1N5221BDO35

Single Zener Diodes Overview

The Microsemi Corporation 1N5221BDO35 is a Zener diode with a nominal voltage of 2.4V and a power dissipation rating of 0.5W at 25°C. It utilizes a hermetically sealed glass DO-35 (DO-204AH) axial-lead package. The device features a standard tolerance of ±5%, indicated by the 'B' suffix, and operates within a temperature range of -65°C to +175°C. Electrical characteristics include a maximum reverse current of 20μA at 2.0V and a zener impedance of 1200 Ohms at a test current of 30mA.

Single Zener Diodes Feature Summary

• Hermetically sealed glass axial-lead construction for environmental stability
• JEDEC registered part number ensuring standardized electrical parameters
• Inherently radiation hard per MicroNote 050 specifications
• Minimal capacitance suitable for high-frequency applications

Single Zener Diodes Applications

• Voltage regulation in broad operating current ranges
• Reference voltage sources in precision circuits
• Overvoltage protection for sensitive semiconductor components

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required tolerance level, as the 'B' designation confirms a ±5% voltage tolerance. Confirm RoHS compliance status if lead-free soldering processes are mandated, noting that non-compliant variants may utilize tin-lead finishes. Ensure the procurement specification explicitly requires the DO-35 axial-lead package format rather than surface mount equivalents.

Single Zener Diodes Selection Notes

Select this component when a low nominal breakdown voltage near 2.4V is required with tight manufacturing tolerances. The DO-35 package provides flexibility for manual or automated through-hole mounting. Consider the negative temperature coefficient inherent to voltages below 5V during thermal design. Verify that the application current remains within the specified test conditions to maintain accuracy.

Single Zener Diodes Part Context

This device belongs to the widely utilized 1N5221 through 1N5281B series of 0.5-watt Zener regulators. The series covers a voltage selection from 2.4 to 200 volts. The 1N5221B represents the lowest voltage option in this standard JEDEC lineup, offering a robust solution for low-voltage reference and clamping tasks in general-purpose electronics.

Single Zener Diodes Replacement Considerations

Direct functional equivalents include other manufacturers' 1N5221B parts adhering to JEDEC standards. Surface mount replacements are available in the MLL5221 series using the DO-213AA MELF package. Military screening levels can be obtained via prefixes such as MQ, MX, MV, or MSP on compatible variants.