1N5281A

Single Zener Diodes Overview

The Microchip Technology 1N5281A is a 0.5-watt glass axial-lead Zener diode housed in a DO-35 package. It provides a nominal Zener voltage of 200 volts with a standard tolerance of plus or minus 10 percent, indicated by the 'A' suffix. The device operates within a temperature range of -65°C to +175°C and features minimal capacitance. Electrical characteristics include a maximum reverse current of 2500 µA at 190 volts and a maximum Zener impedance of 7000 ohms at a test current of 0.65 mA.

Single Zener Diodes Feature Summary

• Hermetically sealed glass axial-lead construction for durability
• 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 aerospace and defense systems
• Overvoltage protection circuits
• Reference voltage sources in harsh environments

Single Zener Diodes Procurement Notes

Verify the specific suffix requirements against the datasheet to ensure correct tolerance and screening levels. Confirm that the DO-35 package dimensions align with the target PCB layout. Check for RoHS compliance status if lead-free soldering processes are mandated. Ensure the manufacturer source is verified as Microsemi or authorized distributor.

Single Zener Diodes Selection Notes

Select this component when a 200-volt Zener reference is required in a small axial-lead package. The 10 percent tolerance suits general regulation tasks where tighter precision is not critical. Consider the high thermal resistance and power derating curves for proper heat dissipation design in enclosed spaces.

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. The 1N5281 variant represents the highest voltage point in this specific JEDEC registered lineup, providing a stable breakdown voltage for high-voltage clamping applications.

Single Zener Diodes Replacement Considerations

Equivalent parts include other manufacturers' 1N5281A variants meeting the same JEDEC specifications. Surface mount equivalents like MLL5281B are available in MELF packages. Military screened versions may require specific prefixes such as MX or MV.