The term **1DE-R** generally refers to a specific marking or part numbering convention used for electronic components, most commonly associated with **Surface Mount Device (SMD) resistors** or specific **Schottky Barrier Diodes**. Below is a breakdown of the common interpretations of this part code in the electronics industry. --- ### 1. SMD Resistor Identification (E-96 Series) In the context of SMD resistors (typically 0603 package size), "1DE" is a code used under the **EIA-96 marking standard**. This standard uses a two-digit number for the value and a letter for the multiplier. | Code Segment | Meaning | Value/Multiplier | | :--- | :--- | :--- | | **1D** | Significant Digits | 102 (from EIA-96 table) | | **E** | Multiplier | $10^4$ (10,000) | | **-R** | Suffix | Often denotes "RoHS Compliant" or "Reel" packaging | **Calculation:** $102 \times 10,000 = 1,020,000 \, \Omega$ or **1.02 MΩ**. --- ### 2. Schottky Barrier Diodes (Marking Codes) "1DE" is also a common top-side marking for small-signal Schottky diodes in miniature packages like SOD-123 or SOT-23. #### Common Specifications: * **Component Type:** Schottky Barrier Diode. * **Function:** Used for high-speed switching, circuit protection, or voltage clamping. * **Key Characteristics:** * **Low Forward Voltage ($V_f$):** Typically 0.3V to 0.5V. * **Fast Switching:** Extremely low reverse recovery time. * **Typical Voltage Rating:** Often 20V to 40V depending on the specific manufacturer (e.g., Diodes Inc. or ON Semi). --- ### 3. Summary of Technical Attributes If you are looking at a physical component labeled **1DE-R**, refer to this table for general specifications: | Feature | Specification (Typical) | | :--- | :--- | | **Package Type** | SMD (Surface Mount Device) | | **Standard** | RoHS Compliant (indicated by -R) | | **Common Form Factors** | 0603 (Resistor) or SOD-123 (Diode) | | **Application** | Power management, signal logic, or impedance matching | --- ### How to Verify To be 100% certain of the part's function, you should: 1. **Check the PCB RefDes:** Is it labeled **R** (Resistor) or **D** (Diode)? 2. **Measure with a Multimeter:** * If it shows high resistance (1.02MΩ) in both directions, it is a resistor. * If it shows a low voltage drop (~0.3V) in one direction and "OL" in the other, it is a Schottky diode.