High-speed aR fuse designed for semiconductor protection with 450A rating, certified to IEC and UL standards, featuring a ceramic square body, striker indication, and metric threaded flush terminals.
£180.57
The Mersen C300497 is a high-performance Protistor® square body high-speed semiconductor fuse engineered to provide exceptional protection for sensitive power semiconductor devices in demanding industrial applications. Designed as part of the renowned Mersen Protistor® Size 72 aR series, this fuse delivers rapid fault interruption to protect IGBTs, thyristors, diodes and other power electronic components.
Designed for use in modern power conversion equipment, the C300497 combines high breaking capacity with low let-through energy, helping minimise damage during short-circuit conditions. Its robust construction, silver-plated contacts and solidified sand filling provide reliable long-term performance in harsh industrial environments.
With a 450 A current rating and 1250 V AC IEC / 1300 V AC UL voltage rating, the Mersen C300497 is ideally suited for variable speed drives, UPS systems, renewable energy converters and industrial power control equipment. The integrated striker indicator also enables simple fuse status monitoring and maintenance.
High-speed semiconductor fuses are specifically designed to protect expensive power electronic components from catastrophic short-circuit faults. Their ultra-fast operating characteristics limit fault energy before sensitive semiconductor devices can be damaged, helping maximise equipment uptime while reducing repair costs.
The Mersen Protistor® range is trusted by OEMs and industrial engineers worldwide for protecting variable frequency drives, renewable energy systems, UPS equipment, motor drives and industrial power conversion systems where dependable semiconductor protection is essential.
| Item number | C300497 |
|---|---|
| Catalogue No | PC72UD13C450TF |
| Description | Square Body High-Speed Fuse Protistor® Size 72 aR 1250VAC IEC 1300VAC UL 450A With Striker Flush ends metric threads |
| EAN/UPC Code | 3605340329315 |
| Rated voltage AC UL | 1300 V |
| Rated voltage AC IEC | 1250 V |
| Ampere Rating | 450 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 72 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 360 kA²s |
| Melting I2t | 44.2 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 | 89 W |
| HS Code | 85351000 |
The C300497 is a high-speed semiconductor fuse designed to protect IGBTs, thyristors, diodes and other power electronic components from short-circuit faults.
The fuse has a 450 A current rating.
The fuse is rated for 1250 V AC (IEC) and 1300 V AC (UL).
The aR characteristic provides ultra-fast short-circuit protection specifically for semiconductor devices while allowing normal operating currents to pass without nuisance operation.
Yes. The C300497 features an integrated striker indicator for simplified maintenance and remote indication when used with suitable accessories.
Mersen Protistor® high-speed semiconductor fuses are widely specified by OEMs, panel builders and industrial engineers for delivering dependable protection of power electronic 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...