1N4934G

Overview

The onsemi 1N4934G is an axial-lead, glass-passivated fast recovery rectifier designed for high-efficiency switching applications. It features a peak repetitive reverse voltage of 100 V and supports an average rectified forward current of 1.0 A at 75°C ambient temperature. The device exhibits a typical reverse recovery time of 150 ns, enabling operation at frequencies up to 250 kHz. Electrical characteristics include a maximum instantaneous forward voltage of 1.2 V at 150°C junction temperature and a non-repetitive peak surge current rating of 30 A.

Feature Summary

• Fast recovery performance with typical 150 ns reverse recovery time
• Glass passivation for enhanced reliability and low leakage current
• Plastic molded epoxy case with corrosion-resistant external surfaces
• Capable of handling high surge currents for robust circuit protection

Applications

• DC power supplies
• Inverters and converters
• Ultrasonic systems
• Choppers
• Free wheeling diodes

Procurement Notes

Verify the specific ordering suffix to confirm packaging format. The 'G' suffix indicates a lead-free device shipped in bags containing 1,000 units. For tape and reel configurations, the 'RL' suffix must be added to the part number, resulting in reels of 5,000 units. Confirm that the required quantity matches the available shipping options before finalizing procurement.

Selection Notes

Select this component when a 100 V blocking capability is required alongside fast switching speeds. Ensure the application operates within the specified thermal limits, as the average forward current must be derated by 20% for capacitive loads. Verify that the operating frequency does not exceed 250 kHz to maintain optimal efficiency and prevent excessive heat generation during switching transitions.

Part Context

This device belongs to the 1N493x series of fast recovery rectifiers manufactured by onsemi. The series includes variants with different voltage ratings, such as the 1N4933 (50 V) and 1N4935 (200 V). All members share similar mechanical dimensions and electrical characteristics, differing primarily in their peak repetitive reverse voltage specifications.

Replacement Considerations

Compatible substitutes within the same family include the 1N4933, 1N4935, 1N4936, and 1N4937. When replacing, ensure the substitute part meets or exceeds the 100 V reverse voltage requirement and maintains comparable forward current and recovery time specifications.