The **LTHZ-243-R** is a specific electronic component, typically categorized as a **Surface Mount Device (SMD) LED**, often used in industrial indicators, consumer electronics, and signal equipment. Below is a detailed breakdown of its electronic characteristics and specifications. --- ## 1. Component Overview The LTHZ-243-R is an **AlGaInP (Aluminum Gallium Indium Phosphide)** based light-emitting diode. It is designed for high-efficiency light output in a compact footprint. ### Technical Specifications | Parameter | Description | Typical Value | | :--- | :--- | :--- | | **Color** | Hyper Red | 630 nm - 640 nm | | **Package Type** | Chip LED (SMD) | 1206 (3216 Metric) | | **Forward Voltage ($V_f$)** | Typical voltage drop | 2.0V - 2.4V | | **Forward Current ($I_f$)** | Standard operating current | 20mA | | **Luminous Intensity** | Brightness at 20mA | 45 - 112 mcd | | **Viewing Angle** | Beam spread | 130° | | **Lens Type** | Material/Transparency | Water Clear | --- ## 2. Pinout and Internal Structure As an SMD LED, the part has two main terminals. Polarity is critical for correct operation: * **Anode (+):** The positive terminal, usually indicated by a small notch or mark on the underside of the PCB package. * **Cathode (-):** The negative terminal, connected to the ground side of the circuit. --- ## 3. Circuit Integration To use the LTHZ-243-R safely, a current-limiting resistor is required to prevent the LED from burning out. ### Basic Calculation Formula: The resistor value ($R$) is calculated using Ohm's Law: `R = (V_source - V_f) / I_f` #### Example Circuit: If using a **5V** power supply: 1. **V_source**: 5V 2. **V_f**: 2.0V 3. **I_f**: 0.02A (20mA) 4. **Result**: `(5 - 2.0) / 0.02 = 150 Ohms` ```cpp // Schematic Representation [+5V] --- [Resistor 150Ω] --- [Anode LTHZ-243-R Cathode] --- [GND] ``` --- ## 4. Key Features * **Reliability:** Long life-span compared to traditional bulbs. * **Low Power:** Ideal for battery-powered applications due to low current draw. * **Pick-and-Place Compatible:** Designed for automated assembly lines using Tape & Reel packaging. * **RoHS Compliant:** Lead-free and environmentally friendly. ---