Mersen R205037 fast-acting 5 x 20 mm miniature fuse with 1.25 A current rating, 250 V AC rating and axial lead mounting for electronic and semiconductor circuit protection.
£1.49
The Mersen R205037 is a high-performance 5 x 20 mm fast-acting miniature fuse designed to provide rapid overcurrent protection for sensitive electronic circuits and semiconductor devices. Manufactured as part of the trusted Mersen MI5 FC 250V AL series, this fuse combines dependable fault protection with a compact design suitable for a wide range of industrial and electronic equipment.
Featuring a 1.25 A current rating, 250 V AC voltage rating and axial lead mounting, the R205037 offers straightforward PCB installation while delivering fast interruption of overloads and short circuits. Its precision construction helps protect valuable components, minimise downtime and improve equipment reliability.
Designed for applications requiring fast fault clearance, the Mersen R205037 is suitable for industrial controls, instrumentation, power supplies, automation equipment and electronic assemblies where reliable circuit protection is essential.
Fast-acting miniature fuses are designed to interrupt fault currents quickly before sensitive electronic components can be damaged. The Mersen R205037 provides dependable protection against overloads and short circuits, helping extend equipment life while reducing maintenance costs.
Its compact dimensions and axial lead design make installation straightforward in printed circuit boards, power supplies, instrumentation and industrial control equipment where space is limited and reliable circuit protection is required.
| Current | 25 A |
|---|---|
| Voltage | 250 V |
| Manufacturer | Mersen |
| Series | MI5 FC 250V AL |
| Model | R205037 |
| Catalogue number | MI5FCP25V1.25 |
| Product type | Fast-acting miniature fuse |
| Fuse size | 5 x 20 mm |
| Rated current | 1.25 A |
| Rated voltage | 250 V AC |
| Characteristic | Fast (F) |
| Mounting | Axial leads |
| Compliance | RoHS |
| Application | Semiconductor and electronic circuit protection |
The R205037 is used to provide fast overcurrent protection for sensitive electronic circuits, semiconductor devices and industrial control equipment.
This fuse has a 1.25 A current rating.
The Mersen R205037 is rated for 250 V AC operation.
This model is a fast-acting (F) fuse designed to clear faults rapidly.
The fuse features axial leads, allowing direct mounting onto printed circuit boards or other electronic assemblies.
Mersen miniature fuses are trusted worldwide by equipment manufacturers, panel builders and maintenance engineers for delivering reliable circuit protection across industrial, electronic and automation 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...