The BAS4000E318 is a fast switching diode product in a compact SOT233 package. This listing provides a pack of 23 pieces in the BAS40 family, suitable for use in smallsignal and speed circuitry. The device is designed for general purpose switching applications in surfacemount designs. Key benefits Compact SOT233 packaging enables dense, spacesaving PCB layouts without compromising performance. Fast switching capability supports speed signal paths and pulsedriven applications. Silicon construction provides reliable switching behavior for common electronics projects and production builds. Standard SOT233 footprint promotes easy integration with widely used PCB processes and test fixtures. 23piece quantity is convenient for prototyping, stocking, and production runs. Key attributes Functionality: fast switching diode suitable for smallsignal switching and related applications. Compatibility: compatible with standard SOT233 footprints and common PCB assembly methods. Size: SOT233 package, compact threelead configuration. Material: silicon diode construction. Performance: designed for fast switching in general purpose signal applications. Package: 23 pieces per pack in the BAS4000E318 series. Applications and use cases Fast signal switching in microcontroller interfaces (for example, logic paths and edgetriggered circuits in SPI, I2C, or other digital interfaces). Signal routing, level shifting, or steering in compact analog/digital signal paths on small PCBs. Smallsignal rectification, envelope detection, or clamping in RF, audio, or mixedsignal circuits where fast response is beneficial. Notes Refer to the official BAS4000E318 datasheet for exact electrical specifications, including breakdown voltage, forward voltage characteristics, and current ratings. This description reflects the product's branding, model, packaging, and intended use within a SOT233 diode family.