Based on technical specifications for electronics components, the **LO-R971** typically refers to a specific type of **SMD (Surface Mount Device) LED** manufactured by OSRAM Opto Semiconductors (now ams OSRAM). It belongs to the **CHIPLED 0805** family. --- ## 1. Core Specifications The LO-R971 is a high-efficiency orange LED. Below are its primary technical parameters: | Parameter | Specification | | :--- | :--- | | **Color** | Orange (606 nm dominant wavelength) | | **Package Size** | 0805 (2.0 mm x 1.25 mm x 0.8 mm) | | **Technology** | InGaAlP (Indium Gallium Aluminum Phosphide) | | **Luminous Intensity** | ~45 to 112 mcd (typical) | | **Forward Voltage ($V_f$)** | 2.0V (Typical) / 2.4V (Max) | | **Viewing Angle** | 160° (Wide spread) | | **Operating Temperature** | -40°C to +85°C | --- ## 2. Key Electronic Features * **Low Current Operation:** Designed to function efficiently at low currents (typically tested at 20mA). * **Reverse Voltage:** Maximum reverse voltage is usually rated at **12V**, which is relatively robust for a small LED. * **Thermal Resistance:** It features a junction/solder point resistance of approximately **450 K/W**, meaning heat dissipation must be considered in dense PCB layouts. * **SMT Compatibility:** Fully compatible with automated "pick and place" machines and infrared (IR) reflow soldering processes. --- ## 3. Pinout and Polarity Because the 0805 package is polarized, the LO-R971 has specific markings to ensure correct installation: 1. **Anode (+):** The positive terminal. 2. **Cathode (-):** The negative terminal, usually marked with a green square or a notch on the underside of the component. --- ## 4. Typical Applications Due to its small footprint and reliable brightness, the LO-R971 is commonly used in: * **Backlighting:** LCDs, switches, and push-buttons. * **Indicators:** Status lights in consumer electronics (modems, chargers). * **Automotive:** Interior lighting (dashboards and console illumination). * **Optical Coupling:** Used in miniature light barriers.