High-speed Protistor® fuse with striker and slotted blade terminals, rated 250A, 1250VAC IEC, 1300VAC UL, size 71, ceramic body, bolted mounting.
£149.90
The Mersen G300662 is a specialist high-speed semiconductor fuse designed to protect sensitive power electronic components against damaging short-circuit currents. As part of the established Mersen Protistor® fuse range, it is intended for demanding industrial systems in which rapid fault interruption and low let-through energy are essential.
Unlike conventional general-purpose fuses, high-speed semiconductor fuses operate extremely quickly to restrict the electrical and thermal energy released during a fault. This helps protect valuable components such as IGBTs, thyristors, diodes, rectifiers and power modules while reducing the risk of extensive equipment damage and unplanned downtime.
The G300662 features a robust industrial construction suited to power-conversion and motor-control equipment. Its high interrupting performance, efficient arc-quenching system and dependable electrical characteristics make it suitable for use in variable frequency drives, inverters, UPS systems, rectifiers and renewable-energy installations.
Power semiconductor devices can be damaged by excessive current in a fraction of a second. The Mersen G300662 is engineered to respond rapidly to severe fault currents, limiting the peak current and thermal energy that can pass through the protected circuit.
This fast response helps preserve semiconductor modules and associated electrical components. Correct fuse selection can improve equipment reliability, simplify fault containment and reduce the cost and duration of maintenance following a short circuit.
| Item number | G300662 |
|---|---|
| Catalogue No | A130UD71LLI250 |
| Description | Square Body High-Speed Fuse Protistor® Size 71 aR 1250VAC IEC 1300VAC UL 250A With Striker Slotted Blades long |
| EAN/UPC Code | 3605340331813 |
| 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 | Slotted Blades |
| Product Width | 51 mm |
| Product Length | 157.4 mm |
| Product Height | 56.5 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 1.62 kg |
| Sell Pack Width | 155 mm |
| Sell Pack Length | 165 mm |
| Sell Pack Height | 60 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.54 kg |
| Power Dissipation at Rated Current Value | 61 W |
The Mersen G300662 is used to provide rapid short-circuit protection for semiconductor components installed in industrial drives, converters, rectifiers, inverters and other power electronic equipment.
No. It is a specialist high-speed fuse intended primarily for protecting sensitive semiconductor devices against short-circuit currents.
The G300662 can be used in appropriately rated circuits containing components such as IGBTs, thyristors, SCRs, diodes and rectifier modules.
Low let-through energy reduces the electrical and thermal stress placed on semiconductor devices during a fault, helping minimise component damage.
It is typically installed in compatible fuse holders, busbar systems or manufacturer-designed assemblies inside industrial power-conversion and motor-control equipment.
Mersen Protistor® high-speed fuses are widely used by electrical engineers and equipment manufacturers to provide rapid, dependable protection for sensitive semiconductor components in demanding industrial applications.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...