The part number **EMPCB.SMAFSTJ.C.HT** identifies a specific high-frequency RF connector component, typically used in telecommunications, aerospace, and medical electronics. Below is a breakdown of the technical characteristics based on the standard naming conventions for this type of electronic hardware. --- ### 1. Technical Specification Table | Feature | Description | | :--- | :--- | | **Connector Series** | SMA (Sub-Miniature version A) | | **Gender** | Female (Jack) | | **Orientation** | Straight / Vertical | | **Mounting Type** | PCB Surface Mount (SMT) or Edge Mount | | **Body Material** | Brass or Stainless Steel (typically Gold plated) | | **Impedance** | 50 Ohms (Standard for RF) | | **Temperature Rating** | High Temperature (HT) rated (often up to 165°C or higher) | --- ### 2. Breakdown of the Part Number The alphanumeric string can be deconstructed as follows: * **EMPCB**: Indicates an **Edge Mount PCB** design. This means the connector is designed to slide onto the edge of a printed circuit board rather than sitting flat on top of it. * **SMAF**: Identifies the interface as **SMA Female**. SMA connectors use a threaded interface and are known for their durability and high frequency range (up to 18 GHz). * **STJ**: Stands for **Straight Jack**. This confirms the connector does not have a 90-degree bend and is the receptacle side of the connection. * **C**: This usually refers to the **Contact** type or specific plating (e.g., Center contact gold plating). * **HT**: Stands for **High Temperature**. This indicates the dielectric material (usually PTFE or a variant) and the housing are designed to withstand extreme thermal environments or high-heat soldering processes (like reflow soldering). --- ### 3. Application and Usage These parts are critical in high-speed signal integrity environments. Common use cases include: 1. **RF Prototyping:** Used on evaluation boards for signal testing. 2. **Antenna Interconnects:** Providing a secure, threaded connection for external antennas. 3. **Microwave Modules:** Used in radar, satellite, and cellular base station equipment. 4. **High-Heat Environments:** The "HT" rating makes it suitable for industrial machinery or automotive engine compartments where standard connectors might melt or deform. --- ### 4. Typical Footprint Requirements (Example) ```cpp // General PCB Layout Considerations for SMA Edge Mounts: // 1. Trace Width: Must be calculated for 50 Ohm matched impedance. // 2. Board Thickness: Edge mounts are specific to PCB thickness (e.g., 1.6mm). // 3. Grounding: Large ground planes on top/bottom layers for EMI shielding. ``` ---