High-speed aR characteristic fuse designed for semiconductor protection with 450A rating, 1250VAC IEC and 1300VAC UL voltage ratings, featuring a striker indication system and bolted mounting.
£229.51
The Mersen N300622, catalogue number PC72UD13C450EF, is a Protistor® Size 72 square body high-speed semiconductor protection fuse designed to provide ultra-fast short-circuit protection for modern power electronic equipment. Featuring an aR operating characteristic, it is specifically engineered to protect IGBTs, thyristors, diodes and other sensitive semiconductor devices used in demanding industrial applications.
Rated at 450 A, with a 1250 V AC IEC and 1300 V AC UL voltage rating, the N300622 delivers exceptional current limitation and dependable fault interruption. Its square body construction with open slot blade terminals and integrated striker provides flexible installation and reliable status indication in high-power electrical systems.
Manufactured using precision die-cut silver fuse elements embedded in solidified sand, the Protistor® design provides low let-through energy (I²t), helping minimise damage to expensive semiconductor devices while maximising equipment reliability and reducing downtime.
Protistor® high-speed semiconductor fuses are designed to interrupt fault currents before excessive thermal energy can damage expensive semiconductor devices. Their low energy let-through and high interrupting capability help maximise equipment reliability while reducing maintenance costs and unplanned downtime.
The Mersen N300622 is widely used in high-voltage industrial drives, renewable energy converters, UPS systems and other power conversion equipment requiring dependable semiconductor protection.
| Item number | N300622 |
|---|---|
| Catalogue No | PC72UD13C450EF |
| Description | Square Body High-Speed Fuse Protistor® Size 72 aR 1250VAC IEC 1300VAC UL 450A With Striker Open Slot Blades |
| EAN/UPC Code | 3605340331127 |
| 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 Copper |
| Connection/Terminal Type | Open Slot Blades |
| Product Width | 59 mm |
| Product Length | 149.4 mm |
| Product Height | 63 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 2.274 kg |
| Sell Pack Width | 157 mm |
| Sell Pack Length | 205 mm |
| Sell Pack Height | 80 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.758 kg |
| Power Dissipation at Rated Current Value | 89 W |
| HS Code | 85351000 |
The Mersen N300622 is designed to protect IGBTs, thyristors, diodes and other semiconductor devices against damaging short-circuit faults in industrial power electronic equipment.
The Mersen N300622 has a continuous current rating of 450 A.
It is rated for 1250 V AC (IEC) and 1300 V AC (UL).
Yes. The fuse includes an integrated striker that can operate compatible remote indication microswitch accessories.
The aR characteristic identifies an ultra-fast semiconductor protection fuse designed specifically for short-circuit protection of sensitive semiconductor devices.
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, machine builders and maintenance engineers for providing reliable, high-speed protection of critical industrial power electronic equipment.
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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...