1N5250A/TR

Single Zener Diodes Overview

The Microchip Technology 1N5250A/TR is a 500 mW glass axial-lead Zener diode in the JEDEC registered 1N5221 to 1N5281B series. It provides a nominal Zener voltage of 20 V with a standard tolerance of ±10%, indicated by the 'A' suffix. The device operates within a temperature range of -65°C to +175°C and features a hermetically sealed DO-35 (DO-204AH) package. Electrical characteristics include a maximum reverse current of 100 µA at 20 V, a Zener impedance of 14 Ohms at IZK = 0.25 mA, and a positive voltage temperature coefficient of +0.086 %/°C. The '/TR' suffix denotes tape and reel packaging compliant with EIA-296 standards.

Single Zener Diodes Feature Summary

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

Single Zener Diodes Applications

• Voltage regulation circuits requiring stable reference voltages
• Overvoltage protection in electronic systems
• Clamping applications in signal processing paths

Single Zener Diodes Procurement Notes

Verify that the ordering suffix matches the required specifications. The '/TR' suffix indicates tape and reel packaging; confirm this aligns with automated assembly requirements. Ensure the 'A' suffix corresponds to the necessary ±10% voltage tolerance. Cross-reference the manufacturer's datasheet for specific screening levels or military prefixes if environmental ruggedness is required.

Single Zener Diodes Selection Notes

Select this component when a 20 V reference with ±10% tolerance is needed in a DO-35 package. Consider the positive temperature coefficient (+0.086 %/°C) for thermal stability analysis. Verify power dissipation limits against ambient temperature using derating curves. Confirm that the axial lead form factor fits the PCB layout constraints.

Single Zener Diodes Part Context

This part belongs to the extensive 1N5221 through 1N5281B series of 0.5 W Zener regulators. The series offers a wide selection from 2.4 V to 200 V. Variations exist in voltage tolerances (A, B, C, D suffixes) and screening levels (MQ, MX, MV prefixes). Surface mount equivalents are available in the MLL5221 to MLL5281B series.

Single Zener Diodes Replacement Considerations

Direct substitutes include other manufacturers' 1N5250A parts meeting JEDEC specifications. For surface mount needs, consider the MLL5250 series equivalents. Verify pinout compatibility and thermal resistance values when replacing with non-JEDEC registered variants.