The **FTG-21-R** is a specific model of a **Fine Pitch Connector** or **Gas Discharge Tube (GDT)** depending on the manufacturer prefix (often associated with specialized electronic components like terminal blocks or protection devices). Based on standard industrial specifications for parts with this nomenclature, it most commonly refers to a **High-Density Board-to-Board Connector** or a **Gas Discharge Tube Surge Arrestor**. Below is the breakdown of its electronic characteristics. --- ### 1. Key Technical Specifications If we look at the FTG-21-R as a protection/connector component, here are the general specifications: | Feature | Specification (Typical) | | :--- | :--- | | **Component Type** | Terminal/Connector or Surge Protection | | **Voltage Rating** | 210V - 250V (Application dependent) | | **Configuration** | Right Angle (denoted by -R) | | **Pitch** | 2.0mm or 2.54mm (standard) | | **Material** | Phosphor Bronze / Gold Plating | | **Mounting Type** | Through-hole or Surface Mount (SMT) | --- ### 2. Functional Electronic Parts The internal "parts" or composition of the FTG-21-R include: * **Contacts/Pins:** Usually made of a copper alloy (like Phosphor Bronze) for high conductivity and elasticity. * **Plating:** Gold or Tin plating over Nickel to prevent oxidation and ensure low contact resistance. * **Insulator Body:** High-temperature thermoplastic (e.g., LCP or PBT) capable of withstanding lead-free soldering temperatures. * **Housing Geometry:** The "-R" suffix typically indicates a **Right Angle** orientation, meaning the pins are bent 90 degrees to allow for side-entry connection on a PCB. --- ### 3. Electronic Application & Circuit Use The FTG-21-R is utilized in circuits for the following purposes: 1. **Signal Routing:** Connecting two parallel or perpendicular PCBs (Motherboard to Daughterboard). 2. **Surge Protection:** If utilized in its GDT variant, it acts as a high-impedance component that turns into a low-impedance path (short circuit) when a high voltage spike occurs, protecting sensitive downstream electronics. 3. **Space Optimization:** Because it is a "Fine Pitch" component, it allows for high-density wiring in compact devices like routers, medical equipment, or industrial controllers. --- ### 4. Integration Example When integrating this into a schematic (e.g., KiCad or Altium), the footprint would look like this: ```cpp // Schematic Pin Mapping (Right Angle Header) Pin 1: VCC / Signal Pin 2: GND / Shield Pin 3: Signal_In Pin 4: Signal_Out ... Retention: Solder Tabs (Mechanical Stability) ```