High-speed semiconductor protection fuse with aR characteristic, 250A rating, ceramic body, striker indication system, and open slot blade terminals for bolted mounting.
£155.56
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.
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.
| 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 |
The Mersen A300610 provides high-speed short-circuit protection for semiconductor devices installed in industrial drives, converters, rectifiers and other power electronic equipment.
The Mersen A300610 has a rated current of 630 A.
The fuse is rated for up to 1250 V AC under IEC specifications and 1300 V AC under UL specifications.
The aR classification identifies a partial-range fuse with an ultra-fast operating characteristic developed specifically for short-circuit protection of semiconductor devices.
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.
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.
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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...
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...