DC Polarity Reversing Cable, 2.1 x 5.5mm, 18 AWG, 3 ft | RC-RN2155
DC Polarity Reversing Cable, 2.1 x 5.5mm Barrel Connectors
Part RC-RN2155
The RC-RN2155 is a 3-foot inline DC barrel cable built to intentionally reverse polarity between compatible 2.1 x 5.5mm connections. It provides a practical way to correct a polarity mismatch without cutting or rewiring a power lead.
Important: This cable reverses the DC polarity. It does not pass polarity straight through.
Technical Specifications
- Part Number: RC-RN2155
- Input Connector: 2.1mm (ID) x 5.5mm (OD) female barrel socket
- Output Connector: 2.1mm (ID) x 5.5mm (OD) male barrel plug
- Wire Gauge: 18 AWG
- Cable Length: 3 feet
- Polarity: Reverses positive and negative conductors
Common Use Cases
- Correcting a polarity mismatch between a DC power source and a compatible device
- Low-voltage DC installations that require a 2.1 x 5.5mm inline polarity-reversal lead
- Bench testing and service setups where connector size and output polarity have been verified
Compatibility Check Before Ordering
This cable is only for compatible DC connections. Confirm the device and power supply use a 2.1mm x 5.5mm barrel connector, require the same DC voltage, and can use the available current. Most importantly, verify that reversing polarity is required. Do not use this cable with AC output, a different connector size, or equipment that requires the original polarity.
Does RC-RN2155 reverse polarity?
Yes. It intentionally reverses the positive and negative conductors from the female input to the male output.
Will this change voltage?
No. It changes conductor polarity only. It does not convert AC to DC, change voltage, or regulate current.
Are 2.1mm and 2.5mm barrel plugs interchangeable?
No. Although both commonly use a 5.5mm outer diameter, their inner diameters differ. Confirm your equipment needs a 2.1mm x 5.5mm connector.
