AC to DC 12V 1.5A Power Adapter Supply, Plug UK 5.5mm x 2.1mm

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Many people are confused by amperage ratings and what they mean when it comes to power supplies and replacements. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. USB wall chargers have to provide the same voltage (like the article said, it’s fixed), but some are capable of providing higher amperage for those devices that can use it.

12V 1500mA 1.5A AC/DC 2.1mm Power adapter Power Supply

If you look closely at the small print on many power supplies, you’ll see they’re rated for anything from 100 to 250 volts. The output amperage must match or be greater than that required by the device being charged or powered.

I'm Leo Notenboom and I've been playing with computers since I took a required programming class in 1976. If a PSU is 50% efficient and is required to provide 50 Watts of power, 100 Watts will be drawn from the main supply. The input line voltage (wall or “mains” power) must be supported but is unrelated to compatibility with the device being charged or powered. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page. Your water analogy is incomplete: voltage is the water pressure, and amperage is the SIZE of the hose.

AC / DC Enclosed Power Supplies | Farnell UK 1.5kW AC / DC Enclosed Power Supplies | Farnell UK

A power supply changes a source electric current, such as a mains plug, to the correct voltage, frequency and current needed to operate the equipment safely. AC chargers are usually represented by a tilde (~), and pulsating DC chargers are indicated by a solid line over a dotted line, kind of like highway dividers where there’s no passing in one direction.If the charger cannot supply enough of the current that the device wants, if may decide that it doesn’t have enough to run. Here’s the catch: just because the physical plug fits into your device does not mean that the polarity is correct. I know that with my Dell laptops, if the chip in the charger goes bad (the chip that tells the Dell laptop that this charger is the correct charger for the computer), it will no longer charge the battery, and the laptop will draw less power (or amps – but Amps times Volts gives you Watts – or power) – thus slower laptop. Plug a device expecting 110 volts into a 220-volt socket, and you’ll probably see sparks followed by darkness as the circuit breaker trips.