Skip to content
PROMO CODE: FREESHIP for free economy shipping w/orders $49+
CODE: FREESHIP for free economy shipping w/orders $49+
PHC Enterprise DC barrel plug adapter converting 2.1 x 5.5mm to 1.7 x 4.0mm for RC and electronic devices
PHC Enterprise DC barrel plug adapter converting 2.1x5.5mm to 1.7x4.0mm right-angle plug for electronic devices.
PHC Enterprise DC barrel plug adapter converting 2.1 x 5.5mm to 1.7 x 4.0mm for RC and electronic devices.
PHC Enterprise DC barrel plug adapter converting 2.1 x 5.5mm to 1.7 x 4.0mm for RC and electronic devices
PHC Enterprise DC barrel plug adapter converting 2.1x5.5mm to 1.7x4.0mm right-angle plug for electronic devices.
PHC Enterprise DC barrel plug adapter converting 2.1 x 5.5mm to 1.7 x 4.0mm for RC and electronic devices.

DC Barrel Plug Adapter, 2.1mm x 5.5mm Female to 1.7mm x 4.0mm Male Right-Angle, 18 AWG | RC-X1740C1

by PHC Enterprise
$5.00 - $5.00
$5.00
$5.00 - $5.00
$5.00

DC Barrel Plug Adapter, 2.1 x 5.5mm to 1.7 x 4.0mm Right-Angle | Part RC-X1740C1

The RC-X1740C1 is a DC barrel plug adapter that converts a 2.1mm x 5.5mm female socket to a 1.7mm x 4.0mm right-angle male plug β€” no soldering required. The right-angle output plug is ideal for tight spaces and flush-mounted installations where a straight plug would create strain or clearance issues. Built with 18 AWG wire and a compact 3-inch pigtail length.

Technical Specifications

  • Part Number: RC-X1740C1
  • Connector (Input): Female 2.1mm (ID) x 5.5mm (OD) barrel jack
  • Connector (Output): Male 1.7mm (ID) x 4.0mm (OD) right-angle barrel plug
  • Wire Gauge: 18 AWG
  • Cable Length: 3 inches
  • Polarity: Center positive (+) β€” matches standard DC barrel convention

Common Use Cases

  • Adapting a 2.1 x 5.5mm power supply to devices requiring a 1.7 x 4.0mm plug
  • Tight-space installations where a right-angle plug reduces cable strain and clearance issues
  • Powering routers, modems, and networking equipment with non-standard barrel sizes
  • CCTV and security camera installations with mixed connector types
  • DIY electronics and bench power supply setups with varying plug requirements

Frequently Asked Questions

Q: What connectors does this adapter use?
A: The input (female socket) is 2.1mm x 5.5mm β€” the most common DC barrel size. The output (male plug) is 1.7mm x 4.0mm, a connector used on many routers, cameras, and compact electronics.

Q: Why is the output plug right-angle?
A: The right-angle design allows the cable to exit parallel to the device surface, reducing strain on the connector and making it easier to route cables in confined spaces or wall-mounted setups.

Q: Do I need to solder anything?
A: No. This is a plug-and-play pigtail adapter. Simply connect the female end to your power supply and the male end to your device.

Q: Is the polarity center positive?
A: Yes. This adapter follows the standard center-positive convention. Verify your device's polarity before use.

Let customers speak for us

from 325 reviews
Variable Transformer 10A (1000W) | 0–130VAC Output with Isolation & LCD Voltmeter - SC-10T-2
What an INCREDIBLE deal, what service!!! I'm be buying more!

I bought the Variac/isolation transformer combo. FOR STARTERS: NOBODY ELSE MAKES THIS COMBO with a genuine isolation transformer. And that fact that it's $200 out the door is insanity. My only advice with the unit would be to double check the voltage display against a multimeter; I find my display to be about 5V lower than the actual output and adjusted accordingly.

This item was packaged more securely than a nuclear warhead. Seriously, the packing job is a masterclass in transportation and logistical safeguards.

In short--I rarely leave reviews. I felt I HAD to for this product. If you're not sure because it's a newer item/company, don't worry. They are LEGIT and they are INCREDIBLE.
One more side note--customer service response is insanely fast also. I emailed a question on a SUNDAY EVENING and got an answer.

GREAT, domestically-owned small business I will support again.

Dan-Owner, HiFi Hopes LLC

Dan-Owner, Hifi Hopes Vintage Audio Restoration
AC-AC Power Supply 16V AC @ 1250mA; 2.1 x 5.5mm
Great service and communication

Got my power supply on time and it’s a great deal!

Roma Solomatov
AC-DC Linear Power Supply 12V DC @ 500mA 2.1 x 5.5mm (+) center polarity
Replacement for Morpheus Droptune Pedal

Needed a replacement for a few guitar pedals. This is a perfect replacement for many pedals. Just verify center polarity and amp requirements.

Brandon Pockat
Professional 500VA Isolation Transformer | 117VAC to 117VAC - ISO-500
Works. Looks good too.

More compact with the toroid transformer.

James Bradshaw
Professional 1000VA Isolation Transformer | 117VAC to 117VAC - ISO-1000
Professional 1000VA Isolation Transformer | 117VAC to 117VAC - ISO-1000

Work as described.

Henry Huynh
AC adapter to my harmonizing pedal

I plugged my new AC adapter to my harmonizing pedal and it worked perfectly. You got one happy customer! Thank you very much.

Sam Striegel
Professional 500VA Isolation Transformer | 117VAC to 117VAC - ISO-500
Excellent Packing

Unit works exactly as it should. This unit is heavy, it was double boxed along with bubble wrap and fitted inserts. Outstanding!

Brad Gensmer
DC Barrel Plug Adapter, Female 2.1mm x 5.5mm to Male 0.7mm x 2.5mm, 18 AWG | RC-X0725
DC Barrel Plug Adapter to 0.7 x 2.5mm plug from 2.1 x 5.5mm

A fantastic well made product. I am using this plug to power a early 2000 QRP transceiver and it works perfectly

Douglas Rehder
12V 500mA Linear Power Supply 3.5mm Plug | PV-1250C
Great Service

They had a transformer that matched my needs.
Great price and fast response.

Mike Nichols
6ft 2.5mm x 5.5mm DC Power Extension Cable, 20 AWG

We are totally satisfied with this product and the delivery time.

J.M.P.
6V AC-DC Linear Power Supply, 1400mA (1.4A), Negative Center | PV-61A
6V AC-DC Linear Power Supply

Works like a charm for my Grundig 350DL as I lost the original years ago. Thank you AC-DC PowerShack.

RALPH HALL
DC Barrel Plug Adapter to 2.5 x 5.5mm RIGHT ANGLE plug from 2.1 x 5.5mm

Great product

Rod Espinoza
Universal AC-DC Power Adapter (3V-12V, 600mA) - PHC-600K | Multi-Plug Regulated Switching Supply (7 Tips)
Works with my CASIO SK-1 KeyBoard

600mA 7.5VDC Tip (-)

Mark Klein
24VCT 24V, 12V Transformer 0-12V-24 CT @ 2A 117VAC to 24VAC or 12VAC
Fixed the Control box

Old transformer went bad after 30 years in service. Part was able to be worked into a tight space and box is working again. Thanks!!

Mikkel Halverson
6ft UL-Certified 18AWG DC Extension Cable (2.1mm x 5.5mm) - Heavy Duty, Black | HDCX6T
Just what I needed

As advertised, 18 gauge extension cables. Arrived promptly.

Ronald Simmer