DC Power Jack 5.5×2.1mm — DC-012 Through-Hole Panel-Mount DC Power Connector for Adapters, Industrial & Consumer Electronics

The DC-012 DC power jack is a vertical through‑hole DC power connector built for panel‑mount applications where the power inlet must screw securely into an enclosure wall. Accepting the industry‑standard 5.5mm outer and 2.1mm inner barrel plug, this DC power jack 5.5×2.1mm is instantly compatible with thousands of off‑the‑shelf wall adapters, battery chargers, and bench power supplies. The integrated metal nut and threaded bushing provide a firm mechanical lock to the chassis, preventing loosening under repeated cable insertion and extraction.

The 3‑pin DIP footprint carries the center pin (positive), outer shell (ground), and a normally‑closed switch terminal that opens when a plug is inserted — a simple, built‑in solution for automatic battery disconnect or external‑power detection. The nickel‑plated brass contacts and center pin offer excellent corrosion resistance and low contact resistance over the connector’s 5,000‑cycle lifetime. The high‑temperature PBT housing withstands wave‑solder temperatures, making the DC-012 easy to integrate into both low‑volume hand‑assembled prototypes and high‑volume production lines. Whether you are powering an IoT gateway, a guitar pedal, or a test instrument, this robust DC jack delivers reliable, long‑lasting power entry.

Recommended PCB Footprint

The DC-012 uses a 3‑pin triangular DIP footprint. The center pin (positive) is offset from the two outer pins. Maintain a hole diameter of 2.5mm for the center pin and 2.0mm for the outer shell and switch terminals. An annular ring of 0.3mm is recommended. Leave at least 5mm of clearance around the threaded bushing for the hex nut and washer. Ensure the panel cutout matches the bushing diameter (typically 8.0mm) for a secure fit.

Wave Soldering Profile

Pre‑heat the PCB to 100–120°C for 60 seconds. Solder pot temperature: 250–260°C, contact time: 3–5 seconds per terminal. The metal bushing will absorb heat quickly; keep the plastic housing above the solder wave. Allow gradual cooling at 4–6°C per second.

Manual Soldering (Rework)

Use a temperature‑controlled iron set to 350°C with a 2.4mm chisel tip. Solder each terminal for ≤3 seconds. Start with the center pin, then the outer shell and switch pins. Inspect for solder bridges between the closely spaced outer terminals. Install the panel nut and washer after soldering to avoid thermal interference.

While simple PCB‑mounted DC jacks save a few cents, a DC power jack 5.5×2.1mm with a threaded panel‑mount bushing offers a decisive mechanical advantage. Every time a user inserts or removes a DC plug, a significant force is applied to the connector. In a PCB‑only jack, this force is transmitted entirely through the solder joints to the board, which over time can cause pad lifting, cracked joints, or even broken traces. The DC-012’s metal bushing transfers this force directly to the enclosure wall via the locking nut, relieving the PCB of all mechanical stress. This is especially important in devices that will see hundreds of plug cycles in their lifetime, such as guitar pedals, portable test instruments, and industrial control panels. Additionally, the panel‑mount design provides a clean, professional appearance on the rear panel, with no visible plastic edges. For any product where the power inlet is user‑facing, a panel‑mount DC jack is the more robust and aesthetically pleasing choice.

The DC-012 has been tested to guarantee 5,000 mating cycles and withstand harsh operating environments. Key test results include:

• Mating durability: 5,000 insertion/extraction cycles with a standard 5.5×2.1mm plug at 200 cycles/hour. Contact resistance remained below 50 mΩ, and no visible wear on the nickel finish.
• Vibration test: 10–500 Hz, 1.5mm double amplitude, 2 hours per axis per IEC 60068‑2‑6. No momentary contact opening, and the panel nut remained tight.
• Thermal shock: 50 cycles between −30°C and +85°C per IEC 60068‑2‑14. No cracking of the PBT housing, and the bushing‑to‑body bond remained intact.
• Salt spray: 24 hours 5% NaCl fog per IEC 60068‑2‑11. Nickel plating showed no red rust, and the switch function was fully retained after rinsing.

For a complete test report or to discuss custom qualification, contact engineering@vistarelectronics.com.

All DC-012 DC power jack units are packed in antistatic tubes (100 pieces per tube), with the hex nut and washer included in each compartment. The jack is lead‑free and wave‑solderable with SAC305 solder. Custom options include a higher current rating (up to 5A with wider center pin), gold plating for harsh environments, and different thread lengths. Standard MOQ is 1,000 pieces. To request a free sample or volume pricing, email sales@vistarelectronics.com with your company details and project application.