1N5243A

Single Zener Diodes Overview

The Microchip Technology 1N5243A is a 0.5 W glass axial-lead Zener diode in the DO-35 package. It provides a nominal Zener voltage of 13 V with a ±10% tolerance, indicated by the 'A' suffix. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 10 µA at 9.9 V. Electrical characteristics include a test current of 9.5 mA, a maximum Zener impedance of 13 Ohms at 0.25 mA, and a positive voltage temperature coefficient of +0.079 %/°C.

Single Zener Diodes Feature Summary

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

Single Zener Diodes Applications

• Voltage reference circuits
• Overvoltage protection
• Power supply regulation

Single Zener Diodes Procurement Notes

Verify the specific suffix requirements against design specifications, as the 'A' suffix denotes a 10% tolerance distinct from other available options. Confirm that the standard lead length meets thermal resistance calculations if derating is required. Ensure compatibility with RoHS compliance needs, noting that non-compliant versions exist without the 'e3' suffix.

Single Zener Diodes Selection Notes

Select this component when a 13 V Zener voltage with moderate precision is required in a through-hole configuration. Consider the positive temperature coefficient for thermal stability analysis. Evaluate the power dissipation limits relative to ambient temperatures using the provided derating curve to ensure reliable operation under steady-state conditions.

Single Zener Diodes Part Context

This part belongs to the 1N5221 through 1N5281B series of 0.5 W Zener Voltage Regulators manufactured by Microsemi (now Microchip Technology). The series offers a wide selection of voltages from 2.4 V to 200 V in the standard DO-35 glass axial-lead package. Variants are available with different tolerances and military screening levels.

Single Zener Diodes Replacement Considerations

Equivalent parts include 1N5243B for tighter 5% tolerance or 1N5243C/D for 2%/1% tolerance. Surface mount equivalents are available in the MLL5281B MELF package. Verify pinout and thermal characteristics when substituting with generic JEDEC registered types.

Single Zener Diodes FAQ

What does the 'A' suffix indicate for the 1N5243A?

The 'A' suffix indicates a standard voltage tolerance of plus or minus 10%.

Is the 1N5243A sensitive to electrostatic discharge?

No, the device is nonsensitive to ESD, tested per MIL-STD-750 Method 1020.