The **M3A21TCA-R** is a specific part number typically associated with **USB Type-C receptacles** (connectors) manufactured by companies like **Yueqing Hezhong** or similar electronics component suppliers. These are "Mid-Mount" connectors designed for integration into Slim PCBs. Below is a detailed breakdown of its electronic and mechanical specifications. --- ### 1. General Specifications This part is a high-performance connector designed for charging and data transfer. | Feature | Specification | | :--- | :--- | | **Connector Type** | USB Type-C (Receptacle) | | **Mounting Type** | Mid-Mount (Sinks into the PCB) | | **Pin Count** | 24 Pins (Full Feature) | | **Orientation** | Horizontal / Right Angle | | **Shell Material** | Stainless Steel | --- ### 2. Electrical Characteristics The electrical ratings define the power delivery and signal integrity capabilities of the component. | Parameter | Rating | | :--- | :--- | | **Current Rating** | 5.0A (for VBUS), 1.25A (for other pins) | | **Voltage Rating** | 20V DC | | **Contact Resistance** | 40mΩ Max | | **Insulation Resistance** | 100MΩ Min | | **Dielectric Strength** | 100V AC for 1 minute | --- ### 3. Mechanical & Material Parts The durability and construction of the M3A21TCA-R ensure it can withstand repetitive use. * **Housing:** High-Temperature Thermoplastic (LCP), UL94V-0 rated (Black). * **Contacts:** Copper Alloy with Gold plating on the contact area and Tin plating on the solder tails. * **Shell:** Stainless Steel with Nickel plating for corrosion resistance. * **Mating Cycles:** Rated for up to 10,000 insertions/withdrawals. --- ### 4. Pinout Configuration As a 24-pin Type-C connector, it supports the standard USB-C pin map: | Group | Pins | Function | | :--- | :--- | :--- | | **Power** | VBUS, GND | Power delivery and ground return. | | **High Speed** | TX+/-, RX+/- | USB 3.1/3.2 SuperSpeed data lanes. | | **Legacy Data** | D+/D- | USB 2.0 backward compatibility. | | **Configuration** | CC1, CC2 | Cable orientation and Power Delivery (PD) negotiation. | | **Sideband** | SBU1, SBU2 | Used for Alternate Modes (e.g., DisplayPort). | --- ### 5. Application Areas The "Mid-Mount" design is specifically chosen for devices where thickness is a primary concern: * **Smartphones:** To achieve a thinner profile. * **Tablets/Laptops:** For side-mounted charging ports. * **Wearables:** Compact charging interfaces. * **Power Banks:** High-current input/output ports.