The **TCP1.25-R** is a specific electronic component, typically identified as a **Wire-to-Board Crimp Connector Terminal** or a **Polymer Positive Temperature Coefficient (PPTC) Resettable Fuse**, depending on the manufacturer (most commonly associated with connector series like the 1.25mm pitch systems). However, in the context of generic electronic specifications, "TCP" often refers to **Terminal Connector Pins** with a specific pitch. Below is the technical breakdown for a **1.25mm Pitch Connector Terminal**. --- ## 1. Technical Specifications These parts are designed for high-density electronic assemblies where space is limited. | Feature | Specification | | :--- | :--- | | **Pitch** | 1.25 mm (0.049") | | **Type** | Female Crimp Terminal | | **Material** | Phosphor Bronze or Brass | | **Plating** | Tin (Sn) or Gold (Au) flash | | **Current Rating** | 1.0A - 1.5A AC/DC | | **Voltage Rating** | 100V - 125V AC/DC | | **Wire Gauge (AWG)** | #28 to #32 AWG | --- ## 2. Key Components & Design The "R" suffix usually denotes **Reel** packaging (for automated crimping machines) rather than loose pieces. ### Physical Characteristics: * **Crimp Barrels:** Includes a wire barrel (for electrical contact) and an insulation barrel (for mechanical strain relief). * **Locking Tangs:** Small metal tabs that lock the terminal into the plastic housing to prevent "back-out." * **Contact Point:** Dimpled or cantilevered design to ensure consistent pressure against the male header pin. ### Compatible Housings: These terminals are inserted into plastic housings often labeled as **1.25mm Housing (e.g., Molex PicoBlade compatible or JST GH/series clones).** --- ## 3. Application Areas Because of the 1.25mm pitch, these parts are used in compact electronics: 1. **Consumer Electronics:** Drones, RC planes, and handheld gaming devices. 2. **Display Modules:** Connecting LCD/OLED screens to PCBs. 3. **LED Lighting:** Internal wiring for LED strips and controllers. 4. **Sensors:** Interfacing small I2C or UART sensor modules with microcontrollers. --- ## 4. Proper Usage (Crimping Guide) To ensure the electrical integrity of the TCP1.25-R, follow these steps: * **Stripping:** Strip approximately 1.5mm to 2.0mm of insulation. * **Tooling:** Use a precision crimping tool (e.g., PA-09 or professional ratcheting tools) suited for 1.25mm terminals. * **Inspection:** Ensure no stray wire strands are outside the barrel and the insulation is securely gripped by the rear tabs.