18V DC Power Supplies | McMaster-Carr

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18V DC

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	Current Current

	Connection Type Connection Type


Straight Blade	Barrel

	End ID End ID

2.1 mm

2.5 mm

	Polarity Polarity

	Positive
	Negative

	Frequency Frequency

50Hz

60Hz

	Number of Blades Number of Blades

	2		3

	Length Length

5 ft.

6 ft.

	End Type End Type

	Plug

	End Shape End Shape


Straight	90° Elbow

	Specifications Met Specifications Met

CCC Marked

CE Marked

DOE Level VI Efficiency

ETL

EU CoC Tier 2 Efficiency

GS Certified

RCM Marked

	Connection Connection

Input

Output

	End Length End Length

10 mm

11 mm

	Low-Voltage Output Type Low-Voltage Output Type

LPS

	Maximum Temperature Maximum Temperature

Less than 110° F

110° to 124° F

	Minimum Temperature Minimum Temperature

35° F

	Regulation Type Regulation Type

Switching

	Gender Gender

Male

	Protections Provided Protections Provided

Overvoltage

Overcurrent

Short Circuit

	Color Color

	Black

	Shock Protection Class Shock Protection Class

	NEMA Style NEMA Style

	1-15

	IEC Style IEC Style

	C14
	C8

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31 Products

AC to DC Adapter Cords


	Negative	NEMA 1-15 Plug
	Positive

Plug these adapter cords into a standard outlet and they change AC voltage to DC voltage, so you can power many electronic devices.

When selecting a cord, make sure the DC voltage and amps for the barrel output connection can handle the requirements of your device. Choosing a DC voltage and amps that are much higher than you need will not improve performance.

Next, the polarity of the adapter cord and your device must be the same. Look for the polarity illustration on your device or the adapter cord you’re replacing and pick a cord to match.

All of these cords use switching regulation, which means they produce the stated voltage despite fluctuations in your outlet’s power and the power being drawn by your device. It also means they won’t get too hot.

With an LPS low-voltage output, if something fails inside these cords, they’ll limit the risk of electrical shocks. Class II shock protection means they have two levels of insulation, which also prevents electrical shocks. All have passed strict U.S. and Canadian safety standards.

These cords meet U.S. DOE (Department of Energy) Level VI standards for energy efficiency when they're in-use, as well as when they're plugged in but not in use.

Barrel Output Connection					Straight-Blade Input Connection
Voltage	Current, A	End ID, mm	End OD, mm	End Shape	Voltage	Current, A	NEMA Style	End Shape	Lg., ft.	Protections Provided	Color		Each
Negative Polarity
18V DC	0.45	2.1	5.5	Straight	120V AC, 240V AC	0.4	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	00000
18V DC	0.45	2.5	5.5	Straight	120V AC, 240V AC	0.4	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	0000
18V DC	0.66	2.1	5.5	Straight	120V AC, 240V AC	0.4	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	00000
18V DC	0.66	2.5	5.5	Straight	120V AC, 240V AC	0.4	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	00000
18V DC	1	2.1	5.5	Straight	120V AC, 240V AC	0.5	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	00000
18V DC	1	2.5	5.5	Straight	120V AC, 240V AC	0.5	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	0000000	00000
18V DC	1.33	2.1	5.5	Straight	120V AC, 240V AC	0.8	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	00000
18V DC	1.33	2.5	5.5	Straight	120V AC, 240V AC	0.8	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	00000
18V DC	2	2.1	5.5	Straight	120V AC, 240V AC	1	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	00000
18V DC	2	2.5	5.5	Straight	120V AC, 240V AC	1	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	00000
Positive Polarity
18V DC	0.45	2.1	5.5	Straight	120V AC, 240V AC	0.4	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	0000
18V DC	0.45	2.5	5.5	Straight	120V AC, 240V AC	0.4	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	0000
18V DC	0.66	2.1	5.5	Straight	120V AC, 240V AC	0.4	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	00000
18V DC	0.66	2.5	5.5	Straight	120V AC, 240V AC	0.4	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	00000
18V DC	1	2.1	5.5	Straight	120V AC, 240V AC	0.5	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	00000
18V DC	1	2.5	5.5	Straight	120V AC, 240V AC	0.5	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	00000
18V DC	1.33	2.1	5.5	Straight	120V AC, 240V AC	0.8	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	00000
18V DC	1.33	2.5	5.5	Straight	120V AC, 240V AC	0.8	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	00000
18V DC	2	2.1	5.5	Straight	120V AC, 240V AC	1	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	00000
18V DC	2	2.5	5.5	Straight	120V AC, 240V AC	1	1-15	90° Elbow	6	Overvoltage, Short Circuit	Black	000000000	00000

Detachable-Cord AC to DC Adapters

IEC C8 Input and Barrel Output

IEC C14 Input and Barrel Output

Barrel Output

IEC C8 Input

Positive

IEC C14 Input

Pair these adapters with power cords that have the plug style and cord length you need to run DC-powered devices from your outlet. Unlike adapters with bodies that plug directly into an outlet, the body of these adapters rests on a desk or the floor, so it won’t block multiple outlets.

