The **SMTL2-GC** is a specific surface-mount electronic component, primarily known as a **Surface Mount LED (Light Emitting Diode)** manufactured by Bivar Inc. It belongs to the SMTL2 series, which are miniature, low-profile LEDs designed for space-constrained applications. --- ### 1. Key Technical Specifications The "GC" suffix typically denotes the color and material composition (Green / GaP). Below are the primary technical parameters: | Feature | Specification | | :--- | :--- | | **Component Type** | Surface Mount LED (SMD) | | **Package Style** | PLCC-2 (Plastic Leaded Chip Carrier) | | **Color** | Green | | **Material** | GaP (Gallium Phosphide) | | **Luminous Intensity** | ~6 mcd (typical at 20mA) | | **Wavelength** | 568 nm (Peak) | | **Forward Voltage ($V_f$)** | 2.1V (Typical) / 2.6V (Max) | | **Viewing Angle** | 120 Degrees | --- ### 2. Physical Characteristics The SMTL2-GC is designed for automated assembly processes. Its physical attributes include: * **Dimensions:** Approximately 3.5mm x 2.8mm x 1.9mm. * **Mounting:** SMT (Surface Mount Technology), allowing it to be soldered directly onto the PCB traces. * **Lead Frame:** Features a flat-lead design that provides a stable base for soldering and efficient heat dissipation for the small chip. --- ### 3. Electronic Behavior and Circuitry When integrating the SMTL2-GC into a circuit, consider the following electronic principles: #### Current Limiting Since it is a diode, a series resistor ($R$) is required to prevent the LED from burning out. You can calculate the resistor value using Ohm's Law: ```text R = (V_supply - V_f) / I_f ``` * **$V_{supply}$**: Your power source voltage. * **$V_f$**: 2.1V (Forward voltage of SMTL2-GC). * **$I_f$**: Desired current (usually 20mA or 0.02A). #### Polarity As a polarized component, it will only conduct electricity and emit light when the Anode is connected to the positive side and the Cathode to the negative side. In the PLCC-2 package, the **Cathode** is usually marked by a small notch or "chamfer" on one corner of the plastic body. --- ### 4. Common Applications Due to its small footprint and standard green output, this part is commonly used in: * **Status Indicators:** On/Off lights for consumer electronics. * **Backlighting:** Illumination for LCDs or membrane switches. * **Telecommunications:** Signal indicators on routers or modems. * **Industrial Equipment:** Control panel status lights.