StarTech.com 3 ft USB to Type M Barrel 5V DC Power Cable - Power cable - USB (power only) (M) to DC jack 5.5 mm (M) - 3 ft - molded - black (USB2TYPEM)

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Remember: the input of the device should be the same as the output of the adapter. This includes polarity. If the device has a DC input of +12V / 5.4A, get an adapter with a DC output of +12V / 5.4A. If you have a universal adapter, ensure it has the proper current rating and choose the correct voltage and polarity. Fudging It: What Happens if You Use the Wrong Adapter? The so-called "Mini IEC connectors" are unrelated and not even standardized by the IEC at all; they are called that because they resemble a smaller IEC C13 connector. If you assume that the device has no indication whatsoever of input voltage, current, or polarity, how is it possible to find an adapter which will make it work without trial and error which could also be called trial and fryer?

You might find both the voltage and the current elsewhere on the device, on the bottom or inside a battery compartment cover, or in the manual. Again, look for the polarity by either noting a + or – symbol or the polarity diagram. e.g., Samsung makes TVs, but doesn’t make wiring used inside their tvs or the power, AV, etc cords. Parts & supplies are outsourced from third party manufacturers.

5v Power Cables

The Saf-D-Grid [21] connector delivers up to 600VDC at up to 30A, with the connector occupying the same space as an IEC 320 C13/C14 connector normally limited to 250VAC at 10A. The connector can also be disconnected under load. But next week I have a device coming that also has a US 2 pin plug but is rated much lower than a set of hair straighteners, rated at 5v/2a. Each AC/DC power adapter is specifically designed to accept a certain AC input (usually the standard output from a 120 V AC outlet in your home) and convert it to a particular DC output. Likewise, each electronic device is specifically designed to accept a certain DC input. The key is to match the DC output of the adapter to the DC input of your device. Determining the outputs and inputs of your adapters and devices is the hard part. The connector is circular, with the male connector having two pins placed symmetrically inside a circular shield, and the female connector having two receptacles surrounded by a circular groove to accept the male shield, in turn surrounded by a second circular shield which projects 6mm (0.24in) past the mating surface and encloses the male connector. (It somewhat resembles a smaller IEC 60309 connector.) Like the IEC 62735, this connector was designed to replace the IEC connector used in computer power supplies so that they can be operated from 380–400VDC instead. Introduced in January 2009, [22] it arrived before the competing IEC standard, however despite this it has not seen widespread use.

The male shield has two keys projecting inwards, which fit into notches in the female body. The larger key is at right angles to the pins, 2.0±0.1mm (0.079±0.004in) wide and ending at a radius of 4.9±0.1mm (0.193±0.004in) from the connector centre. The corresponding notch is 2.3±0.1mm (0.091±0.004in) wide and ends at a radius of 4.6±0.1mm (0.181±0.004in) from the connector centre.

In the European Union, the Radio Equipment Directive 2021/0291, requires new smartphones to use USB-C as a universal charger by the end of 2024, and laptops by 2026. [14] [15] Other DC connectors [ edit ] Heathkit power supply female connector for tube equipment Power adapters are a bit like canned food. Some manufacturers put a lot of information on the label. Others put just a few details. And if there is no information on the label, proceed with extreme caution. I have some universal converters that work fine with Chinese 2 pin ac adapters of the same rating but know that China uses a 220V, 50HZ system, whereas the US is 120V/60HZ.

Another example of this is zippers. Most are stamped ykk or ideal/i. These are zipper manufacturers nearly all clothing companies source their zipper supplies from. In the past I experienced the same as you with 99% of universal or “multi-voltage” power adapters to be cheaply made with little to no documentation or practical information about how to use them with whatever electronic device you are trying to power until I found the ProTechTrader ones. They have instructions that are in a way similar to the post explaining the basic usage and how to properly match the voltage and amperage to the current needed by the device. They also had a nearly identical disclaimer as you mentioned as well as reversible polarity tips which I haven’t seen available on most of the others floating around. I have to see if I can find a link to the manual online somewhere to show you what I mean, but this post is excellent and goes into even more detail anyway. I got a few of the 30w ones here:It’s a supply chain thing. Device/appliance manufacturers generally don’t manufacture their own parts & supplies. Next, you want to look at your device for the DC input. You’ll usually see at least the voltage near the DC plug receptacle. But you also want to make sure the current matches, too. Your article starts out describing my dilemma almost to a ‘T,’ then never does really answer the question, how do I know which adapter will work with which device. Some adapters DO include the brand of the device/appliance they came with on the same label with the specs (great if you only have ONE device of that brand).

I am asking because on other forums, I learnt (I didn’t know) that Super Nintendos and Sega Genesis models 1 and 2 have internal voltage-current regulators which convert all power to 5V, despite the incoming power; that they could handle voltages from 3V up to 15V adaptors! That being said, I don’t recommend fudging the margin under the assumption that you can do the equivalent of driving 5 MPH over the speed limit with your electronic devices. The margin is there for a reason, and the more complicated the device, the more potential for something to go wrong.

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And other guys were saying that there’s a “tolerance” range of 2V on all systems; that you can power a Sega Genesis model 2 with a 12V 1A DC without harming the console and that they have been doing that for years! Powerpoles have been adopted as a standard 12V DC connector by most RACES Radio Amateur Civil Emergency Service organizations and ARES Amateur Radio Emergency Service units. They deliver good current capability for their sizes. They also facilitate very easy pluggability for those without good eyesight or good lighting. However, they can be damaged relatively easily and can occasionally separate from each other easily with minimal force unless additional retaining measures are taken.