The **SML-R13PTT86P** is a high-brightness, surface-mount (SMD) Light Emitting Diode (LED) manufactured by **ROHM Semiconductor**. It belongs to the SML-R13 series, known for its compact footprint and high reliability in automotive and industrial applications. --- ### ## Technical Specifications The following table outlines the key electrical and optical characteristics of the SML-R13PTT86P: | Parameter | Specification | | :--- | :--- | | **Emitting Color** | Red | | **Material** | AlGaInP (Aluminum Gallium Indium Phosphide) | | **Package Size** | 1608 Metric (0603 Inch) | | **Dimensions** | 1.6mm x 0.8mm x 0.36mm | | **Luminous Intensity** | 25 mcd to 63 mcd (typical) | | **Forward Voltage ($V_F$)** | 1.9V (typical) | | **Forward Current ($I_F$)** | 20mA (nominal) | | **Dominant Wavelength** | 624 nm | | **Operating Temperature** | -40°C to +100°C | --- ### ### Key Features 1. **Ultra-Thin Profile:** With a height of only 0.36mm, it is ideal for thin devices like smartphones, wearables, and membrane switches. 2. **Ex-Device Technology:** ROHM utilizes original device technology to achieve high brightness and long-term reliability compared to standard LEDs. 3. **AEC-Q101 Qualified:** This part is often used in automotive environments, meaning it is tested for high stress and temperature fluctuations. 4. **Solderability:** Features a gold (Au) plating finish on the electrodes, which prevents oxidation and ensures excellent solder wetting. --- ### ### Typical Application Circuit When designing with the SML-R13PTT86P, a current-limiting resistor is required to prevent burnout. ```cpp // Calculation Example: // Supply Voltage (Vcc) = 5V // Forward Voltage (Vf) = 1.9V // Target Current (If) = 10mA (0.01A) R = (Vcc - Vf) / If R = (5V - 1.9V) / 0.01A R = 310 Ohms (Standard value: 330 Ohms) ``` --- ### ### Pin Configuration and Polarity The device is a two-terminal SMD component. * **Anode (+):** Usually identified by a notch or a green mark on the bottom of the package. * **Cathode (-):** The opposite terminal.