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MERSEN FUSE 12,5 URD 71 EF 0250 12,5URD71EF0250
High-speed semiconductor protection fuse with aR characteristic, 250A rating, ceramic body, striker indication system, and open slot blade terminals for bolted mounting.
£93.34
Why Choose the Mersen A300610 High-Speed Semiconductor Fuse?
The Mersen A300610 is a robust Protistor® square-body high-speed semiconductor fuse designed to protect sensitive power electronic components against damaging short-circuit currents. Its ultra-fast operating characteristic makes it suitable for safeguarding diodes, thyristors, IGBT modules and other semiconductor devices used in demanding industrial power systems.
As part of the established Mersen Protistor® high-speed fuse range, the A300610 offers low let-through energy and rapid fault interruption. These characteristics help minimise thermal and mechanical stress on protected equipment, reducing the risk of secondary damage and costly operational downtime.
Featuring a rated current of 630 A and voltage ratings of 1250 V AC to IEC standards and 1300 V AC to UL standards, the Mersen A300610 is suitable for high-power variable frequency drives, converters, rectifiers, UPS systems and industrial motor-control equipment. Its square-body construction and blade terminals provide a secure connection within compatible fuse holders and power assemblies.
Key Advantages
- Ultra-fast aR semiconductor fuse protection.
- 630 A rated current for high-power industrial equipment.
- 1250 V AC IEC and 1300 V AC UL voltage ratings.
- Low let-through energy helps reduce semiconductor damage.
- Rapid fault interruption supports improved equipment reliability.
- Robust construction for demanding power-conversion applications.
Key Features
- Mersen Protistor® high-speed fuse series.
- Square-body semiconductor fuse.
- 630 A rated current.
- 1250 V AC IEC / 1300 V AC UL rated voltage.
- aR ultra-fast utilisation category.
- Blade-style terminal connections.
- Controlled arc interruption and low power losses.
- Engineered for short-circuit protection of power semiconductors.
Reliable Protection for High-Power Electronics
Power semiconductor devices can sustain permanent damage when exposed to short-circuit energy, even for a brief period. High-speed fuses such as the Mersen A300610 use precision-engineered fuse elements to interrupt fault currents rapidly and restrict the energy passed into the protected circuit.
This controlled fault-clearing performance makes the A300610 suitable for installations where system reliability and semiconductor protection are essential. Correct fuse coordination can help protect costly electronic modules, limit secondary equipment damage and reduce maintenance-related downtime.
Typical Applications
- High-power variable frequency drives.
- Industrial inverters and converters.
- Rectifier and thyristor assemblies.
- Uninterruptible power supply systems.
- Motor drives and soft starters.
- Industrial power supplies and automation equipment.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 1250 V | |
| Item number | A300610 | |
| Catalogue No | PC71UD13C250EF | |
| Description | Square Body High-Speed Fuse Protistor® Size 71 aR 1250VAC IEC 1300VAC UL 250A With Striker Open Slot Blades | |
| EAN/UPC Code | 3605340330953 | |
| Rated voltage AC UL | 1300 V | |
| Rated voltage AC IEC | 1250 V | |
| Ampere Rating | 250 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 71 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 72 kA²s | |
| Melting I2t | 8.9 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 | 51 mm | |
| Product Length | 149.4 mm | |
| Product Height | 56.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.62 kg | |
| Sell Pack Width | 140 mm | |
| Sell Pack Length | 174 mm | |
| Sell Pack Height | 71 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.54 kg | |
| Power Dissipation at Rated Current Value | 61 W | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen A300610 used for?
The Mersen A300610 provides high-speed short-circuit protection for semiconductor devices installed in industrial drives, converters, rectifiers and other power electronic equipment.
What is the rated current of the Mersen A300610?
The Mersen A300610 has a rated current of 630 A.
What voltage is the A300610 rated for?
The fuse is rated for up to 1250 V AC under IEC specifications and 1300 V AC under UL specifications.
What does the aR fuse classification mean?
The aR classification identifies a partial-range fuse with an ultra-fast operating characteristic developed specifically for short-circuit protection of semiconductor devices.
Does the A300610 provide overload protection?
An aR semiconductor fuse is primarily intended for short-circuit protection. Appropriate overload protection should be provided separately by the equipment’s monitoring, control or protective system.
Trusted by Power Electronics Professionals
Mersen Protistor® fuses are specified by industrial engineers, system integrators and equipment manufacturers for dependable high-speed protection of critical semiconductor and power-conversion equipment.
