1N1188R

Single Diodes Overview

The Microchip Technology 1N1188R is a silicon standard recovery rectifier diode designed for high-power applications. It features a stud mount configuration within the DO-203AB (DO-5) package, facilitating robust thermal management and secure mechanical installation. The device is rated for a maximum average forward current of 40A and a peak repetitive reverse voltage of 400V. Key electrical characteristics include a maximum non-repetitive peak surge current of 600A at 8.3ms single half-sine-wave and a maximum reverse current of 10µA at 400V. The component operates with a maximum junction temperature of 175°C and utilizes a screw-type terminal connection.

Single Diodes Feature Summary

• High-current capability with a 40A average forward current rating
• Robust surge handling with a 600A non-repetitive peak surge current capacity
• High-temperature operation supported by a 175°C maximum junction temperature limit
• Secure mechanical mounting via stud mount design in DO-203AB package

Single Diodes Applications

• Industrial power supply rectification
• Motor drive systems
• Welding equipment power stages

Single Diodes Procurement Notes

Verify the manufacturer marking on the component body to confirm it reads Microchip Technology or its predecessor identifiers, as this part number is also produced by other manufacturers such as GeneSiC. Ensure the package type matches the required DO-203AB footprint and that the lead configuration aligns with the specific board layout requirements for stud-mounted installations.

Single Diodes Selection Notes

Select this component when a standard recovery silicon diode is required for circuits demanding 400V blocking voltage and continuous currents up to 40A. The stud mount style is essential for applications requiring direct heatsink attachment for efficient thermal dissipation. Consider the reverse leakage current specifications if operating near the maximum voltage limits in high-temperature environments.

Single Diodes Part Context

The 1N1188R belongs to the broader family of general-purpose silicon power rectifiers. It shares functional similarities with other industry-standard rectifying diodes but is distinguished by its specific 40A current rating and 400V voltage class. This series is commonly utilized in medium-to-high power conversion systems where reliability under thermal stress is critical.

Single Diodes Replacement Considerations

The VS-1N1188R from Vishay/GeneSiC is a confirmed substitute part number offering identical electrical ratings and package dimensions. Verify pinout compatibility and thermal resistance values before implementation.