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MERSEN FUSE 12,5 URD 73 EF 0630 PC73UD13C630EF
High-speed fuse designed for protecting power semiconductors with rapid fault interruption, striker indication system, and open slot blade terminals. Rated 630A, 1250VAC IEC, 1300VAC UL.
£158.15
Why Choose the Mersen B300634 High-Speed Semiconductor Fuse?
The Mersen B300634 is a high-performance square body high-speed semiconductor fuse developed to protect sensitive power electronic components against damaging short-circuit currents. Part of the established Mersen Protistor® high-speed fuse range, it is designed for industrial systems containing IGBTs, thyristors, power diodes, rectifiers and other semiconductor devices.
Featuring an ultra-fast aR operating characteristic, the B300634 interrupts severe fault currents rapidly and limits the electrical energy allowed to pass through the circuit. This helps protect valuable semiconductor assemblies, reduce equipment damage and minimise unplanned downtime in demanding power conversion applications.
With a rated current of 350 A and voltage ratings of 1250 V AC under IEC standards and 1300 V AC under UL standards, the Mersen B300634 is suitable for industrial drives, converters, inverters, uninterruptible power supplies and renewable energy equipment requiring dependable high-speed protection.
Key Advantages
- High-speed aR semiconductor protection fuse for power electronic equipment.
- 350 A rated current for demanding industrial circuits.
- 1250 V AC IEC and 1300 V AC UL voltage ratings.
- Ultra-fast fault interruption helps reduce damaging energy let-through.
- Suitable for protecting IGBTs, thyristors, diodes and rectifier assemblies.
- Robust square body construction for dependable industrial performance.
Key Features
- Mersen Protistor® high-speed fuse technology.
- Catalogue number: PC71UD13C350EF.
- 350 A rated current.
- 1250 V AC IEC rating.
- 1300 V AC UL rating.
- aR ultra-fast operating characteristic.
- Square body Size 71 construction.
- Open-slot blade terminals for industrial mounting.
Reliable Protection for Power Electronics
Power semiconductor components can be permanently damaged by fault currents before a conventional industrial fuse has time to operate. The Mersen B300634 is engineered to respond rapidly during short-circuit conditions, restricting peak current and total energy let-through to help preserve sensitive electronic devices.
Its partial-range aR characteristic is specifically intended for semiconductor short-circuit protection. Correct fuse selection should include confirmation of the current rating, voltage rating, breaking capacity, operating class, terminal arrangement and physical dimensions against the equipment manufacturer’s documentation.
Typical Applications
- Variable frequency drives and industrial motor controllers.
- Power converters and rectifier systems.
- Industrial inverters and power supplies.
- Uninterruptible power supply equipment.
- Renewable energy and energy storage systems.
- High-power semiconductor protection circuits.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 1250 V | |
| Item number | B300634 | |
| Catalogue No | PC73UD13C630EF | |
| Description | Square Body High-Speed Fuse Protistor® Size 73 aR 1250VAC IEC 1300VAC UL 630A With Striker Open Slot Blades | |
| EAN/UPC Code | 3605340331356 | |
| Rated voltage AC UL | 1300 V | |
| Rated voltage AC IEC | 1250 V | |
| Ampere Rating | 630 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 73 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 680 kA²s | |
| Melting I2t | 84 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 | 73 mm | |
| Product Length | 149.4 mm | |
| Product Height | 78.5 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 1.11 kg | |
| Sell Pack Width | 110 mm | |
| Sell Pack Length | 180 mm | |
| Sell Pack Height | 80 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 1.11 kg | |
| Power Dissipation at Rated Current Value | 132 W | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen B300634 used for?
The Mersen B300634 is used to protect sensitive semiconductor components against damaging short-circuit currents in industrial power electronic equipment.
What is the current rating of the B300634?
The Mersen B300634 has a rated current of 350 A.
What voltage is this fuse rated for?
The fuse is rated for 1250 V AC under IEC standards and 1300 V AC under UL standards.
What does the aR fuse classification mean?
The aR classification identifies an ultra-fast partial-range fuse designed primarily to provide short-circuit protection for semiconductor devices.
Where is the Mersen B300634 commonly installed?
It is commonly installed in industrial drives, converters, inverters, UPS systems, renewable energy equipment and other semiconductor-based power systems.
Trusted for Industrial Semiconductor Protection
Mersen Protistor® high-speed fuses are widely used by electrical engineers, equipment manufacturers and maintenance professionals to protect valuable semiconductor components in demanding power conversion systems.
