# Are all DC plugs the same size?

## Are all DC plugs the same size?

Connector sizes Voltage is often unspecified, but may be up to 48 V with 12 V typical. The smaller types usually have lower current and voltage ratings. It is quite possible that new sizes will continue to appear and disappear.

How do I know what size DC jack I need?

If you go into a shop you can compare and test the connector size, or if you are technically minded you can measure the size of the port and pin yourself. If you are measuring you need the diameter of the center pin for the (ID) and the inner diameter of the port (OD).

### What size is DC Jack?

Many non-proprietary co-axial power plugs are 5.5 mm (0.22 in) in outside diameter (OD) and 9.5 mm (0.37 in) in length. Two pin sizes are common in the jacks for this size plug body, 2.1 mm (0.083 in) and 2.5 mm (0.098 in), and the plugs should match.

Which is positive and negative in DC Jack?

The center positive drawing on the left indicates that the center (tip) of the output plug is positive (+) and the barrel of the output plug is negative (-).

#### What does 2.54 mm pitch mean?

Here are a couple of the most common pitches in metric and standard units: 0.1 inches = 2.54mm (standard for breadboards)

Can I use 12V adapter for 5V?

The device will very likely burn out. In addition, depending on what the device is and the capacity of the 12V supply, connecting a 12V supply to a device rated 5V max could lead to a hazard – fire, explosion, etc.

## Can I use 12V 2A for 5V device?

Can I use a 5V 2A charger with a 5V 1a device?

Yes, it is absolutely safe to charge a device with a charger that has more current capacity than needed. Since the voltage is held constant (5V), the only factor that determines current draw is the load (another term for resistance) the device places on the charger.

### Is 12V same as cigarette lighter?

The 12V socket, also known variously as a car cigarette lighter or 12V auxiliary power outlet, is the primary method by which power is delivered to portable electronics in cars, trucks, recreational vehicles, boats, and in a handful of other contexts.

Which is positive and negative in DC jack?