1N5251A/TR

Single Zener Diodes Overview

The Microchip Technology 1N5251A/TR is a 0.5-watt glass axial-lead Zener diode housed in a DO-35 package. It provides a nominal Zener voltage of 22 V with a 10% tolerance, as indicated by the 'A' suffix. The device operates at a test current of 5.6 mA and exhibits a maximum Zener impedance of 29 Ohms at this current level. Maximum reverse leakage current is specified at 20 µA. The component features a positive temperature coefficient of +0.087 %/°C and supports an operating temperature range from -65°C to +175°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features minimal capacitance characteristics suitable for high-frequency applications
• Constructed with hermetically sealed glass axial-lead packaging

Single Zener Diodes Applications

• Voltage reference circuits
• Overvoltage protection systems
• General-purpose voltage regulation

Single Zener Diodes Procurement Notes

Verify that the TR suffix corresponds to tape and reel packaging per EIA-296 standards. Confirm the manufacturer origin, as historical data indicates Microsemi Scottsdale Division production for this series. Ensure compatibility with RoHS compliance requirements if applicable to the specific manufacturing lot.

Single Zener Diodes Selection Notes

Select this component when a 22 V regulation point is required within the 0.5-watt power dissipation class. The 10% tolerance offers a balance between cost and precision. Consider the positive temperature coefficient for thermal stability analysis in environments exceeding standard ambient conditions.

Single Zener Diodes Part Context

This part belongs to the extensive 1N5221 through 1N5281B series of 500 mW Zener Voltage Regulators. The series covers a wide voltage selection from 2.4 to 200 volts. The 'A' suffix specifically denotes a standard 10% voltage tolerance, distinguishing it from tighter tolerance variants like the B, C, or D suffixes.

Single Zener Diodes Replacement Considerations

Equivalent parts include other manufacturers' 1N5251A devices in the DO-35 package. Cross-reference with MLL5251A for surface mount MELF equivalents if board space constraints require a change in mounting style.