1N4937G

Overview

The Good-Ark Semiconductor 1N4937G is a fast recovery glass passivated rectifier designed for high-frequency rectification circuits. It features a JEDEC DO-204AL (DO-41) molded plastic package over a glass body, providing Underwriters Laboratories Flammability Classification 94V-0. The device supports 1.0 Ampere operation at an ambient temperature of 75°C without thermal runaway and offers a maximum repetitive peak reverse voltage of 600 Volts. Key electrical characteristics include a typical reverse leakage current of less than 0.1 mA, a maximum non-repetitive peak forward surge current of 30 Amperes, and a peak reverse recovery time of 200 nanoseconds.

Feature Summary

• Fast switching capability engineered for high efficiency in high-frequency rectifier applications
• Cavity-free glass passivated junction construction ensuring stable performance
• High temperature metallurgically bonded design capable of withstanding soldering at 300°C for 10 seconds

Applications

• High frequency rectifier circuits
• General purpose fast recovery rectification
• Power supply conversion stages requiring low leakage

Procurement Notes

Verify the specific manufacturer datasheet to confirm compliance with MIL-S-19500 environmental standards and exact lead dimensions. Ensure the procurement specification matches the required reverse voltage rating within the 1N493x series range. Confirm that the DO-41 package orientation and polarity band alignment meet assembly requirements. Cross-reference terminal plating specifications against MIL-STD-750 Method 2026 solderability criteria.

Selection Notes

Select this component when circuit designs demand fast recovery times around 200 ns and robust surge handling up to 30 A. The 600 V reverse voltage rating suits medium-voltage AC-to-DC conversion tasks. Consider the DO-41 through-hole package for manual assembly or standard PCB mounting processes. Evaluate the 1.0 A continuous forward current limit against peak load demands to ensure operation remains below the 75°C thermal runaway threshold.

Part Context

This part belongs to the 1N493xG series of fast recovery glass passivated rectifiers from Good-Ark Semiconductor. The series spans multiple reverse voltage ratings, with the 1N4937G representing the highest voltage variant at 600 V. All members share identical physical packaging and general electrical profiles, differing primarily in their breakdown voltage thresholds.

Replacement Considerations

Compatible substitutes include Vishay 1N4937GP-E3/54 and onsemi 1N4937RLG. Verify that alternative sources maintain the same DO-41 footprint and 200 ns recovery time specifications.