1N5249B-G

Single Zener Diodes Overview

The Comchip Technology 1N5249B-G is a unidirectional silicon Zener diode housed in a DO-35 glass axial leaded package. It provides a nominal Zener voltage of 20 V with a maximum dynamic impedance of 25 Ω at a test current of 5.2 mA. The device supports a maximum power dissipation of 500 mW and operates within a junction temperature range up to 175 °C. It features a maximum reverse leakage current of 0.1 μA at 30 V and exhibits a positive temperature coefficient of +0.086 %/K.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation through a unidirectional Zener breakdown mechanism.
• Utilizes a glass encapsulated DO-35 case for polarity indication via cathode band marking.
• Designed for thermal equilibrium operation with defined forward voltage characteristics.

Single Zener Diodes Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection for sensitive electronic components
• Clamping applications in signal processing paths

Single Zener Diodes Procurement Notes

Verify the specific part number against manufacturer datasheets to confirm compliance with RoHS standards and exact electrical tolerances. Ensure that the ordering suffix matches the required packaging configuration, as standard bulk or box quantities may vary by distributor. Confirm that the component meets the necessary thermal resistance requirements for the intended ambient operating conditions.

Single Zener Diodes Selection Notes

Select this component when a precise 20 V regulation point is required within a low-power axial leaded form factor. Consider the positive temperature coefficient for thermal stability analysis in high-temperature environments. Evaluate the maximum reverse leakage current specifications to ensure compatibility with high-impedance circuit nodes where minimal current draw is critical.

Single Zener Diodes Part Context

This component belongs to the 1N5221B-G through 1N5267B-G series of axial leaded glass Zener diodes manufactured by Comchip Technology. The series covers a wide voltage range from 2.4 V to 75 V, sharing common mechanical dimensions and maximum ratings such as 500 mW power dissipation and a DO-35 package style.

Single Zener Diodes Replacement Considerations

Cross-reference with other manufacturers offering 1N5249B equivalents in DO-35 packages. Verify that substitute parts maintain identical Zener voltage tolerance, power dissipation limits, and thermal resistance characteristics to ensure circuit performance parity.

Single Zener Diodes FAQ

What is the temperature coefficient for the 1N5249B-G?

The temperature coefficient is +0.086 %/K at the test current of 5.2 mA.

How is polarity indicated on the 1N5249B-G?

Polarity is indicated by a cathode band marked on the glass body.