Barrel Connectors
Barrel connectors handle DC power delivery in everything from laptops to industrial controllers. You probably know them as those cylindrical plugs on wall adapters, but the category covers a lot of ground: standard 2.1mm and 2.5mm center pins, 3.5mm types for audio gear, locking versions that won't vibrate loose, and panel-mount jacks for chassis installation. Some carry just power, others include extra contacts for battery charging or device detection. Engineers usually start with the center pin diameter and current rating, then check the mounting style—PCB pins versus solder lugs versus panel threads. Mating cycles matter if the connection gets daily use, though many catalogs don't publish that data clearly. Here's the sourcing reality: the common 5.5mm OD types are commodity items with price pressure, while the less common EIAJ sizes or locking types can have spotty availability. We've seen plenty of counterfeit barrel jacks that look fine but have spring contacts that lose tension after fifty cycles, so traceability on even these simple parts matters more than you'd expect. Some buyers prefer tape and reel for automated assembly, others want bulk packaging for hand soldering, and that preference can swing your per-unit cost by 15-20%. You can check current stock and pricing at icxing.com, and we're happy to quote on specific center pin sizes or unusual configurations.
Frequently Asked Questions
What is the difference between a barrel connector and a DC power jack?
A barrel connector is a type of DC power jack with a cylindrical shape and a central pin or hole. While all barrel connectors are DC power jacks, not all DC power jacks use the barrel connector design. Barrel connectors are widely used for their simplicity and cost-effectiveness.
How do I measure the size of a barrel connector?
Measure the outer diameter (OD) and inner diameter (ID) of the barrel using calipers. Common sizes include 5.5 mm OD with 2.1 mm or 2.5 mm ID. Also check the polarity and voltage/current ratings to ensure compatibility with your device.
Can I use a barrel connector with a different voltage rating?
Using a barrel connector with a different voltage rating is not recommended. Exceeding the rated voltage can cause overheating or damage, while using a lower voltage may result in insufficient power delivery. Always match the voltage and current ratings specified for your device.
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- Power Connectors (293)
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| Image | Part | Manufacturer | Description | Stock | Action | |
|---|---|---|---|---|---|---|
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CUI Devices | CONN JACK STEREO... |
1,890
In-stock
|
Inquiry | ||
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CUI Devices | CONN JACK 4COND 3.... |
2,440
In-stock
|
Inquiry | ||
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CUI Devices | CONN RCA JACK MON... |
4,290
In-stock
|
Inquiry | ||
|
CUI Devices | CONN PLUG MONO 2.5... |
6,140
In-stock
|
Inquiry | ||
|
CUI Devices | CONN PLUG MONO 3.5... |
1,820
In-stock
|
Inquiry | ||
|
CUI Devices | CONN JACK STEREO... |
6,550
In-stock
|
Inquiry | ||
|
CUI Devices | CONN JACK MONO 3.5... |
5,300
In-stock
|
Inquiry | ||
|
CUI Devices | CONN JACK MONO 3.5... |
5,390
In-stock
|
Inquiry | ||
|
CUI Devices | CONN JACK MONO 3.5... |
3,730
In-stock
|
Inquiry | ||
|
CUI Devices | CONN RCA JACK MON... |
6,530
In-stock
|
Inquiry | ||
|
CUI Devices | CONN RCA JACK MON... |
6,460
In-stock
|
Inquiry | ||
|
CUI Devices | CONN RCA JACK MON... |
4,710
In-stock
|
Inquiry | ||
|
CUI Devices | CONN RCA JACK MON... |
7,170
In-stock
|
Inquiry | ||
|
CUI Devices | CONN JACK 4COND 3.... |
7,830
In-stock
|
Inquiry | ||
|
CUI Devices | AUDIO PLUG, PCB M... |
1,410
In-stock
|
Inquiry | ||
|
CUI Devices | CONN PLUG STEREO... |
3,630
In-stock
|
Inquiry | ||
|
CUI Devices | CONN JACK MONO 2.5... |
4,380
In-stock
|
Inquiry | ||
|
CUI Devices | AUDIO PLUG, 3.5 MM,... |
3,950
In-stock
|
Inquiry | ||
|
CUI Devices | CONN JACK STEREO... |
5,640
In-stock
|
Inquiry | ||
|
CUI Devices | CONN RCA JACK MON... |
6,410
In-stock
|
Inquiry |