The **31-5556-RFX** is a high-quality RF (Radio Frequency) connector manufactured by **Amphenol RF**. It is specifically an **SMA Straight Crimp Plug** designed for use with coaxial cables. Below is a detailed breakdown of its electronic and mechanical specifications. --- ### 1. General Specifications | Feature | Details | | :--- | :--- | | **Connector Type** | SMA (SubMiniature version A) | | **Gender** | Plug (Male) | | **Orientation** | Straight | | **Termination Style** | Crimp | | **Impedance** | 50 Ohms | | **Cable Type Compatibility** | RG-58, RG-141, LMR-195 | --- ### 2. Materials and Construction The "RFX" suffix in Amphenol part numbers typically indicates a commercial-grade series that provides a balance between high performance and cost-effectiveness. * **Body Material:** Brass * **Body Finish:** Gold Plating (provides excellent conductivity and corrosion resistance) * **Contact Material:** Brass or Beryllium Copper * **Contact Plating:** Gold * **Insulator:** PTFE (Teflon), known for low dielectric constant and high temperature stability. * **Coupling Nut:** Hexagonal (Standard SMA size). --- ### 3. Electrical & Mechanical Performance * **Frequency Range:** DC to 12.4 GHz (Standard for flexible cables). * **Voltage Rating:** 500 Volts Peak. * **Dielectric Withstanding Voltage:** 1000 Volts RMS. * **Durability:** Minimum 500 mating cycles. * **Temperature Range:** -65°C to +165°C. --- ### 4. Application Use Cases This specific connector is widely used in industries requiring reliable RF transmission in a small form factor: 1. **Telecommunications:** Base stations and antennas. 2. **Instrumentation:** Signal generators and measurement equipment. 3. **Wireless Technology:** WiFi routers, GPS systems, and RFID readers. 4. **Aviation:** Internal communication and radio systems. --- ### 5. Assembly Requirements To install the 31-5556-RFX, you generally require: 1. **A Coaxial Stripper:** To prep the RG-58 or LMR-195 cable. 2. **A Crimp Tool:** With the correct hex die size (usually **.213"** for the ferrule). 3. **Soldering Iron (Optional/Depending on Pin):** While many are crimp/crimp, some center contacts may allow for soldering for maximum signal integrity.