1N5245B

Single Zener Diodes Overview

The Fairchild Semiconductor 1N5245B is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 15 V with a tolerance of ±5%. The device operates in a DO-35 (DO-204AH) axial leaded glass package, suitable for through-hole mounting. It has a maximum power dissipation of 500 mW and a test current of 8.5 mA. The component supports a wide operating temperature range from -65 °C to +200 °C junction temperature, ensuring reliability in demanding environments.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation at a nominal 15 V level
• Utilizes a hermetically sealed glass axial-lead construction
• Supports high junction temperatures up to 200 °C

Single Zener Diodes Applications

• Voltage reference circuits
• Overvoltage protection
• General-purpose voltage regulation

Single Zener Diodes Procurement Notes

Verify the manufacturer origin carefully, as the 1N5245B designation is widely produced by multiple vendors including onsemi, Microchip, and Microsemi. Confirm that the specific batch meets required quality standards if military or aerospace screening levels are necessary, as standard commercial grades differ from screened variants. Ensure the package type matches the intended PCB footprint.

Single Zener Diodes Selection Notes

Select this component when a standard 15 V regulation point is required in a through-hole design. The 500 mW power rating dictates thermal management considerations for the circuit layout. Verify that the 5% tolerance aligns with the system's voltage accuracy requirements. Consider the DO-35 package dimensions for mechanical clearance constraints within the assembly.

Single Zener Diodes Part Context

This part belongs to the popular 1N5221 through 1N5281B series of 0.5 W Zener Voltage Regulators. The series offers a broad selection of voltages ranging from 2.4 V to 200 V in standard 5% or 10% tolerances. These glass axial-leaded DO-35 Zeners are established components used across various industrial and consumer electronics applications requiring reliable voltage clamping.

Single Zener Diodes Replacement Considerations

Equivalent parts include the MMSZ5245B for surface mount implementations and other manufacturers' 1N5245B variants such as those from onsemi or Microchip. Cross-referencing electrical parameters like impedance and leakage current is recommended before substitution.