1N5256B

Single Zener Diodes Overview

The SMC Diode Solutions 1N5256B is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 30 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 500 mW and operates within a temperature range of -65°C to +200°C. Key electrical characteristics include a maximum reverse leakage current of 100 nA, a Zener impedance of 49 Ohms at a test current of 4.2 mA, and a forward voltage of 1.1 V. The component utilizes a DO-7 axial through-hole package.

Single Zener Diodes Feature Summary

• Hermetically sealed glass construction for environmental stability
• High thermal stability supporting extended operating temperatures up to 200°C
• Low leakage current characteristics for precise voltage reference applications

Single Zener Diodes Applications

• Voltage regulation in electronic circuits
• Overvoltage protection systems
• Reference voltage generation

Single Zener Diodes Procurement Notes

Verify the specific manufacturer designation when sourcing, as the 1N5256B is a standardized JEDEC part number produced by multiple vendors including Microchip, Vishay, and Taiwan Semiconductor. Confirm that the supplier provides documentation from an authorized source to ensure compliance with specified electrical tolerances and hermetic sealing standards required for critical applications.

Single Zener Diodes Selection Notes

Select this component for designs requiring a stable 30 V reference in through-hole layouts. Ensure the circuit can accommodate the 500 mW power dissipation limit under worst-case thermal conditions. Verify that the DO-7 package dimensions align with the PCB footprint requirements and that the high maximum junction temperature capability meets the operational environment specifications.

Single Zener Diodes Part Context

The 1N5256B belongs to the standard 1N52xx series of hermetically sealed glass Zener diodes. This series is widely utilized in industrial and military-grade electronics due to its robust construction and reliable performance over wide temperature ranges. The 'B' suffix typically denotes a tighter voltage tolerance compared to non-suffixed variants.

Single Zener Diodes Replacement Considerations

Direct substitutes include the Vishay 1N5256B and Taiwan Semiconductor 1N5256B. These parts share identical electrical parameters and mechanical form factors, allowing for pin-compatible replacement without circuit modification.