1N5278B-1

Single Zener Diodes Overview

The Microchip Technology 1N5278B-1 is a single Zener diode voltage regulator designed for through-hole mounting in the DO-35 (DO-204AH) axial package. It features a nominal Zener voltage of 170 V with a tolerance of ±5%. The device supports 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 1900 Ohms, and a forward voltage of 1.5 V at 200 mA.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation at 170 V for circuit protection and reference applications
• Capable of handling high operating temperatures up to 200°C for robust performance
• Utilizes a standard through-hole DO-35 axial leaded package for easy integration

Single Zener Diodes Applications

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

Single Zener Diodes Procurement Notes

Verify the specific suffix '-1' against official Microchip documentation to confirm exact mechanical and electrical specifications, as suffixes can indicate variations in packaging or testing criteria. Ensure compatibility with existing board layouts requiring DO-35 axial components. Cross-reference datasheets from authorized distributors to validate current availability and manufacturing status before procurement.

Single Zener Diodes Selection Notes

Select this component when a precise 170 V regulation point is required with moderate power handling capabilities. The wide operating temperature range makes it suitable for demanding environments. Consider the high Zener impedance value when designing for low-noise applications, as it may impact regulation accuracy under varying load conditions compared to lower impedance alternatives.

Single Zener Diodes Part Context

This part belongs to the 1N52xx series of Zener diodes manufactured by Microchip Technology. These components are widely used in general-purpose electronics for voltage clamping and regulation. The 1N5278B-1 specifically targets higher voltage applications within this family, offering reliability in industrial and commercial equipment where stable DC voltage levels are critical for proper system operation.

Single Zener Diodes Replacement Considerations

Equivalent parts from other manufacturers such as Fairchild Semiconductor exist under the same 1N5278B designation. Verify pinout compatibility and thermal resistance parameters when substituting. Ensure that alternative sources meet the same ±5% voltage tolerance and 500 mW power rating requirements.