USB A 3 5mm DC Cable to DC Female Socket, 5 V Tap

Overview

A usb a 3 5mm dc cable takes 5 V from a USB-A host and presents it on a DC 3.5 mm coaxial female socket. Note the socket: this assembly is the counterpart to a device or a lead that already has a 3.5 mm male plug. It is used where equipment was shipped with a 3.5 mm barrel supply and the installer wants to run it from USB – a power bank, a vehicle USB port, or a hub that is already in place.

Key Specifications

Connector A	USB Type-A male
Connector B	DC 3.5 mm female socket
Output	5 V DC from USB host
Jacket	Black PVC
Polarity	Center positive (standard)
Conductor	Stranded copper; gage stated per your drawing
Length	Stated per your drawing
Application	Small DC gear with a 3.5 mm jack

Socket or plug – which half do you need?

Half the wrong orders on small-barrel adapters come from not reading which gender is on which end. This one ends in a female socket, which means it accepts a plug. If your device has a socket and you want to feed it, you need a cable ending in a male plug, not this one.

What the device has	What the cable must end in	This assembly
A 3.5 mm male plug on its supply lead	A 3.5 mm female socket	Yes – correct pair
A 3.5 mm female jack on the device	A 3.5 mm male plug	No – use the male version
A 5.5 x 2.1 mm jack	A 5.5 x 2.1 mm plug	No – different barrel
A 3.5 mm audio jack	Not a power part at all	No – do not connect

The last row is worth repeating. A 3.5 mm audio socket and a 3.5 mm coaxial power jack are dimensionally similar enough to be confused by eye, and feeding 5 V into an audio input destroys it. If the device documentation says “audio”, “line in” or “headphone”, stop and re-read the label.

The small-barrel size map

3.5 mm is an outside diameter, and the family hides several different center contacts under it. Confirm the inner dimension before you commit to a production quantity.

Callout	OD x ID (mm)	Where it appears	Note
3.5 x 1.35	3.5 x 1.35	Very common small barrel, often cross-listed as 3.5 x 1.3	Measure the jack center pin
3.5 x 1.3	3.5 x 1.3	Mini routers, label printers, hobby gear	The 3513 callout
3.5 x 1.1	3.5 x 1.1	Some compact consumer devices	Less common; confirm
2.5 mm	2.5 x (per device)	Legacy handheld and hobby gear	Different family
4017	4.0 x 1.7	Mini laptops, portable DVD	Larger shell

If you are supplying into several unknown devices, the adapter set is the cheaper first purchase: it tells you which size you actually need before you commit to a run.

What the USB-A host will actually deliver

The USB port sets the ceiling, not the cable. A standard USB 2.0 port is defined for 500 mA and a USB 3.x port for 900 mA; a port built to the Battery Charging specification can advertise up to 1.5 A. Those are the values defined by the specifications for the port, and the current your assembly is verified to is the one stated on your drawing.

Add up every load on the port before you plug in, including startup surges.
A multi-port charger with a shared budget does not give each port its marked figure.
At 5 V a modest drop is a large percentage – measure at the device.
If the device browns out, thicker and shorter beats a bigger charger.

Typical applications for this usb a 3 5mm dc cable

Running legacy 3.5 mm barrel gear from a power bank or USB hub
Hobby and bench builds documented with a 3.5 mm coaxial power jack
Small routers and modem DC inputs in the field
Trade-show and demo kits where mains outlets are scarce
Service kits that need one cable to cover several small devices

How to specify your build

Barrel size – outside and inside diameter, measured.
Gender – socket or plug on the device end.
Polarity – center positive unless stated otherwise.
Load current, steady and peak.
Length and conductor gage.
Jacket color and any print.
Quantity.

Workmanship and testing

USB A builds are assembled and inspected to IPC/WHMA-A-620 Class 3 criteria, with ISO 9001 as the quality system over 32 to 12 AWG work. continuity and pinout are verified on each USB assembly before packing, and seal checking is quoted whenever an ingress rating is on the drawing.

RoHS and REACH declarations are provided per project together with the agreed test reports; the documentation scope is listed under certifications and compliance. If your drawing specifies a UL style, we build to that drawing and supply the UL reference with the shipment instead of substituting an equivalent. Injection parameters for this part are developed against the jacket material using the approach documented under overmolding and injection molding. Related reading: what outdoor duty does to a jacket. Any tooling we cut for this part stays yours, maintained in our own tool room under your part reference.

Custom builds and ordering

USB A prototype builds start from 1 to 50 pcs and are out in 3 working days. Production is quoted from 500 pcs at 14 working days after sample approval. Your part number and labeling go on OEM and ODM USB shipments, and we provide material certificates and first-article reports when asked. We hold 100 sets of mold tooling in house, so a standard body needs no tooling time and a new one adds about 10 working days.

Related DC plug power cables

Full range: DC plug power cable assemblies.

Frequently Asked Questions

Is the 3.5 mm end a plug or a socket?

A socket. It accepts a 3.5 mm male plug. If your device has a jack and needs feeding, you want the version that ends in a male plug.

Will it work with 3.5 x 1.35 mm gear?

Often yes, but confirm. The two callouts are frequently cross-listed and the difference is small enough to matter. Measure the center pin or try the adapter set first.

Can I use it for audio?

No. A 3.5 mm power jack and a 3.5 mm audio jack are not interchangeable, and connecting power to an audio input will damage the device.

How much current can it carry?

Whatever the host port advertises and the conductor is sized for. Tell us the load and the run length and we will size the gage; the verified figure is stated on your drawing.