The designation **8E-R** is most commonly associated with **Passive Components**, specifically **Surface Mount Device (SMD) Resistors** or specific **Power Inductors/Beads**. In the electronics industry, "8E" typically refers to a specific size or tolerance code depending on the manufacturer (such as Murata or KOA Speer). --- ### 1. Breakdown of the "8E-R" Code In many electronic marking systems (especially for resistors), the code is broken down as follows: | Segment | Meaning | Description | | :--- | :--- | :--- | | **8E** | **Body Size / Series** | Often corresponds to the **0805** (inch) or **2012** (metric) package size. | | **R** | **Resistance / Decimal** | Acts as a decimal point in Ω (Ohms) or signifies a "Resistor" category. | --- ### 2. Common Applications for 8E-R Components Depending on the specific datasheet (e.g., for Ferrite Beads or Resistor Networks), here are the primary uses: #### A. SMD Ferrite Beads (EMI Suppression) In series like the Murata BLM series, "8E" can denote a specific impedance characteristic. * **Function:** Used to filter high-frequency noise in DC power lines. * **Common Use:** Power supply decoupling for microprocessors. #### B. Resistor Networks If "8E" refers to an 8-pin resistor network: * **Configuration:** Usually 4 or 8 individual resistors in one package. * **Benefit:** Saves PCB space and improves manufacturing speed. --- ### 3. Key Specifications to Verify If you are looking for a replacement part, you must check these parameters: | Parameter | Typical Value for 8E Series | | :--- | :--- | | **Package Size** | 0805 (2.0mm x 1.25mm) | | **Power Rating** | 0.125W to 0.25W | | **Tolerance** | ±1% (F) or ±5% (J) | | **Operating Temp** | -55°C to +125°C | --- ### 4. Code Identification Example If the part is a resistor marked **8R2**: ```text 8 = First Digit R = Decimal Point 2 = Second Digit Result = 8.2 Ohms ``` If the part is a Ferrite Bead (e.g., **BLM21PG300S8E**): ```text 8E = Specific electrode construction for high current applications. ``` ---