1N5281B

Single Zener Diodes Overview

The Microchip Technology 1N5281B is a 0.5-watt glass axial-lead Zener diode housed in a DO-35 (DO-204AH) package. It provides a nominal Zener voltage of 200 volts with a standard tolerance of ±5%, indicated by the 'B' suffix. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 10 µA at 144 volts. Electrical characteristics include a test current of 2.5 mA, a maximum Zener impedance of 7000 ohms at 0.25 mA, and a positive temperature coefficient of +0.110 %/°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass axial-lead construction for reliable operation
• Regulates voltage across a broad operating current and temperature range
• Inherently radiation hard per MicroNote 050
• Minimal capacitance suitable for high-frequency applications

Single Zener Diodes Applications

• Voltage regulation in power supply circuits
• Overvoltage protection for sensitive electronic components
• Reference voltage sources in measurement equipment

Single Zener Diodes Procurement Notes

Verify the specific suffix requirements against the datasheet before ordering. Confirm that the selected variant meets the necessary military screening levels if applicable. Ensure the procurement documentation matches the JEDEC registered type number and electrical parameters listed in the official specifications.

Single Zener Diodes Selection Notes

Select this component when a 200-volt Zener reference is required in a compact axial-lead package. Consider the thermal resistance and derating curves for high-power dissipation scenarios. Evaluate the tight tolerance options if stricter voltage accuracy is needed compared to the standard B suffix.

Single Zener Diodes Part Context

This part belongs to the popular 1N5221 through 1N5281B series of 0.5-watt Zener Voltage Regulators. The series offers a wide selection from 2.4 to 200 volts with various tolerance options. These devices are widely used as standard voltage references in general-purpose electronics.

Single Zener Diodes Replacement Considerations

Surface mount equivalents are available in the MLL5221 to MLL5281B series using the DO-213AA MELF style package. Other variants within the same series offer different voltage ratings or tighter tolerances.