The term **746-R** usually refers to a specific component within the realm of **Passive Components**, most commonly associated with **Potentiometers (Trimmers)** or specific **Ceramic Capacitors** depending on the manufacturer prefix (such as Bourns or Murata). Below is a breakdown of the typical electronic specifications and types associated with the "746-R" designation. --- ### 1. Common Component Types The most frequent use of "746-R" in electronic catalogs refers to **Trimming Potentiometers**. | Component Type | Description | Key Function | | :--- | :--- | :--- | | **Trimmer Potentiometer** | A miniature variable resistor used for circuit tuning and calibration. | Adjusting voltage levels or gain. | | **Fixed Resistor** | Occasionally used in high-precision military-grade resistor networks. | Providing stable resistance. | | **RF Filter/Coupler** | Specific 746MHz bands used in telecommunications. | Signal processing for LTE/Radio. | --- ### 2. Technical Specifications (General Trimmer Case) If the 746-R refers to the industry-standard variable resistor series, the technical parameters are generally as follows: * **Resistance Range:** Typically available from $10 \Omega$ to $2 M\Omega$. * **Tolerance:** $\pm 10\%$ standard. * **Power Rating:** Usually $0.25W$ to $0.5W$ at $70^\circ C$. * **Rotational Life:** 200 cycles (designed for "set and forget" use). * **Mounting Type:** Through-hole (PCB) or Surface Mount (SMD). --- ### 3. Decoding the "R" Suffix In electronic part numbering, the **-R** suffix is critical and usually denotes one of three things: 1. **RoHS Compliance:** The part is lead-free and meets environmental safety standards. 2. **Taping/Reel:** Indicates the packaging method (Tape & Reel) for automated assembly. 3. **Resistance Value:** If "R" is placed within numbers (e.g., 4R7), it acts as a decimal point for Ohms ($4.7 \Omega$). --- ### 4. Identification Guide To identify your specific part, check for the manufacturer logo on the casing: ```text [ Logo ] <-- (e.g., "BI" for BI Technologies or "B" for Bourns) 746-R <-- Model and RoHS indicator 103 <-- Resistance Code (103 = 10,000 Ohms or 10k) ``` ---