The **DF1B-R28F** is a specialized electronic component primarily used in high-density wire-to-board interconnect systems. It belongs to the **DF1B Series** manufactured by **Hirose Electric (HRS)**. Below is a detailed technical breakdown of the part. --- ### 1. General Overview The DF1B-R28F is a **crimp contact (socket/terminal)** designed to be inserted into a plastic connector housing. It acts as the conductive interface between a discrete wire and the male header pins on a PCB. ### 2. Technical Specifications | Feature | Specification | | :--- | :--- | | **Manufacturer** | Hirose Electric (HRS) | | **Series** | DF1B | | **Gender** | Female (Socket) | | **Wire Gauge (AWG)** | 28 AWG (Optimized for thin wires) | | **Material** | Phosphor Bronze | | **Plating** | Tin Plating | | **Voltage Rating** | 250V AC/DC | | **Current Rating** | Up to 3A (Depends on wire gauge/number of pins) | | **Pitch Compatibility** | 2.5mm | --- ### 3. Key Characteristics #### A. Wire Termination The "R" in the part number indicates it is provided in **Reel form**, intended for high-speed automated crimping machines. If the part number were "DF1B-28F", it would likely refer to loose pieces for manual hand-tooling. #### B. Material Properties * **Phosphor Bronze:** Provides excellent fatigue resistance and conductivity, ensuring the terminal maintains its "grip" on the male pin over many mating cycles. * **Tin Plating:** Offers a cost-effective solution for preventing oxidation while maintaining good solderability and electrical contact. #### C. Safety & Design * **Locking Mechanism:** The terminal is designed with a small "lance" or locking tab that clicks into the DF1B series housing, preventing the wire from being pulled out (Terminal Retainer). --- ### 4. Common Applications The DF1B series is widely used in industrial and consumer electronics where a secure 2.5mm pitch connection is required: * **Internal Power Supply:** Connecting power modules to main logic boards. * **Industrial Automation:** Control signals for sensors and actuators. * **Home Appliances:** Control panels for white goods (washing machines, refrigerators). * **Office Equipment:** Internal wiring for printers and copiers. --- ### 5. Required Tooling To use this part effectively, specific tools are required: * **Applicator:** For automated crimping from the reel. * **Extraction Tool:** To safely remove the terminal from the housing without damaging the plastic.