1N975B

Single Zener Diodes Overview

The onsemi 1N975B is a single silicon Zener diode housed in a DO-35 glass axial-leaded package. It provides a nominal Zener voltage of 39 V with a tolerance of ±5%. The device operates at a test current of 3.2 mA and handles a maximum power dissipation of 500 mW. Key electrical characteristics include a Zener impedance of 80 Ω, a reverse leakage current of 5 μA, and a forward voltage of 1.1 V. The component supports an operating and storage temperature range from -65°C to +200°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass DO-35 package for environmental protection
• Single unidirectional Zener configuration
• Wide thermal operating range suitable for harsh environments

Single Zener Diodes Applications

• Voltage regulation circuits
• Reference voltage sources
• Overvoltage protection

Single Zener Diodes Procurement Notes

Verify the manufacturer origin, as this part number was originally produced by Fairchild Semiconductor, which has undergone corporate restructuring. Confirm that the specific supplier source aligns with your quality requirements and traceability standards before procurement.

Single Zener Diodes Selection Notes

Select this component when a standard 39 V reference is required in a through-hole axial package. Ensure the circuit design accommodates the 500 mW power limit and the 80 Ω dynamic impedance at the intended operating current.

Single Zener Diodes Part Context

This component belongs to the 1N957B through 1N979B series of Zener diodes manufactured by Fairchild Semiconductor (now part of onsemi). These devices are designed for general-purpose voltage regulation applications requiring reliable performance in a compact axial leaded form factor.

Single Zener Diodes Replacement Considerations

Equivalent parts within the same series include the 1N974B and 1N976B. Cross-manufacturer equivalents may be considered if they match the 39 V nominal voltage, ±5% tolerance, and 500 mW power rating specifications.

Single Zener Diodes FAQ

What is the maximum power dissipation rating?

The maximum power dissipation is 500 mW at a lead temperature of 75°C or less.

What is the Zener impedance value?

The Zener impedance (ZZ) is specified as 80 Ω at a test current of 3.2 mA.