1N959B

Single Zener Diodes Overview

The Fairchild Semiconductor 1N959B is a silicon unidirectional Zener diode housed in the DO-35 axial glass package. It provides a nominal regulated voltage of 7.5 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 0.5 W (500 mW) and features a maximum dynamic impedance of 24 Ω. It supports a maximum junction operating temperature of 175 °C and a storage temperature range from -65 °C to +200 °C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation via Zener breakdown characteristics
• Utilizes an isolated glass encapsulation for environmental protection
• Designed for through-hole mounting on printed circuit boards

Single Zener Diodes Applications

• General voltage regulation circuits
• Voltage reference applications
• Over-voltage protection stages

Single Zener Diodes Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm compliance with RoHS directives if required by the design. Ensure the DO-35 package dimensions match the PCB footprint requirements. Validate that the 7.5 V Zener voltage falls within the acceptable tolerance limits for the specific application circuit.

Single Zener Diodes Selection Notes

Select this component when a 7.5 V reference is required in a standard axial leaded package. Consider the 500 mW power rating to ensure adequate thermal headroom under continuous operation. Verify that the 24 Ω dynamic impedance meets the noise and stability requirements of the load. Compare against other series members like the 1N958B or 1N960B if different voltage levels are needed.

Single Zener Diodes Part Context

This part belongs to the 1N957B through 1N979B series of half-watt Zener diodes manufactured by Fairchild Semiconductor. These components share common packaging and thermal characteristics but vary in their nominal Zener voltages. The series is designed for general-purpose discrete semiconductor applications requiring reliable voltage clamping or referencing in through-hole assemblies.