1N1203R

Single Diodes Overview

The Microchip Technology 1N1203R is a standard recovery rectifier diode designed for high-power applications. It features a single configuration with a maximum average forward current of 12 A and a peak repetitive reverse voltage of 300 V. The device utilizes a DO-4 (DO-203AA) stud mount package, ensuring robust thermal management. Key electrical parameters include a maximum forward voltage of 1.2 V at rated current and a surge current capability of 250 A. This silicon power rectifier is engineered for reliability in demanding industrial environments.

Single Diodes Feature Summary

• Standard recovery characteristics suitable for general-purpose rectification
• Stud mount construction for efficient heat dissipation
• High surge current handling capability
• Single-phase, single-element design

Single Diodes Applications

• Industrial power supplies
• Motor drive rectification circuits
• General-purpose DC power conversion

Single Diodes Procurement Notes

Verify the specific manufacturer source, as this part number may be associated with multiple entities including Microchip Technology, Actel, or historical manufacturers like Motorola or Microsemi. Confirm that the received component matches the DO-4 package style and screw-type mounting requirements. Ensure the datasheet aligns with the 300V reverse voltage and 12A forward current specifications before integration into the final design.

Single Diodes Selection Notes

Select this component when a rugged, stud-mount rectifier is required for currents up to 12 A. The 300V rating makes it suitable for lower-voltage AC-to-DC conversion stages. Consider the physical mounting constraints of the DO-4 package and the need for appropriate thermal interface materials due to the stud mount configuration. Verify compatibility with the system's thermal management strategy.

Single Diodes Part Context

The 1N1203R belongs to the legacy 1N series of silicon power rectifiers, originally standardized by JEDEC. These components are widely used in industrial equipment where reliability under high stress is critical. The 'R' suffix typically denotes a specific variant or packaging option within the manufacturer's lineup, often indicating a lead-free or specific military-grade qualification depending on the era of production.

Single Diodes Replacement Considerations

Direct substitutes include the 1N1204R (400V rating) if higher voltage tolerance is acceptable, provided the current and package remain compatible. Other generic equivalents in the DO-4 package with 12A/300V ratings from other manufacturers may serve as alternatives, but pinout and thermal resistance must be verified.