1N4003

Single Diodes Overview

The SMC Diode Solutions 1N4003 is a standard recovery rectifier diode featuring a silicon planar junction structure. It provides a maximum average forward rectified current of 1.0 A and a repetitive peak reverse voltage rating of 200 V. The device utilizes a DO-41 axial leaded plastic package with an isolated cathode marking. Key electrical characteristics include a maximum non-repetitive peak forward surge current of 30 A at 8.3 ms single half-sine-wave impulse, a maximum DC reverse leakage current of 5.0 µA at rated voltage, and a maximum DC forward voltage drop of 1.1 V at 1.0 A. It operates within a junction temperature range of -65 °C to +175 °C.

Single Diodes Feature Summary

• High forward surge current capability for transient overload protection
• Low forward voltage drop for improved efficiency
• Low reverse leakage current ensuring stable blocking performance
• Glass passivated junction for enhanced environmental reliability

Single Diodes Applications

• AC-to-DC power supply rectification
• General-purpose rectification in low-frequency circuits
• Reverse polarity protection in DC input lines
• Bypass or freewheeling diodes in inductive load circuits

Single Diodes Procurement Notes

Verify the specific manufacturer suffix against the original design specification, as the 1N4003 designation is utilized by multiple component producers including onsemi, Vishay, and others. Confirm that the sourced unit matches the required package outline and pin configuration. Ensure compliance with relevant RoHS directives if lead-free construction is mandated for the assembly process. Cross-reference the datasheet revision date to confirm parameter stability.

Single Diodes Selection Notes

Select this component when a robust general-purpose rectifier is required for mains frequency applications. The 200 V reverse voltage rating suits systems operating below this threshold, while the 1.0 A current capacity supports moderate power loads. Consider the thermal management requirements given the 1 W power dissipation limit. Evaluate the trade-off between the standard recovery time and potential switching losses if used in higher frequency contexts.

Single Diodes Part Context

The 1N4003 belongs to the widely recognized 1N400x series of silicon rectifier diodes, distinguished primarily by its reverse voltage breakdown rating. While the series shares common current handling and package attributes, the 1N4003 specifically targets applications requiring 200 V blocking capability. This places it between lower-voltage variants like the 1N4001 and higher-voltage options such as the 1N4004, providing a standardized solution for mid-range voltage rectification tasks.

Single Diodes Replacement Considerations

Direct functional substitutes include other manufacturers' 1N4003 units, provided they adhere to the same JEDEC DO-41 mechanical dimensions. Equivalent part numbers from different vendors may be interchanged if the electrical parameters match or exceed the original specifications. Verify that any replacement maintains the same glass passivation technology and thermal characteristics.