The **FH23 Series** refers to a specific family of **FPC/FFC (Flexible Printed Circuit / Flexible Flat Cable)** connectors manufactured primarily by **Hirose Electric Co., Ltd.** These connectors are widely used in compact electronic devices such as smartphones, laptops, medical equipment, and cameras to connect the main circuit board to peripherals like LCD screens, keyboards, or touchpads. --- ### 1. Key Technical Specifications The FH23 series is characterized by its "Super Low Profile" and high-density design. | Feature | Specification | | :--- | :--- | | **Pitch** | 0.3 mm | | **Height** | 1.25 mm | | **Mounting Type** | SMT (Surface Mount Technology) | | **Contact Positions** | Ranges from 11 to 71 pins | | **Actuator Type** | Flip-lock (One-touch ZIF) | | **Current Rating** | 0.3 A | | **Voltage Rating** | 30V AC/DC | --- ### 2. Physical Design and Components The FH23 connector consists of four primary electronic/mechanical parts: 1. **Insulator Body:** Usually made of LCP (Liquid Crystal Polymer), a heat-resistant plastic that can withstand the high temperatures of lead-free reflow soldering. 2. **Contacts:** Phosphor bronze with gold plating. Gold is used to prevent oxidation and ensure stable electrical conductivity over time. 3. **Flip-Lock Actuator:** A rotating lever that secures the FPC cable. This "ZIF" (Zero Insertion Force) mechanism ensures that the cable can be inserted without friction, reducing wear on the delicate gold fingers of the FPC. 4. **Solder Tabs:** Metal reinforcements on the sides of the connector that provide mechanical stability when soldered to the PCB, preventing the connector from being ripped off during cable insertion. --- ### 3. Structural Advantages The FH23 series is popular in the electronics industry for several reasons: * **Space Efficiency:** With a 0.3mm pitch and 1.25mm height, it occupies minimal "real estate" on a PCB. * **Easy Assembly:** The flip-lock mechanism provides a clear tactile click, confirming that the cable is securely locked. * **Bottom Contacts:** The electrical contacts are located on the bottom of the connector housing, interfacing with the underside of the inserted FPC. * **Pick-and-Place Compatibility:** The top surface is flat, allowing automated vacuum nozzles to pick up the part during assembly. --- ### 4. Comparison: FH23 vs. Standard Connectors Compared to standard 0.5mm pitch connectors, the FH23 provides a significant reduction in footprint. | Feature | Standard FPC | FH23 Series | | :--- | :--- | :--- | | **Pin Density** | Moderate | Very High | | **Weight** | ~0.5g | ~0.1g - 0.2g | | **Typical Usage** | Industrial/Automotive | Ultra-thin Consumer Electronics |