Includes four pieces of the 3K40CAM3/57 DO214AB2 component. Each unit is a surfacemount device packaged in the DO214AB2 form factor, suitable for automated PCB assembly. Key benefits Compact SMBstyle package enables dense PCB layouts and easy integration into existing boards. Suitable for protecting circuits from transient events on power and signal lines, helping to reduce the risk of damage from voltage spikes. Consistent, identical units per support repeatable performance across multiple channels or boards. Designed for compatibility with standard surfacemount assembly processes and reflow soldering. Key attributes Quantity: 4 pieces per package Model: 3K40CAM3/57 Package type: DO214AB2 (SMBstyle) surfacemount Mounting: Surfacemount on printed circuit boards Material and construction: Manufactured for reliable mechanical and electrical performance in typical PCB environments Electrical ratings and environmental specs: Refer to the manufacturer datasheet for exact voltage, current, power, and environmental specifications Applications and use cases Power supply protection: Safeguard input rails and critical circuitry on consumer electronics and power adapters from transient surges. Automotive and industrial control: Provide surge and overvoltage protection for ECU power lines and sensor interfaces in harsh electrical environments. Data and signal line protection: Shield USB, Ethernet, or other speed interfaces on PCBs from transient events and ESD. Handling and installation notes For proper performance, install in accordance with the referenced datasheet and PCB design guidelines. Reflow soldering is compatible with standard SMT processes; verify temperature profiles per the component's datasheet. Check electrical ratings and environmental specs in the datasheet to ensure suitability for your application. This description reflects the product model, package, and basic characteristics as provided. For exact electrical specs, ratings, tolerance, and compliance details, consult the official datasheet or the supplier's specification sheet.