack Height | 72 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.7033 kg |
| Power Dissipation at Rated Current Value | 125 W |
| HS Code | 85351000 |
The X300561 provides ultra-fast protection for semiconductor devices including IGBTs, thyristors and diodes used in industrial power conversion equipment.
This fuse has a 630 A current rating.
The fuse is rated for 1100 V AC (IEC) and 1200 V AC (UL).
Yes. The fuse incorporates an integrated striker indicator that can operate a compatible microswitch for remote indication.
It is commonly installed in industrial drives, converters, UPS systems, renewable energy equipment and other high-voltage power electronic applications.
Mersen Protistor® semiconductor protection fuses are trusted worldwide to safeguard critical power electronic equipment by delivering rapid fault interruption, high breaking capacity and dependable long-term performance.
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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...