The **SFSKB4M30GF00-R1** is a specialized surface-mount electronic component, specifically a **Ceramic Filter** manufactured by Murata Electronics. These components are primarily used in communication systems to allow specific frequencies to pass while blocking others. --- ## 1. Technical Specifications The following table outlines the key technical parameters for this specific part: | Parameter | Specification | | :--- | :--- | | **Component Type** | Ceramic Filter (SFecV series) | | **Center Frequency** | 4.300 MHz | | **Bandwidth (3dB)** | ± 60 kHz min. | | **Insertion Loss** | 6.0 dB max. | | **Stop Band Attenuation** | 20 dB min. (at ± 250 kHz) | | **Input/Output Impedance** | 1000 $\Omega$ | | **Operating Temperature** | -20°C to +80°C | | **Mounting Type** | Surface Mount (SMD) | --- ## 2. Core Electronic Functions This device functions based on the **Piezoelectric Effect**. It converts electrical signals into mechanical vibrations and back into electrical signals. ### Key Characteristics: * **Frequency Selectivity:** It is designed for Intermediate Frequency (IF) stages, typically in FM radio receivers or specialized communication equipment. * **Small Footprint:** Being an SMD (Surface Mount Device), it is optimized for automated high-density PCB assembly. * **Stability:** Unlike LC filters (Inductor-Capacitor), ceramic filters offer higher Q-factors and better temperature stability without the need for manual tuning. --- ## 3. Pin Configuration and Application While the specific footprint is proprietary to Murata's SFecV series, it generally follows a standard 3-terminal or 4-terminal layout: 1. **Input:** Where the signal enters from the previous mixer or amplifier stage. 2. **Ground:** Connects to the system's common reference to ensure signal integrity. 3. **Output:** Delivers the filtered 4.3MHz signal to the next stage (e.g., a discriminator or demodulator). ### Common Use Cases: * **Wireless Communication:** Paging systems and low-frequency RF modules. * **Remote Controls:** Signal processing in industrial remote control units. * **Audio/Visual Equipment:** Handling IF signals in legacy or specialized broadcast hardware. --- ## 4. Part Number Breakdown (Interpreted) The alphanumeric code provides specific manufacturing details: * **SFS:** Series identifier (Surface Mount Filter). * **KB:** Discriminates the bandwidth and shape factor. * **4M30:** Represents the Center Frequency (4.30 MHz). * **R1:** Indicates the packaging style (usually Tape & Reel).