## Overview of MMCX-R-PC The **MMCX-R-PC** is a specific type of micro-miniature coaxial connector designed for high-frequency RF (Radio Frequency) applications. The nomenclature typically breaks down as follows: * **MMCX**: Micro-Miniature Coaxial (The interface standard). * **R**: Right Angle (The physical orientation). * **PC**: Printed Circuit (Designed for PCB mounting). --- ### Technical Specifications Below are the typical electronic and mechanical characteristics of an MMCX-R-PC connector: | Feature | Specification | | :--- | :--- | | **Impedance** | 50 Ohms | | **Frequency Range** | DC to 6 GHz | | **Voltage Rating** | 170 Vrms (at sea level) | | **Insulation Resistance** | 1,000 MΩ Minimum | | **Contact Resistance** | Inner: 5.0 mΩ / Outer: 2.5 mΩ | | **Mating Cycle** | 500 Matings Minimum | | **Engagement Force** | < 3.4 lbs (15 N) | --- ### Key Components & Materials The construction of the MMCX-R-PC is critical for maintaining signal integrity in compact devices: 1. **Body (Shell):** Usually made of **Brass** with Gold plating to ensure excellent conductivity and corrosion resistance. 2. **Center Contact:** A pin made of **Beryllium Copper** or Brass, heavily gold-plated to minimize signal loss at the contact point. 3. **Insulator:** Typically made of **PTFE (Teflon)**, which provides a low dielectric constant for high-frequency performance. 4. **Snap-on Mechanism:** Unlike threaded SMA connectors, MMCX uses a snap-on coupling allowing for 360-degree rotation after mating, which reduces mechanical stress on the PCB. --- ### Mounting Configuration The "PC" designation indicates that the leads are designed for **Through-Hole** or **Surface Mount** soldering directly onto a circuit board. * **Signal Lead:** The center pin that carries the RF signal. * **Ground Legs:** Usually four structural posts that provide both a ground connection and mechanical stability to the board. --- ### Common Applications Due to its tiny footprint and high-frequency capabilities, the MMCX-R-PC is found in: * **Wireless Communication:** Wi-Fi routers and cellular base stations. * **Consumer Electronics:** GPS receivers and high-end In-Ear Monitors (IEMs). * **Testing Equipment:** Compact RF modules and PCMCIA cards. * **IoT Devices:** Where space is at a premium but high-speed data is required.