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MERSEN FUSE 12,5 URD 72 EF 0450 12,5URD72EF0450
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.
£137.71
Why Choose the Mersen N300622 Protistor® High-Speed Fuse?
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.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 450 A continuous current rating.
- 1250 V AC IEC / 1300 V AC UL voltage rating.
- Integrated striker for remote fuse indication.
- Open slot blade terminals for straightforward installation.
- Low I²t helps protect valuable semiconductor devices.
- High 126 kA breaking capacity.
- Designed for demanding industrial power conversion applications.
Key Features
- Mersen Protistor® Size 72 series.
- Catalogue number PC72UD13C450EF.
- 450 A rated current.
- 1250 V AC IEC / 1300 V AC UL.
- aR ultra-fast operating characteristic.
- Open slot blade terminals.
- Silver-plated contact surfaces.
- Integrated striker indicator.
- RoHS compliant.
Engineered for High-Voltage Semiconductor Protection
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.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial power converters.
- Renewable energy inverters.
- UPS systems.
- Battery energy storage systems.
- Industrial motor drives.
- Traction and transportation equipment.
- Semiconductor protection installations.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 1250 V | |
| 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 |
Frequently Asked Questions
What is the Mersen N300622 used for?
The Mersen N300622 is designed to protect IGBTs, thyristors, diodes and other semiconductor devices against damaging short-circuit faults in industrial power electronic equipment.
What is the current rating?
The Mersen N300622 has a continuous current rating of 450 A.
What voltage is the fuse rated for?
It is rated for 1250 V AC (IEC) and 1300 V AC (UL).
Does the N300622 include a striker indicator?
Yes. The fuse includes an integrated striker that can operate compatible remote indication microswitch accessories.
What does the aR operating characteristic mean?
The aR characteristic identifies an ultra-fast semiconductor protection fuse designed specifically for short-circuit protection of sensitive semiconductor devices.
Trusted by Industrial Engineers Worldwide
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.
