The **JR16-R-4MFP115** is a high-reliability, waterproof circular connector from the **Hirose Electric (HRS)** JR series. These connectors are designed to meet Japanese Industrial Standards (JIS C 5432) and are widely used in industrial equipment, medical devices, and communication systems. ### 1. Part Number Breakdown Understanding the nomenclature helps identify the specific characteristics of the component: | Code Segment | Meaning | Specification | | :--- | :--- | :--- | | **JR** | Series Name | JR Series (Standard Circular) | | **16** | Shell Size | Outer diameter of the mating section | | **R** | Connector Type | **R** stands for **Receptacle** (Fixed mount) | | **4** | Number of Pins | This specific model has **4 contacts** | | **M** | Contact Gender | **M** stands for **Male** (Pins) | | **F** | Thread Type | **F** indicates Fine Pitch thread for locking | | **P115** | Modification | Manufacturer specific code for plating or configuration | --- ### 2. Technical Specifications This connector is built for rugged environments where a secure, dust-tight, or water-resistant connection is required. * **Current Rating:** Typically up to 10A per contact (depending on wire gauge). * **Voltage Rating:** AC 300V / DC 420V. * **Insulation Resistance:** 1,000 MΩ minimum at 500V DC. * **Contact Resistance:** 5 mΩ maximum at 1A DC. * **Mating Mechanism:** Threaded coupling (Screw-on lock). * **IP Rating:** Generally IP67/IP68 when mated (waterproof). --- ### 3. Key Components and Materials The "electronic" nature of this part relies on its material composition to ensure signal integrity: 1. **Outer Shell:** Usually made of a Zinc alloy or Aluminum alloy with nickel plating for corrosion resistance and EMI shielding. 2. **Insulator:** High-grade synthetic resin (e.g., PBT or PPS) providing high dielectric strength. 3. **Contacts:** Copper alloy with silver or gold plating to ensure high conductivity and prevent oxidation over long-term use. --- ### 4. Applications Due to its robust construction, the JR16-R-4MFP115 is commonly found in: * **Factory Automation:** Connecting sensors and actuators to control boxes. * **Test Equipment:** Stable connections for measuring instruments. * **Power Supplies:** Used as an input/output interface for rugged power bricks. * **Marine/Outdoor:** Environments where moisture and dust ingress protection is mandatory.