High-speed fuse engineered for protection of sensitive power semiconductor devices, rated 1250VAC IEC and 1300VAC UL with 550A current capacity and integral striker indication.
£198.04
The Mersen E300499, catalogue number PC72UD13C550TF, is a premium square body high speed semiconductor fuse engineered to provide ultra-fast protection for modern high-voltage power electronic equipment. As part of the trusted Mersen Protistor® Size 72 series, this fuse is specifically designed to protect IGBTs, thyristors, diodes and other semiconductor devices against damaging short circuits and fault currents.
Designed for demanding industrial applications, the E300499 combines outstanding current limiting performance with low let-through energy to minimise damage to expensive equipment and maximise system uptime. Precision die-cut fuse elements embedded in solidified sand, silver-plated contact surfaces and non-magnetic hardware deliver dependable long-term protection for critical power conversion systems.
With a 550 A current rating, a 1250 V AC IEC rating and a 1300 V AC UL rating, the Mersen E300499 is ideally suited for high-voltage drives, renewable energy converters, energy storage systems, UPS installations and industrial automation equipment requiring dependable semiconductor protection.
High speed semiconductor fuses are engineered to interrupt fault currents before sensitive semiconductor devices can be damaged. The Mersen Protistor® Size 72 range delivers exceptionally fast fault clearing with low I²t values, making it ideal for protecting modern high-voltage power conversion equipment while improving system reliability and reducing costly downtime.
The E300499 is widely used in renewable energy systems, high-power converters, industrial drives, UPS installations and energy storage applications where dependable semiconductor protection is essential.
| Item number | E300499 |
|---|---|
| Catalogue No | PC72UD13C550TF |
| Description | Square Body High-Speed Fuse Protistor® Size 72 aR 1250VAC IEC 1300VAC UL 550A With Striker Flush ends metric threads |
| EAN/UPC Code | 3605340329353 |
| 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 | 72 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 550 kA²s |
| Melting I2t | 68 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 | 59 mm |
| Product Length | 74 mm |
| Product Height | 63 mm |
| Sell Pack Quantity | 1 EA |
| Sell Pack Weight | 0.8 kg |
| Sell Pack Width | 110 mm |
| Sell Pack Length | 130 mm |
| Sell Pack Height | 80 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.8 kg |
| Power Dissipation at Rated Current Value | 110 W |
| HS Code | 85351000 |
The E300499 provides ultra-fast protection for semiconductor devices including IGBTs, thyristors and diodes used in high-voltage power conversion equipment.
The Mersen E300499 has a 550 A rated current.
It is rated for 1250 V AC (IEC) and 1300 V AC (UL) applications.
The aR operating class provides partial-range ultra-fast protection specifically designed for semiconductor devices against short-circuit faults.
It is commonly installed in renewable energy systems, industrial drives, converters, UPS systems and other high-voltage power electronic installations.
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, panel builders and industrial engineers to deliver dependable protection for critical 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...