1N4948G

Overview

The Good-Ark Semiconductor 1N4948G is a silicon rectifier diode designed for general-purpose applications. It features a single-element configuration housed in the DO-41 (DO-204AL) axial leaded package. The device supports a maximum average forward rectified current of 1 A and withstands a maximum repetitive peak reverse voltage of 1000 V. Key electrical characteristics include a maximum non-repetitive peak forward surge current of 30 A, a maximum reverse leakage current of 5 µA, and a maximum reverse recovery time of 0.5 µs. The component operates within a junction temperature range up to 150 °C and a storage temperature range from -55 °C to 175 °C.

Feature Summary

• Glass passivated construction for improved stability and reliability under various environmental conditions.
• High surge current capability to handle transient load demands without failure.
• Utilizes void-free molded plastic technique ensuring mechanical durability and flammability classification 94V-0.

Applications

• General purpose rectification in power supply circuits.
• Reverse polarity protection in electronic devices.
• Clamping and freewheeling applications in inductive load management.

Procurement Notes

Verify the manufacturer designation explicitly as Good-Ark Semiconductor, as the 1N4948G part number is widely produced by multiple vendors including Vishay and New Jersey Semiconductor. Confirm that the specific datasheet provided matches the Good-Ark specifications regarding the 1000 V rating and 0.5 µs reverse recovery time. Ensure the ordering information specifies the DO-41 package style and axial lead configuration required for your assembly process.

Selection Notes

Select this component when a 1 A through-hole rectifier with a 1000 V blocking voltage is required. It is suitable for designs needing fast recovery characteristics compared to standard slow rectifiers, indicated by the 0.5 µs maximum reverse recovery time. Consider the thermal constraints, noting the 150 °C maximum junction temperature limit, and ensure the PCB layout accommodates the axial leads of the DO-41 package for proper mounting and heat dissipation.

Part Context

This component belongs to the family of glass-passivated silicon rectifier diodes commonly used in industrial and consumer electronics. The 1N4948G variant specifically addresses high-voltage requirements within the standard 1 A current class. It serves as a robust solution for AC-to-DC conversion stages and switching applications where reliable isolation and moderate speed are critical design parameters.

Replacement Considerations

Compatible substitutes include the 1N4948GP-E3/73 from Vishay and the generic 1N4948 from other manufacturers. Verify pinout compatibility and ensure the replacement part meets or exceeds the 1000 V reverse voltage and 1 A forward current ratings. Check if the alternative offers similar reverse recovery times for circuit performance parity.