The **FJR-1A-R** is an electronic component typically associated with the **Relay** category. Specifically, it is a sub-miniature, high-performance signal relay often used in telecommunications, security systems, and medical equipment. Below is a detailed breakdown of its electronic characteristics and specifications. --- ### 1. General Specifications The FJR series is known for its compact size and low power consumption. | Feature | Specification (Typical) | | :--- | :--- | | **Relay Type** | Electromechanical / Signal Relay | | **Contact Form** | 1 Form A (SPST-NO: Single Pole Single Throw, Normally Open) | | **Contact Material** | Gold-plated Silver Alloy (Ag + Au) | | **Max Switching Voltage** | 125VAC / 60VDC | | **Max Switching Current** | 1A to 2A (depending on model variant) | | **Coil Power** | ~150mW to 200mW (Sensitive type) | --- ### 2. Internal Construction The part consists of four primary internal electronic sections: * **The Coil:** An electromagnetic copper winding that creates a magnetic field when energized. The "R" in the suffix often denotes a specific resistance or sensitivity rating. * **The Armature:** A moving metal piece that responds to the magnetic field. * **The Contacts:** Where the electrical switching happens. Being "1A" (Normally Open), the circuit is disconnected until the coil is powered. * **Terminal Pins:** Designed for PCB (Printed Circuit Board) mounting. --- ### 3. Key Electronic Characteristics #### A. Dielectric Strength This measures the insulation capability. For this class of relay, it usually offers: * Between open contacts: **500V AC** (1 minute). * Between coil and contacts: **1000V AC** (1 minute). #### B. Sensitivity The FJR-1A-R is designed to be driven by low-power circuits, such as those controlled by a transistor or a micro-controller (via a driver IC like the ULN2003). #### C. Lifecycle (Durability) * **Mechanical Life:** Up to 10,000,000 operations. * **Electrical Life:** Up to 100,000 operations at rated load. --- ### 4. Typical Application Circuit When integrating this part into a circuit, a **flyback diode** (e.g., 1N4148) must be used in parallel with the coil to protect sensitive electronics from voltage spikes during de-energization. ```cpp // Logic Diagram [Control Signal] --> [Transistor/Driver] --> [FJR-1A-R Coil] | [High Load Circuit] ``` ---