- DescriptionThe 1N400x series is foundational to modern electronics, and the M4 represents its highly efficient surface-mount evolution. Designed for standard-frequency power routing and robust voltage blocking, the 1N4004 SMD Diode (M4) is an excellent choice for converting AC to DC and protecting sensitive components from medium-voltage reverse spikes.Reliable 400V Blocking PowerWhile small signal diodes are built for speed and Schottky diodes are built for low voltage drops, the 1N4004 SMD Diode (M4) is built for dependable mid-range protection. It boasts a Maximum Repetitive Peak Reverse Voltage (VRRM) of 400 Volts. This blocking capacity makes it perfect for directly rectifying standard AC voltages or serving as a highly resilient freewheeling diode across mechanical relays, small motors, and solenoids.Robust SMA FootprintTo bring this reliable performance to modern boards, this version is housed in an industry-standard SMA (DO-214AC) surface-mount package. The flat leads provide an excellent, large solderable surface area that easily dissipates heat during continuous 1A operation while remaining robust against physical vibration. Integrating the 1N4004 SMD Diode (M4) into your workflow is simple, as the cathode is clearly identified by the printed band, ensuring perfect alignment during automated pick-and-place assembly or manual board repairs.Key FeaturesDependable Voltage Rating: Safely blocks up to 400V, making it suitable for a wide variety of AC mains and inductive applications.High Current Handling: Safely passes up to 1.0A of continuous forward current.Modern Footprint: The SMA surface-mount package optimizes PCB real estate while maintaining traditional through-hole reliability.Technical SpecificationsComponent Type: General Purpose Rectifier DiodeMaximum Repetitive Peak Reverse Voltage (VRRM): 400VMaximum RMS Voltage (VRMS): 280VMaximum Average Forward Current (IF(AV)): 1.0APeak Forward Surge Current (IFSM): 30A (for 8.3ms single half sine-wave)Maximum Forward Voltage Drop (VF): 1.1V at 1.0APackage Type: SMA / DO-214AC (Surface Mount)Top Marking Code: M4Ideal ApplicationsAC to DC Rectification: Building full-wave bridge rectifiers for mid-voltage power supplies and AC adapters.Inductive Load Protection: Serving as a freewheeling/flyback diode across motors, contactors, and solenoids.Reverse Polarity Protection: Providing a robust barrier against backward battery or power supply insertion in DC circuits.Electronics Repair: Replacing blown M4 diodes in commercial power adapters, appliances, and industrial control boards.
