The DC-005 SMD 3-Pin Female Barrel Power Socket (5.5mm x 2.1mm / 5.5mm x 2.5mm compatible) is a surface-mount DC power jack designed for low-profile PCB integration. Built with a heat-resistant thermoplastic housing, copper alloy contact terminals, and an integrated internal normally-closed shunt switch, the DC-005 SMD socket delivers stable power delivery up to 30V / 2A (or 3A depending on trace sizing). It is widely used for powering embedded microcontroller boards, IoT sensors, wireless routers, LED drivers, audio devices, and portable electronics from standard external DC wall adapters.

Specifications

• Model / Part Number: DC-005 SMD (Surface Mount Technology)
• Connector Type: DC Power Female Barrel Jack / Socket
• Outer Barrel Diameter: 5.5mm
• Center Pin Diameter: 2.1mm (Standard) / 2.5mm option
• Pin Configuration: 3-Pin SMD / SMT Gull-Wing & Side Solder Tabs
• Rated Voltage: Up to 30V DC
• Rated Current: 1.5A to 3.0A Max
• Contact Resistance: ≤ 0.03Ω (30mΩ)
• Insulation Resistance: ≥ 100MΩ (at 500V DC)
• Dielectric Withstanding Voltage: 500V AC (50Hz / 1 minute)
• Insertion / Extraction Force: 3N to 20N (0.3kgf to 2.0kgf)
• Operating Life Cycles: ≥ 5,000 mating cycles
• Housing Material: High-Temperature Resistant Thermoplastic (UL94 V-0, suitable for reflow soldering)
• Operating Temperature: -20°C to +70°C

Features

• Surface-Mount (SMD) Design: Optimized for automated SMT pick-and-place assembly lines and compact, single-sided PCB designs without requiring through-hole drilling.
• Integrated Shunt Switch (Pin 3): Automatically switches between external DC adapter power and internal battery/backup power when a barrel plug is inserted.
• Reflow Heat Tolerant: Molded from high-temperature polymer to withstand standard lead-free reflow and hot-air soldering profiles without melting or warping.
• Rugged Mechanical Retention: Features side solder tabs and stabilizing locators to resist torque, shear stress, and repeated cable plugging/unplugging.
• High-Conductivity Terminals: Gold/tin-plated copper alloy contact springs ensure low contact resistance and stable current delivery.

Common Applications

• Microcontroller & Development Boards: DC power input for Arduino, ESP32, Raspberry Pi accessories, and custom embedded platforms.
• Smart Home & IoT Hardware: Power input for wireless gateways, environmental sensors, relays, and security cameras.
• LED Lighting Drivers: Direct 12V/24V DC input for LED strips, controllers, and desk lamps.
• Audio & Media Players: Power jacks for Bluetooth receivers, DAC boards, headphone amplifiers, and mini speakers.
• Battery Powered Gadgets: Automatic AC-adapter-to-battery switching circuits in handheld and portable test equipment.

Usage Tips

• Pinout & Switching Function:
  • Pin 1 (Rear Tab): Center Pin (Typically Center-Positive $V_{IN}$ / $+12\text{V}$).
  • Pin 2 (Outer Spring): Outer Sleeve Contact (Typically Ground / $0\text{V}$).
  • Pin 3 (Switch Contact): Normally connected to Pin 2 when NO plug is inserted; disconnects from Pin 2 when a barrel plug is plugged in (used for battery disconnect circuits).
• PCB Pad Anchoring: Ensure generous copper pad sizing and solder fillets around the side ground/mechanical tabs to provide robust shear strength against cable tugging.
• Soldering Temperature: For hand soldering, use a clean tip at 330°C to 350°C and complete joint soldering within 3 seconds per pin to avoid thermal softening of the internal barrel sleeve.
• Polarity Verification: Always double-check adapter polarity (standard center-positive $\oplus-\!\text{C}\!-\ominus$) and place a reverse-polarity protection Schottky diode (e.g., SS34 or SS54) right after Pin 1 on the circuit board.

Datasheet