Product: 50 × TIP120 NPN Darlington Transistors, TO-220 package Key benefits — why you need these: High current gain: TIP120 Darlington configuration amplifies input current so low-current control signals (from microcontrollers, logic gates, or drivers) can switch higher current loads reliably. Reliable switching performance: Designed for consistent on/off switching, reducing component complexity when driving loads that need straightforward digital control. Easy board installation: The TO-220 through-hole package simplifies PCB mounting and wiring for prototypes and production boards, and keeps mechanical handling consistent across assemblies. Bulk quantity for projects and production: Pack of 50 reduces part changes and purchasing frequency for batch builds, repairs, or educational use. What it does and how it solves problems: Acts as an NPN power switch and amplifier, converting small base currents into larger collector currents to drive external loads. Eliminates the need for extra driver stages in many designs by providing built-in Darlington gain, saving board space and design time. Provides a standard, rugged form factor that integrates with common PCB layouts and connector schemes. Important attributes: Model: TIP120 Type: NPN Darlington transistor Package: TO-220 (through-hole) Quantity: 50 pieces Function: Power amplification and switching control Compatibility: Suitable for a wide range of electronic circuits requiring an NPN Darlington device Typical applications (practical use scenarios): Motor control in robotics and automation — use TIP120 transistors to switch DC motors and control speed or direction from microcontrollers or driver logic. Driving LED strips, high-current LED arrays, and lighting circuits — provide the necessary current boost when controller outputs are insufficient. Switching relays, solenoids, and valves — use for reliable on/off control in control panels, instrumentation, and industrial prototypes. What makes it stand out: Darlington pair topology provides higher current gain compared with single-transistor solutions, simplifying driver circuitry. Standard TO-220 package ensures straightforward mounting and consistent handling across projects and production runs. Bulk pack of 50 helps maintain inventory for iterative development, classroom labs, or small-scale manufacturing. Compatibility and integration tips: Use with appropriate base resistors and flyback diodes where inductive loads are present. Mount on standard through-hole PCBs designed for TO-220 components for secure mechanical and electrical connections. Verify thermal and current requirements in your design; the TIP120 is chosen for its gain and switching behavior rather than as a final thermal spec—add heat management as needed for sustained high-current use. Package includes: 50 pieces of TIP120 NPN Darlington transistors in TO-220 package