1N4934

Overview

The Diotec Semiconductor 1N4934 is a fast recovery rectifier diode designed for high-efficiency switching applications. It features an average forward current rating of 1 A and a maximum repetitive peak reverse voltage of 100 V. The device utilizes silicon technology and is housed in the DO-41 axial leaded package. Key electrical characteristics include a maximum non-repetitive peak forward surge current of 30 A, a typical reverse leakage current of 5 uA, and a maximum reverse recovery time of 200 ns. The component supports a maximum junction temperature of 150 °C and operates within a temperature range from -65 °C to +150 °C.

Feature Summary

• Fast switching capability optimized for high efficiency
• Low forward voltage drop for reduced power loss
• Low leakage current ensuring stable performance
• High forward surge current capability

Applications

• Fast switching rectification in power supplies
• Inverter circuits
• Converter topologies
• Freewheeling diodes for consumer electronics

Procurement Notes

Verify the specific manufacturer designation when sourcing, as the 1N4934 specification is widely produced by multiple semiconductor vendors including Rectron, Vishay, and Diodes Incorporated. Confirm that the received component matches the required 100 V reverse voltage and 1 A current ratings. Ensure the package type corresponds to the design requirements, typically DO-41 for this standard. Cross-reference datasheets to validate parameters such as reverse recovery time and thermal resistance before integration.

Selection Notes

Select the 1N4934 variant specifically manufactured by Diotec Semiconductor when supply chain consistency or specific quality certifications are required. While electrically equivalent to other manufacturers' parts, verify compliance with specific environmental directives such as RoHS if mandated by the project. Consider the operating temperature range and thermal management needs, as the device supports up to 150 °C junction temperature. Evaluate the trade-off between the standard 200 ns recovery time and application speed requirements compared to ultrafast alternatives.

Part Context

The 1N4934 belongs to the standard 1N49xx series of fast recovery rectifiers, which share a common 1 A current rating but differ in reverse voltage breakdown capabilities. This series ranges from 50 V (1N4933) to 600 V (1N4937). The 1N4934 specifically provides a 100 V rating, positioning it between lower voltage variants like the 1N4933 and higher voltage options like the 1N4935. It is commonly used in general-purpose rectification where moderate switching speeds are sufficient.

Replacement Considerations

Verified substitutes include 1N4933, 1N4935, 1N4936, and 1N4937, provided voltage ratings align with circuit requirements. Equivalent commercial part numbers may vary by manufacturer; always confirm pinout compatibility and electrical specifications against the original datasheet.