1N5255A

Single Zener Diodes Overview

The Microchip Technology 1N5255A is a single Zener diode housed in a DO-35 glass axial-lead package. It provides a nominal Zener voltage of 28 V with a 10% tolerance (suffix A). The device dissipates up to 500 mW at 25°C and operates within a temperature range of -65°C to +200°C. Key electrical parameters include a maximum reverse leakage current of 100 nA, a Zener impedance of 44 Ohms at the test current of 4.5 mA, and a positive voltage temperature coefficient of 0.091 %/°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole integration
• Constructed with a hermetically sealed glass body for environmental protection
• Inherently radiation hard per MicroNote 050

Single Zener Diodes Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in electronic systems
• General-purpose voltage regulation tasks

Single Zener Diodes Procurement Notes

Verify the specific suffix letter against the datasheet to confirm the required voltage tolerance level. Ensure the selected variant matches the necessary screening requirements, as military screening options are available via specific prefixes. Confirm that the standard DO-35 package dimensions align with the target PCB layout constraints before finalizing the order.

Single Zener Diodes Selection Notes

Select this component when a 28 V regulation point is required with moderate precision. The 10% tolerance suits applications where tighter limits are unnecessary. Consider the positive temperature coefficient for thermal stability analysis. Verify that the 500 mW power dissipation rating accommodates the expected load current without exceeding thermal limits under worst-case ambient conditions.

Single Zener Diodes Part Context

This part belongs to the 1N5221 through 1N5281B series of 0.5 W Zener Voltage Regulators. The series offers a wide selection of voltages from 2.4 V to 200 V. Variants are available with different tolerance suffixes and optional internal bonds or military screening prefixes.

Single Zener Diodes Replacement Considerations

Equivalent parts include the MX1N5255A-1E3TR and 1N5255A(DO7). Verify package compatibility and tolerance specifications when substituting.