DC-005B: 5.5×2.5mm DC Power Jack, Horizontal PCB Mount
The DC-005B is a 5.5x2.5mm DC power connector in jack form: a horizontal, through-hole PCB-mount female socket that solders onto the board and receives the barrel plug from the power supply. It has a 5.5mm outer diameter and a 2.5mm center pin, rated 5A at 12V DC (24V max), with a mating life of at least 5,000 cycles. RoHS compliant.
5.5×2.5mm DC power connector: Product Overview of the DC-005B Power Jack
The DC-005B is a 5.5 x 2.5mm barrel connector that lies flat on the board with its barrel opening facing the board edge, so the plug enters parallel to the PCB surface. The jack is soldered on through-hole pins, which hold it against the force of plugging and unplugging. The contacts are nickel-plated copper alloy and the housing is PBT/Nylon 66, rated UL94 V-0.
5.5×2.5mm DC Power Connector or 5.5×2.1mm: Which Size Does Your Power Supply Use
5.5×2.1mm is the more common size in this family; 5.5×2.5mm is the less common one. They share the same 5.5mm barrel and differ only in the center pin. The DC-005B has a 2.5mm center pin, so it takes 5.5×2.5mm plugs. A 5.5×2.1mm plug will not fit it, because the pin is thicker than the plug’s center hole. The risk runs the other way: a 2.5mm plug does fit onto a 2.1mm jack’s thinner pin, but the contact is loose and cuts out when the cable moves. Measure the center hole of your plug with calipers before ordering. Our 5.5×2.1mm vs 5.5×2.5mm selection guide shows how, and the Wikipedia DC connector page gives background on the size conventions.
The jack does not set the polarity. By convention the center pin is positive and the barrel is ground, but that depends on how the supply and the jack terminals are wired, so confirm it before powering up. If you need a chassis-mount version with a threaded body and nut, see the DC-099 panel mount DC power jack 5.5×2.5mm.
DC-005B 5.5 x 2.5mm Female Connector Specifications
The table lists the ratings of the DC-005B, a 5.5 x 2.5mm female connector for horizontal PCB mounting. Check the center pin size and the current rating against your plug and your load before ordering.
| Parameter | Specification |
|---|---|
| Part Number | DC-005B |
| Connector Type | DC power jack, female |
| Mounting | Horizontal (right-angle), PCB through-hole |
| Outer Diameter | 5.5 mm ±0.05 mm |
| Center Pin Diameter | 2.5 mm ±0.05 mm |
| Polarity | Center positive by convention; set by wiring |
| Rated Voltage | DC 24 V max |
| Rated Current | 5 A at 12 V DC |
| Contact Resistance | ≤ 30 mΩ initial |
| Insulation Resistance | ≥ 100 MΩ at 500 V DC |
| Dielectric Withstanding Voltage | 500 V AC for 1 minute |
| Contact Material | Copper alloy, nickel-plated |
| Housing Material | PBT / Nylon 66, UL94 V-0 |
| Mating Cycles | ≥ 5,000 |
| Operating Temperature | -20 °C to +70 °C |
| RoHS Compliance | Yes |
5.5 x 2.5mm DC Barrel Connector: Features of the Horizontal PCB Mount Jack
As a 5.5 x 2.5mm DC barrel connector for PCB mounting, the DC-005B is chosen for how it sits on the board and how it holds up to plugging. These are the points that matter.
Horizontal Mounting
The plug enters parallel to the board, which suits products where the adapter connects at the edge and keeps the height above the PCB low.
Through-Hole Solder Joints
The pins pass through the board and are soldered on the other side, so the joint carries the load of repeated plugging instead of the pads alone.
Rated 5A at 12V DC
Size the copper traces and the wiring for your actual current, and check the datasheet for derating if the product runs warm.
5.5×2.5mm Size
Takes 5.5×2.5mm barrel plugs. A 5.5×2.1mm plug will not fit, which stops one kind of mismatch at assembly rather than in the field.
5,000-Cycle Mating Life
Nickel-plated copper alloy contacts with at least 5,000 mating cycles, for products that are plugged in and out during service.
UL94 V-0 Housing, RoHS Compliant
PBT/Nylon 66 housing with flame rating UL94 V-0, made to meet RoHS requirements for products sold in the EU.
Where the 5.5×2.5mm DC Power Jack Is Used
The 5.5×2.5mm DC power jack is used where a product takes power from an external 12V supply. Check the plug on your supply before choosing the size, because many supplies use 5.5×2.1mm instead.
5.5×2.5mm DC Power Jack – Frequently Asked Questions
How do I tell a 5.5×2.5mm plug from a 5.5×2.1mm plug?
Both have a 5.5mm outer barrel. The difference is the center hole: 2.5mm or 2.1mm. Measure it with calipers. The DC-005B, a 5.5 x 2.5mm female connector, has a 2.5mm center pin, so it takes the 2.5mm plug, and a 2.1mm plug will not fit it. A 2.5mm plug on a 2.1mm jack does fit but makes a loose contact, so check the plug before you choose the jack. The selection guide has the details.
Does the jack set the polarity?
No. On a 5.5 x 2.5mm barrel connector the center pin is positive by convention and the barrel is ground, but the polarity depends on how the supply and the jack terminals are wired. Look for the polarity symbol on your adapter and check continuity with a multimeter before powering the board.
Is the DC-005B a PCB mount or a panel mount jack?
It is a horizontal PCB-mount 5.5 x 2.5mm DC barrel connector, soldered onto the board. For a chassis-mount version with a threaded body and nut, see the DC-099 panel mount DC power jack.
Can it carry 12V at 5A continuously?
The 5.5×2.5mm DC power jack is rated 5A at 12V DC. In a design, the traces and the solder joints also have to carry that current, so size them for the load and leave margin if the product runs warm. Our barrel jack guide for power supplies covers derating and layout.
Is the DC-005B waterproof?
No. It is not rated for water or dust ingress. If your product needs a sealed power input, contact us and we will suggest a suitable option.
Can I get a free sample?
Yes, for qualified projects. Email sales@vistarelectronics.com with your company name, application and the part number DC-005B.
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