The term **D46-R** usually refers to a specific marking or component code found in electronic systems. Depending on the context, this most commonly refers to an **SMD (Surface Mount Device) Diode** or a specific **Precision Resistor**. --- ## 1. D46-R as an SMD Component In the world of SMD marking codes, "D46" is often a shorthand for a specific diode or transistor package. ### Common Specifications | Parameter | Typical Value | Notes | | :--- | :--- | :--- | | **Component Type** | Schottky Barrier Diode | High-speed switching | | **Package Style** | SOD-123 or SOT-23 | Small footprint for PCBs | | **Maximum Voltage** | 30V - 40V | Standard logic level protection | | **Current Rating** | 200mA - 500mA | Low power applications | --- ## 2. D46-R as a Resistor Code If the "R" is part of a series designation (often seen in industrial parts like those from **Ohmite** or **TE Connectivity**), it represents a Power Resistor. ### Key Features * **R - Suffix:** Usually denotes "RoHS Compliant" (lead-free). * **Precision:** Often indicates a tolerance of ±0.5% or ±1%. * **Application:** Used in current sensing or voltage divider circuits where thermal stability is required. --- ## 3. Component Identification Table If you are looking at a circuit board and see "D46-R", here is how to identify the part's function: | Identification Mark | Probable Part | Function | | :--- | :--- | :--- | | **D** Prefix | Diode | Rectification or Reverse Polarity Protection. | | **R** Suffix | Resistor / RoHS | Resistance or environmental standard compliance. | | **Marking on Body** | BAS40 / BAT54 | Common Schottky diodes associated with these codes. | --- ### Technical Summary The **D46-R** is likely a **Schottky Diode** in an SMD package, designed for high-frequency switching and low forward voltage drop. The "-R" suffix almost universally signifies that the part is **RoHS compliant**, meaning it is manufactured without hazardous substances like lead. ---