The **GHB-3M35-R2** is a high-performance, compact **Surface Mount (SMT) LED** manufactured by **American Bright Optoelectronics**. It is part of their High-Bright Blue LED series, commonly used in indicators, backlighting, and automotive applications. --- ## Technical Specifications The following table outlines the key electrical and optical characteristics of the GHB-3M35-R2: | Parameter | Specification | Unit | | :--- | :--- | :--- | | **Emitted Color** | Blue | - | | **Material** | InGaN (Indium Gallium Nitride) | - | | **Wavelength (Peak)** | 465 - 475 | nm | | **Forward Voltage ($V_F$)** | 3.2 (Typ) / 3.8 (Max) | V | | **Luminous Intensity** | 100 - 250 | mcd | | **Viewing Angle** | 120 | Degrees | | **Package Size** | 1206 (3.2 x 1.6 mm) | Metric | | **Forward Current ($I_F$)** | 20 | mA | --- ## Key Features * **High Efficiency:** Utilizes InGaN technology, which provides superior brightness at low power levels compared to older SiC-based blue LEDs. * **Compact Footprint:** The 1206 package (3.2mm x 1.6mm) makes it ideal for densely packed PCB designs. * **Wide Viewing Angle:** The 120-degree distribution ensures uniform light dispersion for backlighting applications. * **Reliability:** Designed for standard reflow soldering processes and is RoHS compliant. --- ## Application Circuit (Example) To drive this LED using a standard 5V microcontroller (like an Arduino) at 20mA, a current-limiting resistor is required. **Calculation:** $R = \frac{V_{source} - V_F}{I_F} \rightarrow R = \frac{5V - 3.2V}{0.02A} = 90 \Omega$ ```cpp // Schematic representation [5V Supply] --- [91 Ohm Resistor] --- [Anode GHB-3M35-R2 Cathode] --- [GND] ``` --- ## Comparison with Similar Parts | Part Number | Color | Wavelength | Intensity | | :--- | :--- | :--- | :--- | | **GHB-3M35-R2** | Blue | 470nm | 180mcd | | **GHR-3M35-R2** | Red | 630nm | 120mcd | | **GHY-3M35-R2** | Yellow | 590nm | 110mcd |