Header Connectors — Introduction & Applications

Header connectors (also called pin headers,male headers, female headers, orreceptacles) are among the most common and versatile    interconnect components in electronics. They provide electrical connections    between a PCB and another PCB, a wire harness, a cable assembly, or a mating    connector.

Key Features and Advantages

  • Modular and flexible: Single-row, dual-row, and triple-row configurations with 1 to 100+ pins.
  • Wide pitch range: 2.54 mm, 2.00 mm, 1.27 mm, 1.00 mm, and 0.80 mm.
  • Multiple mounting options: Through-hole, surface-mount, press-fit, and right-angle.
  • Polarization and keying: Shrouded and box headers prevent mis-mating.
  • Cost-effective and easy to assemble.
  • Reliable connection: Gold, tin, or selective plating options.

Common Types of Header Connectors

TypeDescriptionTypical Applications
Pin Header (Male)Single or dual row of pins, straight or right-anglePCB-to-PCB, wire-to-board, prototyping
Female Header / ReceptacleSingle or dual row of sockets, mates with pin headersBoard-to-board, daughtercard, Arduino shields
Box Header / Shrouded HeaderPin header enclosed in a plastic box with keyingIDC cable, ribbon cable, industrial control
IDC HeaderInsulation displacement connector for ribbon cableMass termination, computer peripherals, industrial
Ejector HeaderShrouded header with ejector latchesSecure cable connection, telecom, industrial
Spring-Loaded Header (Pogo)Spring-loaded pins for temporary connectionsTest fixtures, programming, charging
Board-to-Board HeaderMale/female pair for stacking PCBsMezzanine, module stacking, embedded systems

Major Application Areas

Prototyping & Development Boards

Arduino, Raspberry Pi, STM32, ESP32, and other development boards use header    connectors for sensors, actuators, displays, and shields. Essential for rapid    prototyping, education, and DIY electronics.

Consumer Electronics

Smartphones, tablets, laptops, wearables, smart home devices, gaming    consoles, and portable media players. Used for internal board-to-board    connections, battery connections, display interfaces, and sensor connections.

Industrial Control & Automation

PLC modules, I/O cards, motor drives, sensors, relays, and industrial    communication interfaces. Shrouded and box headers provide secure, polarized    connections for ribbon cables and wire harnesses.

Automotive Electronics

ECUs, body control modules, infotainment systems, ADAS sensors, battery    management systems, and lighting modules. Must withstand vibration,    temperature cycling, and humidity.

Medical Devices

Patient monitoring, diagnostic imaging, portable medical devices, and    implantable device programmers. High-reliability, low-contact-resistance    versions are available.

Communications & Networking

Routers, switches, base stations, optical modules, and telecom equipment.    Board-to-board connections, power interfaces, and signal routing.

Test & Measurement

Test fixtures, ATE, oscilloscopes, logic analyzers, and programmers. Spring-    loaded headers and standard pin headers enable reliable probing and signal    access.

Computing & Data Centers

Servers, motherboards, GPU cards, memory modules, and storage devices. Power    distribution, fan control, front-panel I/O, and board-to-board interconnects.

Selection Considerations

  • Pitch: 2.54 mm, 2.00 mm, 1.27 mm, 1.00 mm, 0.80 mm.
  • Number of Pins: 2 to 100+ pins, single/dual/triple row.
  • Mounting Type: Through-hole, surface-mount, press-fit, right-angle.
  • Gender: Male pin header or female receptacle.
  • Current Rating: Typically 1–3 A per pin; high-current up to 10 A+.
  • Voltage Rating: Usually 250–500 VAC.
  • Plating: Tin for cost-sensitive; gold for high reliability.
  • Polarization/Keying: Shrouded or box headers prevent mis-mating.
  • Locking Mechanism: Friction lock, ejector latch, or screw lock.
  • Operating Temperature: −40°C to +105°C standard; up to +150°C high-temp.
  • Environmental Rating: IP-rated versions for harsh environments.