When selecting an adapter, make sure the DC voltage and amps for the barrel or pin output connection can handle the requirements of your device. Choosing a DC voltage and amps that are much higher than you need will not improve performance. For adapters with a barrel output connection, the polarity of your power cord and your device must be the same. Look for the polarity illustration on your device or the adapter you’re replacing and make sure your power cord matches it.

Adapters with an IEC C8 input connection require power cords with a C7 socket. Those with an IEC C14 input connection require power cords with a C13 socket.

These adapters use switching regulation, which means they produce the stated voltage despite fluctuations in your outlet’s power and the power being drawn by your device. It also means they won’t get too hot.

If something fails inside the adapters, the LPS low-voltage output on most adapters will limit the risk of electrical shocks. Adapters with Class II shock protection have two levels of insulation that also prevent electrical shocks. Those with Class I shock protection prevent electrical shocks with a combination of insulation and a protective ground. All have passed strict U.S., Canadian, and European Union safety standards.

All of these adapters meet U.S. DOE (Department of Energy) Level VI standards for energy efficiency when they're in-use, as well as when they're plugged in but not in use. Many also meet EU CoC (European Union Code of Conduct) Tier 2 energy efficiency standards for the same uses.

Barrel/Pin Output Connection						Straight-Blade Input Connection
Voltage	Current, A	Polarity	End ID, mm	End OD, mm	End Shape	Voltage	Current, A	End Shape	Lg., ft.	Shock Protection Class	Protections Provided	Color		Each
IEC C8 Input × Barrel Output
18V DC	1.1	Positive	2.1	5.5	Straight	120V AC, 240V AC	0.5	Straight	5	II	Overcurrent, Overvoltage, Short Circuit	Black	00000000	000000
18V DC	2	Positive	2.1	5.5	Straight	120V AC, 240V AC	1	Straight	5	II	Overcurrent, Overvoltage, Short Circuit	Black	00000000	00000
18V DC	3.6	Positive	2.1	5.5	Straight	120V AC, 240V AC	1.4	Straight	5	II	Overcurrent, Overvoltage, Short Circuit	Black	00000000	00000
IEC C14 Input × Barrel Output
18V DC	1.1	Positive	2.1	5.5	Straight	120V AC, 240V AC	0.5	Straight	5	I	Overcurrent, Overvoltage, Short Circuit	Black	00000000	00000
18V DC	2	Positive	2.1	5.5	Straight	120V AC, 240V AC	1	Straight	5	I	Overcurrent, Overvoltage, Short Circuit	Black	00000000	00000
18V DC	3.6	Positive	2.1	5.5	Straight	120V AC, 240V AC	1.4	Straight	5	I	Overcurrent, Overvoltage, Short Circuit	Black	00000000	00000
18V DC	5	Positive	2.1	5.5	Straight	120V AC, 240V AC	1.2	Straight	5	I	Overcurrent, Overvoltage, Short Circuit	Black	00000000	00000

International AC to DC Adapter Cords

Adapter

AS 3112 Plug (Australia and New Zealand)

BS 1363 Plug (United Kingdom )

CEE 7/16 Plug (European Union)

NEMA 1-15 Plug (North America)

Negative

Positive

There’s no need for multiple adapter cords or converters, simply swap out the input plugs on these cords to match the outlets of the region you’re in. Use these adapter cords to run DC-powered devices from an outlet in a variety of different countries.

Next, the polarity of the adapter cord and your device must be the same. Look for the polarity illustration on your device or the adapter cord you’re replacing and pick a cord to match.

These cords meet U.S. DOE (Department of Energy) Level VI standards for energy efficiency when they're in-use, as well as when they're plugged in but not in use.

Barrel Output Connection					Straight-Blade Input Connection
Voltage	Current, A	End ID, mm	End OD, mm	End Shape	Voltage	Current, A	End Shape	Lg., ft.	Protections Provided	Color		Each
Negative Polarity
AS 3112, BS 1363, CEE 7/16, × NEMA 1-15 Plugs
18V DC	1.3	2.1	5.5	Straight	120V AC, 240V AC	0.8	90° Elbow	5	Overvoltage, Short Circuit	Black	0000000	000000
18V DC	1.3	2.5	5.5	Straight	120V AC, 240V AC	0.8	90° Elbow	5	Overvoltage, Short Circuit	Black	0000000	00000
Positive Polarity
AS 3112, BS 1363, CEE 7/16, × NEMA 1-15 Plugs
18V DC	1.3	2.1	5.5	Straight	120V AC, 240V AC	0.8	90° Elbow	5	Overvoltage, Short Circuit	Black	0000000	00000
18V DC	1.3	2.5	5.5	Straight	120V AC, 240V AC	0.8	90° Elbow	5	Overvoltage, Short Circuit	Black	0000000	00000

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