1N5225A/TR

Single Zener Diodes Overview

The Microchip Technology 1N5225A/TR is a 0.5 W glass axial-lead Zener diode in the DO-35 package, offering a nominal voltage of 3.0 V with ±10% tolerance. It operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 29 μA at 2.7 V. The device exhibits a Zener impedance of 1600 Ω at 0.25 mA and a negative temperature coefficient of -0.075 %/°C. Designed for robust performance, it provides minimal capacitance and inherent radiation hardness.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features hermetically sealed glass axial-lead construction for durability
• Inherently radiation hard per MicroNote 050 specifications
• Minimal capacitance characteristics suitable for high-frequency applications

Single Zener Diodes Applications

• Voltage reference circuits requiring stable low-voltage regulation
• Overvoltage protection in sensitive electronic systems
• Clamping applications in signal processing paths
• Power supply regulation modules

Single Zener Diodes Procurement Notes

Verify the specific suffix 'TR' indicates tape and reel packaging compliant with EIA-296 standards. Confirm that the 'A' suffix denotes the required ±10% voltage tolerance. Ensure compatibility with RoHS requirements if applicable by checking for the 'e3' designation on the official datasheet. Validate lead length and mounting orientation against mechanical drawings before integration.

Single Zener Diodes Selection Notes

Select this component when a precise 3.0 V regulation point is needed with moderate tolerance. Consider the negative temperature coefficient for thermal compensation strategies. Evaluate the high Zener impedance for noise sensitivity in the target circuit. Compare power derating curves against expected ambient temperatures to ensure safe operation within the 0.5 W limit.

Single Zener Diodes Part Context

This part belongs to the widely used 1N5221 through 1N5281B series of 0.5 W Zener diodes. The series covers a voltage range from 2.4 V to 200 V in standard DO-35 packages. Variants include different tolerance suffixes (A, B, C, D) and military screening options. The 1N5225A specifically targets the lower end of the voltage spectrum for precision regulation tasks.

Single Zener Diodes Replacement Considerations

Direct equivalents include other manufacturers' 1N5225A parts meeting JEDEC registration standards. Surface mount alternatives exist in the MLL5221 to MLL5281B MELF series. Verify pinout compatibility and thermal resistance characteristics when substituting with DO-7 or other axial packages.

Single Zener Diodes FAQ

What is the temperature coefficient for the 1N5225A?

The 1N5225A has a negative temperature coefficient of -0.075 %/°C.

How is the polarity indicated on the device?

Polarity is indicated by a band on the glass body; the cathode is at the banded end.

What does the 'TR' suffix signify?

The 'TR' suffix indicates that the device is supplied in tape and reel packaging per EIA-296 standards.