Why Choose the MERSEN FUSE A 070 URD 31 LLI 0250 A070UD31LLI250?
£127.70
The Mersen K300159 is an industrial high-speed semiconductor fuse designed to protect sensitive power electronic components against damaging short-circuit currents. As part of the established Mersen Protistor® range, it is intended for equipment containing diodes, thyristors, IGBTs and other semiconductor devices that require rapid and dependable fault protection.
The K300159 limits peak fault current and electrical energy before excessive thermal stress can damage connected components. Its fast operating characteristics help improve system reliability, minimise costly equipment damage and reduce unplanned downtime in demanding industrial power applications.
Featuring a robust square-body construction, the Mersen K300159 is suitable for coordinated protection in motor drives, industrial converters, rectifiers, uninterruptible power supplies and other power electronic systems. Its complete current rating, voltage rating, terminal arrangement and energy-limiting characteristics should be confirmed against the official Mersen technical documentation before installation.
Semiconductor devices can be damaged by excessive fault energy before conventional circuit protection has time to operate. High-speed semiconductor fuses respond rapidly to short-circuit conditions, limiting peak current and reducing the amount of energy transferred to valuable power electronic components.
Mersen Protistor® fuses are used in industrial power conversion and motor-control systems where reliable interruption, low let-through energy and effective coordination with semiconductor devices are essential. Correct fuse selection should consider system voltage, continuous current, prospective fault current, cooling conditions and the protection requirements of the connected equipment.
| Manufacturer | Mersen |
|---|---|
| Series | Protistor® |
| Model | K300159 |
| Product type | High-speed semiconductor fuse |
| Fuse construction | Industrial square body |
| Protection application | Semiconductor and power electronic devices |
| Protected components | Diodes, thyristors and IGBTs |
| Operating characteristic | High-speed semiconductor protection |
| Installation environment | Industrial electrical equipment |
| Mounting requirement | Use the specified compatible fuse holder or bolted connection |
| Rating verification | Confirm voltage, current and I²t values against the official Mersen datasheet |
The Mersen K300159 provides high-speed short-circuit and overcurrent protection for semiconductor devices and industrial power electronic equipment.
It is intended for systems containing sensitive components such as IGBTs, thyristors and power diodes.
A high-speed fuse interrupts fault current and limits let-through energy more rapidly than a conventional fuse, helping prevent serious damage to sensitive electronic components.
It may be suitable for variable-speed drive and converter applications when its confirmed voltage, current, I²t and mounting characteristics meet the equipment manufacturer's requirements.
Confirm the complete Mersen reference and compare the voltage rating, current rating, operating class, dimensions, terminal arrangement and I²t characteristics with the original fuse and equipment specification.
Mersen Protistor® high-speed fuses are specified across industrial power systems to provide rapid fault interruption and dependable protection for sensitive semiconductor components.
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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...