1N5227A (DO-35)

Single Zener Diodes Overview

The Microsemi Corporation 1N5227A is a Zener diode from the 1N5221 through 1N5281B series, housed in a hermetically sealed glass DO-35 (DO-204AH) axial-lead package. It provides a nominal Zener voltage of 3.6 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 dissipates up to 0.5 watts at 25°C. Electrical characteristics include a maximum reverse current of 24 µA at 24 V and a Zener impedance of 1700 ohms at a test current of 20 mA.

Single Zener Diodes Feature Summary

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

Single Zener Diodes Applications

• Voltage regulation in electronic circuits
• Reference voltage sources
• Overvoltage protection

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix against the datasheet to confirm tolerance and screening levels. Standard commercial versions use the base part number or an 'A' suffix for 10% tolerance. Military screening options require specific prefixes like MQ, MX, MV, or MSP combined with a '-1' suffix. Confirm RoHS compliance status if required, as it depends on the presence of the 'e3' suffix.

Single Zener Diodes Selection Notes

Select this component when a stable reference voltage near 3.6 V is needed in a ruggedized environment. The DO-35 package supports through-hole mounting. Ensure the circuit design accounts for the specified thermal resistance and power derating curves to maintain operation within the 0.5-watt limit. Verify that the required tolerance aligns with the available suffix options.

Single Zener Diodes Part Context

This device belongs to the popular 1N5221 through 1N5281B series of 0.5-watt Zener Voltage Regulators manufactured by Microsemi's Scottsdale Division. The series offers a wide selection of voltages ranging from 2.4 to 200 volts. These components are JEDEC registered and designed for reliable performance in various industrial and military applications requiring precise voltage control.

Single Zener Diodes Replacement Considerations

Equivalent parts include the Microchip Technology 1N5227A and the Microsemi/Microchip MSP1N5227A-1. Other variants such as MQ1N5227BTR-1 offer different tolerances or packaging formats.