The **AA2214ZGSK** is a high-performance Surface Mount (SMD) Light Emitting Diode (LED) manufactured by **Kingbright**. It belongs to the "Subminiature" series and is widely used in compact electronic devices. --- ## 1. Core Specifications Below are the primary electrical and optical characteristics of the AA2214ZGSK: | Parameter | Specification | | :--- | :--- | | **Emitting Color** | Green | | **Material** | InGaN (Indium Gallium Nitride) | | **Lens Type** | Water Clear | | **Luminous Intensity** | 700 - 1300 mcd @ 20mA | | **Dominant Wavelength** | 525 nm | | **Forward Voltage ($V_F$)** | 3.3V (Typ), 4.1V (Max) | | **Viewing Angle** | 120 Degrees | --- ## 2. Physical Dimensions & Packaging The "2214" in the part number refers to the physical footprint of the component. * **Footprint:** 2.2mm x 1.4mm. * **Height:** 1.3mm. * **Package Style:** PLCC-2 (Plastic Leaded Chip Carrier). * **Mounting:** Compatible with automated SMT (Surface Mount Technology) placement and infrared reflow soldering. --- ## 3. Key Electronic Features * **Efficiency:** Uses InGaN technology, which provides high brightness with relatively low power consumption. * **ESD Sensitivity:** Like most InGaN-based LEDs, it is sensitive to Static Electricity. It is rated for **Electrostatic Discharge (ESD)** protection, typically requiring careful handling (HBM Class 1C or higher depending on the specific revision). * **Moisture Sensitivity Level (MSL):** Usually rated at **Level 3**, meaning it must be mounted within 168 hours of opening the vacuum-sealed bag to prevent damage during soldering. --- ## 4. Typical Applications Because of its small size and high intensity, it is commonly found in: 1. **Backlighting:** LCD displays, switches, and symbols. 2. **Indicators:** Status lights on consumer electronics (routers, laptops). 3. **Medical Equipment:** Portable diagnostic tools. 4. **Automotive:** Dashboard illumination and interior lighting. --- ## 5. Circuit Connection Example To use this LED in a 5V circuit, a current-limiting resistor is required. ```python # Calculation for 5V Supply V_supply = 5.0 V_forward = 3.3 I_target = 0.020 # 20mA # Formula: R = (V_supply - V_forward) / I_target Resistance = (5.0 - 3.3) / 0.020 # Result: 85 Ohms (Use standard 91 or 100 Ohm resistor) ```