The **KASD-61-R** is an electronic component manufactured by **Kingbright**. It is specifically an **AlGaInP (Aluminum Gallium Indium Phosphide) SMD (Surface Mount Device) LED Display**. These are commonly used in instrumentation, consumer electronics, and industrial panels to provide numeric or status readouts. --- ### 1. Key Technical Specifications The following table outlines the primary electrical and optical characteristics of the KASD-61-R: | Parameter | Specification | Details | | :--- | :--- | :--- | | **Part Number** | KASD-61-R | Super Bright Red | | **Material** | AlGaInP | High efficiency semiconductor | | **Forward Voltage ($V_f$)** | 1.95V (Typ) / 2.5V (Max) | Standard low power consumption | | **Forward Current ($I_f$)** | 20mA | Recommended operating current | | **Luminous Intensity** | 14,000 - 34,000 µcd | High visibility | | **Wavelength** | 645 nm (Peak) | Deep red output | | **Operating Temp** | -40°C to +85°C | Industrial grade range | --- ### 2. Functional Description The KASD-61-R is a **6mm (0.24 inch) single-digit numeric display**. * **SMD Package:** Unlike traditional through-hole displays, this part is designed for automated surface mount assembly, which saves space on the PCB. * **Common Anode/Cathode:** Typically, these series are categorized by their internal wiring. You must verify the specific pinout (Common Anode vs. Common Cathode) to ensure compatibility with your driver IC. * **Digit Layout:** It utilizes a standard 7-segment layout (plus a decimal point) to represent numbers 0-9 and some basic characters (A, b, C, d, E, F). --- ### 3. Application Circuit Example To use the KASD-61-R, you must include current-limiting resistors for each segment to prevent thermal runaway. ```python # Simple formula to calculate the Resistor (R) # R = (Supply Voltage - Forward Voltage) / Forward Current Supply_Voltage = 5.0 # Volts Vf = 1.95 # Volts (Typical for KASD-61-R) If = 0.02 # Amps (20mA) Resistor_Value = (5.0 - 1.95) / 0.02 print(f"Required Resistor: {Resistor_Value} Ohms") # Result: ~150 Ohms ``` --- ### 4. Component Benefits 1. **Low Profile:** The SMD design allows for thinner device enclosures. 2. **Moisture Sensitivity:** Typically rated at MSL 2a or 3, meaning it requires proper handling/storage to prevent damage during reflow soldering. 3. **RoHS Compliant:** Meets environmental standards for lead-free manufacturing.