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MERSEN FUSE 12,5 URD 72 EF 0350 L300620
Engineered for critical protection in power electronics, the Protistor® PC72UD13C350EF offers rapid response and reliable current interruption at 1250VAC IEC (1300VAC UL), safeguarding sensitive equipment from damaging overloads and short circuits.
£129.85
Why Choose the Mersen L300620 Protistor® High-Speed Fuse?
The Mersen L300620, catalogue number PC72UD13C350EF, is a Protistor® Size 72 square body high-speed semiconductor fuse engineered to provide exceptional protection for high-power semiconductor equipment. Featuring an ultra-fast aR operating characteristic, it delivers outstanding short-circuit protection for IGBTs, thyristors, diodes and other sensitive semiconductor devices used in modern power conversion systems.
Designed for demanding industrial environments, the L300620 combines low let-through energy with high interrupting capacity to minimise semiconductor damage during fault conditions. Precision die-cut fuse elements embedded in solidified sand provide controlled arc extinction, while silver-plated contacts and non-magnetic hardware ensure dependable long-term performance. The fuse features EF open-slot blade terminals with an integrated striker for optional remote indication.
Rated at 350 A, with 1250 V AC (IEC) and 1300 V AC (UL) voltage ratings, the Mersen L300620 is ideally suited to industrial drives, renewable energy converters, UPS systems, traction equipment and other high-power semiconductor applications.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 350 A current rating for high-power industrial applications.
- 1250 V AC IEC / 1300 V AC UL voltage capability.
- Low I²t characteristics minimise semiconductor damage.
- High interrupting capacity for demanding fault conditions.
- Open-slot EF blade terminals for secure installation.
- Integrated striker supports optional remote indication.
Key Features
- Mersen Protistor® Size 72 series.
- Catalogue number: PC72UD13C350EF.
- 350 A rated current.
- 1250 V AC IEC / 1300 V AC UL rated voltage.
- aR ultra-fast operating characteristic.
- EF open-slot blade terminals.
- Integrated low-voltage striker indicator.
- Silver-plated contact surfaces.
- Square body ceramic construction.
Advanced Protection for High-Power Electronics
Protistor® semiconductor fuses are specifically engineered to interrupt high fault currents before expensive semiconductor devices suffer catastrophic damage. Their ultra-fast response and low energy let-through characteristics maximise equipment reliability while reducing maintenance costs across demanding industrial power conversion systems.
The robust square body construction, precision fuse elements, silver-plated contacts and integrated striker make the Mersen L300620 an excellent choice for protecting high-power converters, industrial drives and renewable energy systems requiring dependable semiconductor protection.
Typical Applications
- High-power variable speed drives.
- Industrial power converters.
- Renewable energy inverters.
- Large UPS systems.
- Traction and transportation power electronics.
- Industrial rectifiers.
- IGBT, thyristor and diode protection.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 1250 V | |
| Item number | L300620 | |
| Catalogue No | PC72UD13C350EF | |
| Description | Square Body High-Speed Fuse Protistor® Size 72 aR 1250VAC IEC 1300VAC UL 350A With Striker Open Slot Blades | |
| EAN/UPC Code | 3605340331080 | |
| Rated voltage AC UL | 1300 V | |
| Rated voltage AC IEC | 1250 V | |
| Ampere Rating | 350 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 72 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 170 kA²s | |
| Melting I2t | 21 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 | 77 W | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen L300620 used for?
The Mersen L300620 is a high-speed semiconductor protection fuse designed to protect IGBTs, thyristors, diodes and other sensitive semiconductor devices from damaging short-circuit currents.
What is the current rating of the L300620?
The Mersen L300620 has a rated current of 350 A.
What voltage is the fuse rated for?
The fuse is rated for 1250 V AC (IEC) and 1300 V AC (UL).
What type of terminals does the L300620 use?
The L300620 features EF open-slot blade terminals with an integrated striker for secure installation and optional remote indication.
Which applications is the L300620 suitable for?
It is commonly used in industrial drives, converters, renewable energy systems, UPS equipment and other high-power semiconductor applications requiring ultra-fast protection.
Trusted Protection for Critical Power Electronics
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, electrical engineers and industrial maintenance professionals to provide dependable protection for high-performance power electronic systems.
