DIP DC Jack 5.5 2.1 — DC-044B Through-Hole DC Power Connector for PCB, Adapters & Industrial Power Supply

The DC-044B DIP DC jack is a vertical through‑hole DC power connector designed for PCB‑mounted power input applications. Featuring the industry‑standard 5.5mm outer and 2.1mm inner barrel diameter, this DIP DC jack 5.5 2.1 accepts all standard 5.5×2.1mm DC plugs commonly found on wall adapters, battery chargers, and bench power supplies. With its 3‑pin DIP configuration, it provides positive center pin, outer shell ground, and a normally‑closed insertion‑detection switch that breaks when a plug is inserted — enabling battery disconnect or auxiliary power switching circuits without additional components.

The vertical orientation keeps the DC inlet perpendicular to the PCB, ideal for rear‑panel or side‑panel power entry in enclosures where the board sits flat. The through‑hole mounting guarantees excellent mechanical retention against repeated plug insertions and cable tugging. A nickel‑plated brass body and center pin resist corrosion, while the high‑temperature PBT housing withstands wave‑solder operations up to 260°C. With a rated current of 2A and 5,000 mating cycles, this through-hole DC power jack 5.5 2.1 is a reliable choice for consumer electronics, IoT gateways, industrial control modules, and test instruments.

Recommended PCB Footprint

The DC-044B uses a 3‑pin triangular 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. Keep a clearance of at least 3mm around the jack body to allow for mating plug insertion. The connector body should sit flush against the PCB before soldering.

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. Use a no‑clean flux. Ensure the plastic housing is not submerged in 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. Apply solder to the junction of the terminal and pad for 3 seconds maximum per joint. Start with the center pin, then solder the outer terminals. Inspect for solder bridges between the closely spaced outer pins.

While surface‑mount technology dominates modern PCB assembly, power connectors like the DIP DC jack 5.5 2.1 are one of the few component categories where through‑hole remains the engineering preference. The reason is mechanical robustness. A DC power jack experiences repeated insertion and extraction forces — sometimes with significant lateral leverage as a user unplugs an adapter at an angle. SMT solder joints, anchored only to the top layer of a PCB, can crack or lift over time. Through‑hole pins, in contrast, pass through the entire board thickness and are soldered on both sides, forming a dual‑anchored joint that withstands much higher pull‑out and side‑load forces.

Additionally, the DC-044B’s DIP design simplifies assembly for low‑ to medium‑volume production, allowing hand soldering without the need for reflow ovens or precise stencils. The vertical orientation also routes the power entry perpendicular to the board, making it easy to place on the enclosure perimeter. For products that will see thousands of power cycles over their lifetime, a through‑hole DC jack is a proven, reliable choice.

The DC-044B has been tested to guarantee performance over 5,000 mating cycles and under various environmental stresses. Test highlights 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.
• Vibration test: 10–500 Hz, 1.5mm amplitude, 2 hours per axis per IEC 60068‑2‑6. No momentary contact opening.
• Thermal shock: 50 cycles between −30°C and +85°C. No cracking of the PBT housing and no increase in insertion force.
• Salt spray: 24 hours 5% NaCl fog per IEC 60068‑2‑11. Nickel plating prevented red rust, and the switch function remained intact.

For complete test reports, contact engineering@vistarelectronics.com.

All DC-044B DIP DC jack units are packaged in anti‑static PVC tubes (100 pieces per tube) or bulk trays. The jack is fully lead‑free and compatible with SAC305 solder. Custom options include higher current ratings (up to 5A with wider center pin), gold plating, and sealing boots. Standard MOQ is 1,000 pieces. For a free sample or volume pricing, email sales@vistarelectronics.com with your company details and project application.