The **ALDY-13-R** is an electronic component manufactured by **Takamisawa (Fujitsu)**. It is a high-sensitivity, subminiature signal relay specifically designed for low-power switching applications, often found in telecommunications and test equipment. --- ### 1. Technical Specifications The following table summarizes the key electrical and physical characteristics of the ALDY-13-R: | Feature | Specification | | :--- | :--- | | **Contact Form** | 1 Form A (SPST-NO - Single Pole Single Throw, Normally Open) | | **Nominal Coil Voltage** | 3V DC | | **Contact Rating (Resistive)** | 3A 125VAC / 3A 30VDC | | **Max. Switching Power** | 375VA / 90W | | **Coil Power Consumption** | ~200 mW (High Sensitivity) | | **Mounting Type** | Through-Hole (PCB) | | **Contact Material** | Gold-overlay silver alloy | | **Terminal Shape** | PC Board Terminal | --- ### 2. Key Internal Components The ALDY-13-R consists of several critical electronic parts integrated into a small package: #### A. The Coil (Actuator) The coil is wound with fine copper wire. When a **3V DC** current passes through it, it generates an electromagnetic field. Because this is a "high sensitivity" model, the coil is designed to actuate with very low current, making it compatible with direct logic drive (e.g., from a microcontroller). #### B. The Contacts * **Stationary and Movable Contacts:** These are usually coated in gold-overlay silver. The gold layer prevents oxidation and ensures high reliability when switching "dry circuits" (very low current signals). * **Spring Mechanism:** Returns the contacts to the "Open" position once power is removed from the coil. #### C. The Casing The "R" suffix often denotes specific packaging or environmental sealing. The ALDY series generally features a plastic-sealed construction, allowing it to withstand automatic soldering and cleaning processes on a PCB assembly line. --- ### 3. Pinout Configuration While the physical layout is small, the standard pinout typically follows this logic: 1. **Coil Pins (2):** Connected to the control circuit (3V source). 2. **Switch Pins (2):** Connected to the load you wish to turn on/off. --- ### 4. Typical Applications * **Control Boards:** Interfacing between low-power microprocessors and higher-power peripherals. * **Audio/Video Equipment:** Switching signal paths without introducing significant noise. * **Industrial Automation:** Used in PLC outputs or sensor interfaces. * **Smart Home Devices:** Compact enough for light switches or smart outlets.