Why Choose the MERSEN FUSE 12,5 URD 71 ESF 0315 F300822? MERSEN FUSE 12,5 URD 71 ESF 0315 F300822 delivers robust, standards-compliant performance for demanding electrical applications. This model provides reliable protection and ease of installation, with all key features engineered for maximum safety and efficiency. Key Takeaways – Product Name: MERSEN FUSE 12,5 URD 71 ESF 0315 F300822 – Key Specs: See description below Frequently Asked Questions – What is the primary application? – Is this product certified? – What are the installation options? – What are the key benefits? – Where can I find technical data? Speed & Safety Benefits – Reliable Performance: Engineered for consistent results – Safe Operation: Built to meet modern standards – Quick Installation: Designed for installer convenience Key Features of MERSEN FUSE 12,5 URD 71 ESF 0315 F300822 – See full description below – Engineered for reliability – Technical support available What is the primary application?+ See product description for detailed use cases. Is this product certified?+ Consult technical data or documentation for certifications. What are the installation options?+ Refer to the installation manual or contact our team for guidance. What are the key benefits?+ Engineered for performance, reliability, and ease of use. Where can I find technical data?+ Technical datasheets are available on request or on our website.
£162.38
The Mersen F300822 is a Protistor® square body high-speed semiconductor protection fuse engineered to provide rapid fault clearance for demanding power electronic applications. Identified by the description 12.5 URD 71 ESF 0315, this fuse is designed to protect sensitive semiconductor devices including IGBTs, thyristors, diodes and rectifier modules from damaging short-circuit currents.
Manufactured as part of Mersen's trusted Protistor® range, the F300822 features an aR ultra-fast operating characteristic, ensuring extremely low let-through energy (I²t) to minimise stress on valuable semiconductor components. Its square body construction and striker-equipped design make it suitable for demanding industrial installations where reliability and fast fault interruption are essential.
With a 315 A current rating and a 1250 V AC voltage rating, the F300822 is ideally suited to industrial drives, renewable energy systems, power converters, UPS equipment and other high-power electronic applications requiring dependable semiconductor protection.
The Mersen F300822 is designed to interrupt extremely high fault currents before they can damage expensive semiconductor devices. Its ultra-fast response and low let-through energy help maximise equipment reliability while reducing maintenance costs and costly production downtime.
Protistor® semiconductor fuses are widely specified by equipment manufacturers where dependable protection of power semiconductors is essential, including industrial automation, renewable energy systems and heavy-duty power conversion equipment.
The F300822 is a high-speed semiconductor protection fuse designed to protect sensitive power electronic devices such as IGBTs, thyristors and diodes against short-circuit faults.
The Mersen F300822 has a 315 A current rating.
This fuse is rated for 1250 V AC.
The aR designation identifies an ultra-fast semiconductor protection fuse intended to provide short-circuit protection for power electronic devices.
It is commonly used in industrial drives, converters, UPS systems, renewable energy installations and other power electronic equipment requiring fast semiconductor protection.
Mersen Protistor® semiconductor fuses are trusted worldwide by electrical engineers, OEMs and industrial manufacturers for protecting valuable semiconductor equipment in demanding industrial environments.
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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...