Is it OK to put a 5 amp fuse in a 3 amp plug?
If they have simply run out of 3amp then of course not. IMHO you must investigate why the device is blowing the three amp fuse if indeed the 3 amp fuse is the recommended value, it may have a fault. Simply changing it for a 5 because it is bothersome is foolhardy, and certainly not best practice.
What are the types of fuses in common use?
Different Types of Fuses – Constriction, Working & Characteristics
- DC Fuses.
- AC Fuses.
- Cartridge Fuses.
- D – Type Cartridge Fuse.
- HRC (High Rupturing Capacity) Fuse or Link Type Cartridge Fuse.
- High Voltage Fuses.
- Automotive, Blade Type & Bolted Type Fuses.
- SMD Fuses (Surface Mount Fuse), Chip , Radial, and Lead Fuses.
What kind of Fuse do I need for a 240 V power supply?
The datasheet says the module takes 70 mA continuous at 240 VAC input for 5 W output. You could use a 1 A mains fuse. It also says the inrush current could be up to 25 A, so you need a slow-blow (a.k.a. timed or time-delay) fuse. If the inrush current tends to blow the 1 A fuse, use a 3 A fuse.
How many Watts Does a mains fuse take?
The fuse is to protect against excessive current, so you need to look at the current rating of the device. The datasheet says the module takes 70 mA continuous at 240 VAC input for 5 W output. You could use a 1 A mains fuse.
Do you need a 2nd fuse for a PSU?
No need for 2nd fuse, if you have one on the primary side. If your power supply is worth anything, it has also an inner thermal fuse, which will prevent destroying the PSU itself. Thanks for contributing an answer to Electrical Engineering Stack Exchange!
What are the different sizes of DC fuses?
There are numerous physical sizes of fuses for electronics, including subminiature fuses. The most common ferrule designs are 5x15mm, 5x20mm and 6.3x32mm (¼ in. x 1¼ in.). Ferrule fuses are generally mounted in fuse clips or holders with some available with axial leads for soldering directly onto a PCB.