Through-hole pigtail

A through-hole pigtail is a wire assembly with a connector designed for insertion into PCB holes, providing secure mechanical and electrical connections.

Definition and Structure

A through-hole pigtail typically consists of a short length of wire (the "pigtail") terminated with a connector or terminal that is designed to be inserted into through-holes on a printed circuit board (PCB). The connector is soldered into the PCB, ensuring a strong mechanical bond and reliable electrical contact. This design contrasts with surface-mount connectors, which attach to the PCB surface without passing through holes .

Applications

Through-hole pigtails are widely used in applications requiring robust mechanical stability and high-reliability electrical connections, such as:

• Aerospace, defense, and military electronics
• Industrial and telecommunications equipment
• High-frequency RF systems where impedance control and low insertion loss are critical They are particularly useful in environments subject to vibration or mechanical stress because the through-hole mounting provides enhanced retention and durability compared to surface-mount alternatives .

Connector Types and Variants

Through-hole pigtails can be paired with various connector types, including:

• D-Sub connectors for signal and data transmission
• Rectangular headers and male pins for general PCB interconnects
• Automotive and Generation Y terminals for compact, low-mating-force applications These connectors may be sealed or unsealed, and can support hybrid designs for mixed signal or power applications.

Sourcing and Specifications

Through-hole pigtails and connectors are available from major electronics distributors such as DigiKey and Mouser, which provide datasheets, inventory, and pricing . When selecting a through-hole pigtail, consider:

• Wire gauge and insulation type
• Connector pitch and number of positions
• Electrical ratings (voltage, current, impedance)
• Environmental requirements (temperature, vibration, moisture)

Advantages

• Strong mechanical retention due to soldered through-hole mounting
• Reliable electrical performance for high-frequency or high-current applications
• Versatility in connecting wires to PCBs in complex assemblies Through-hole pigtails are a dependable solution for applications where long-term stability and robust connections are essential.