The **KMMLS-313-R** is a specific electronic component, typically categorized as a **Micro-USB Connector** (specifically a Type B, Mid-mount, or SMT variant). These are commonly used in mobile devices, peripherals, and charging circuits. --- ### 1. Technical Specifications The following table outlines the typical electrical and mechanical characteristics for this series of connectors: | Feature | Specification | | :--- | :--- | | **Connector Type** | Micro-USB Type B | | **Mounting Type** | Surface Mount (SMT) / Mid-Mount | | **Number of Contacts** | 5 Pins (Standard USB 2.0) | | **Current Rating** | 1.0A - 1.8A per contact | | **Voltage Rating** | 30V AC/DC | | **Insulation Resistance** | 100M $\Omega$ Minimum | | **Contact Resistance** | 30m $\Omega$ Maximum | | **Durability** | 10,000 Mating Cycles | --- ### 2. Key Electronic Parts & Construction The component is composed of several critical materials designed for durability and conductivity: * **Housing:** Usually made of High-Temperature Thermoplastic (LCP or Nylon), designed to withstand reflow soldering temperatures. * **Contacts:** Copper alloy (Phosphor Bronze) with **Gold plating** on the contact area to prevent oxidation and ensure stable data/power transmission. * **Shell:** Stainless steel or Copper alloy with Nickel plating for EMI shielding and structural grounding. * **Solder Tabs:** Large metal "wings" or tabs that provide mechanical strength to prevent the connector from being ripped off the PCB during cable insertion. --- ### 3. Pinout Configuration As a standard 5-pin Micro-USB, the electronic footprint follows this logic: | Pin Number | Signal Name | Description | | :--- | :--- | :--- | | 1 | **VCC** | +5V Power Supply | | 2 | **D-** | Data Minus | | 3 | **D+** | Data Plus | | 4 | **ID** | Identification (OTG mode selection) | | 5 | **GND** | Ground | --- ### 4. Implementation Example When integrating this part into a circuit (e.g., using an EDA tool like Altium or KiCad), the footprint must account for the "Mid-mount" nature, where a cutout in the PCB is often required to lower the profile of the connector. ```cpp // Typical Schematic Labeling for KMMLS-313-R Connector_USB_Micro_B { Pin1: VBUS; Pin2: USB_D_N; Pin3: USB_D_P; Pin4: USB_ID; Pin5: GND; Shield: SHIELD_GND; } ```