The **WJPAD2-761-R** is a specialized electronic component primarily categorized as an **EMI (Electromagnetic Interference) shielding and grounding part**. It is frequently utilized in high-density consumer electronics, such as smartphones, tablets, and laptops, to manage signal integrity and prevent electrostatic discharge (ESD). --- ### 1. Component Overview The "WJPAD" series generally refers to **SMD (Surface Mount Device) Grounding Gaskets** or **Conductive Pads**. These components act as a bridge between the PCB (Printed Circuit Board) and a metal chassis or another conductive surface. | Feature | Specification Details | | :--- | :--- | | **Category** | EMI Shielding / Grounding Contact | | **Mounting Type** | Surface Mount (SMD / SMT) | | **Material Composition** | Conductive fabric or silicone with a metal plating (Gold/Sn) | | **Primary Function** | Grounding connection and vibration dampening | | **RoHS Status** | Compliant (indicated by the "-R" suffix) | --- ### 2. Key Characteristics The design of the WJPAD2-761-R focuses on three main engineering goals: 1. **Low Contact Resistance:** The surface is typically plated with gold or another high-conductivity metal to ensure a low-impedance path to the ground. 2. **Elasticity/Recovery:** Unlike a rigid pin, these pads are compressible. They maintain a constant force against the mating surface even under thermal expansion or mechanical vibration. 3. **Reflow Solderable:** Designed to be picked and placed by automated machinery and soldered via standard reflow ovens. --- ### 3. Mechanical Specifications (General Proportions) While specific dimensions vary by manufacturer, the "761" often correlates to the footprint size. * **Height:** Usually ranges from 1.0mm to 3.0mm. * **Base Dimensions:** Small footprint (e.g., 2.5mm x 2.0mm) to save PCB real estate. * **Structure:** Often consists of a heat-resistant core (like silicone or polyimide) wrapped in a conductive metallic foil or mesh. --- ### 4. Common Applications * **Smartphones:** Grounding the LCD frame to the logic board. * **Laptops:** Connecting the motherboard to the magnesium or aluminum chassis. * **Antenna Modules:** Providing a stable ground plane for RF (Radio Frequency) signals. * **ESD Protection:** Diverting static electricity away from sensitive ICs to the device housing. ---