1N4935

Overview

The onsemi 1N4935 is a single-element silicon fast recovery rectifier diode housed in the DO-41 axial through-hole package. It supports a maximum repetitive peak reverse voltage of 200 V and an average forward rectified current of 1 A. The device features a low forward voltage drop of 1.2 V at rated current and a maximum non-repetitive peak forward surge current capability of 30 A. Electrical characteristics include a maximum reverse leakage current of 5 uA and a typical reverse recovery time of 150 ns. It operates within a junction temperature range of -50 °C to +150 °C with a power dissipation rating of 2.5 W.

Feature Summary

• Fast recovery switching performance suitable for high-frequency applications
• Glass passivated junction construction for enhanced reliability
• High surge current capability for robust operation under transient loads

Applications

• General-purpose rectification in power supply circuits
• Free-wheeling diodes in inductive load protection
• DC-DC converter output rectification

Procurement Notes

Verify the specific manufacturer suffix (e.g., G, RLG) as availability varies by production line. Confirm RoHS compliance status for the exact orderable part number, as legacy versions may differ. Check datasheet revisions to ensure pinout and thermal resistance parameters match your design requirements before finalizing procurement.

Selection Notes

Select this component when a 200 V blocking voltage and 1 A continuous current are required in a standard axial package. Ensure the application frequency aligns with the 150 ns reverse recovery time to minimize switching losses. Verify that the ambient temperature allows for adequate heat dissipation given the 2.5 W power dissipation limit in the DO-41 case.

Part Context

This device belongs to the 1N493x series of fast recovery rectifiers, which share identical electrical ratings but differ in reverse voltage capabilities ranging from 50 V to 600 V. The 1N4935 specifically targets the 200 V tier within this family, offering a standardized solution for medium-voltage rectification tasks requiring fast switching characteristics in through-hole designs.

Replacement Considerations

Cross-reference with other manufacturers' 1N4935 equivalents such as Vishay or Rectron variants. Ensure substitute parts maintain the DO-41 footprint and meet the 200 V / 1 A / 150 ns specifications. Verify that any alternative glass-passivated diodes offer comparable surge current ratings.