The **CTC4F-R68M** is a specific part number for a **Fixed Inductor** (Choke), typically manufactured by companies like Central Technologies. It belongs to a series of axial-leaded, conformally coated inductors used for various filtering and energy storage applications. --- ### 1. Technical Specifications Below is a breakdown of the electrical characteristics and physical parameters based on the part number nomenclature: | Parameter | Specification | Details | | :--- | :--- | :--- | | **Inductance** | 0.68 µH | Represented by "R68" | | **Tolerance** | ±20% | Represented by "M" | | **Type** | Fixed Inductor | Axial Lead (Through-Hole) | | **Core Material** | Ferrite / Iron Powder | High-frequency performance | | **Operating Temperature** | -55°C to +105°C | Standard industrial range | | **Coating** | Epoxy Resin | Conformally coated for protection | --- ### 2. Part Number Breakdown Understanding the alphanumeric code helps in identifying the component's properties: 1. **CTC4F**: The Series identifier. This usually indicates the physical size and the material construction (Conformally Coated Inductor). 2. **R68**: The Inductance value. The "R" acts as a decimal point. Therefore, `R68 = 0.68 microhenries (µH)`. 3. **M**: The Tolerance code. In the world of passive components: * `J` = ±5% * `K` = ±10% * **`M` = ±20%** --- ### 3. Key Applications Inductors like the CTC4F-R68M are found in circuits requiring signal conditioning or noise suppression: * **RF Coupling/Decoupling:** Used to block high-frequency noise while allowing DC to pass. * **Filtering:** Common in Power Supplies (SMPS) to smooth out ripples. * **Telecommunications:** Signal processing in communication hardware. * **EMI Suppression:** Reducing electromagnetic interference in consumer electronics. --- ### 4. Physical Characteristics * **Form Factor:** It looks like a resistor (axial leads) but is usually slightly thicker and coated in a green or cyan epoxy. * **Marking:** Often uses a color-coding system (similar to resistors) or direct text printing to indicate value and tolerance. ---