1N5237B

Single Zener Diodes Overview

The Fairchild Semiconductor 1N5237B is a single silicon Zener diode designed for voltage regulation applications. It features an 8.2 V nominal Zener voltage with a ±5% tolerance and a maximum power dissipation of 500 mW. The device utilizes a DO-35 axial through-hole package, measuring 4.56 mm in length and 1.91 mm in width. Key electrical parameters include a maximum reverse leakage current of 3 µA at 6.5 V, a Zener impedance of 8 Ohms, and a test current of 20 mA. It operates within a temperature range of -65°C to +200°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation with a nominal 8.2 V breakdown voltage.
• Constructed with a glass DO-35 axial leaded package for through-hole mounting.
• Capable of handling up to 500 mW of power dissipation.
• Maintains low reverse leakage current under specified conditions.

Single Zener Diodes Applications

• General purpose voltage reference circuits
• Overvoltage protection stages
• Clamping applications in signal processing

Single Zener Diodes Procurement Notes

Verify the manufacturer origin, as the 1N5237B designation is used by multiple vendors including onsemi and Vishay. Confirm that the specific batch matches the required DO-35 package dimensions and RoHS compliance status. Ensure the supplier provides official datasheets from Fairchild or authorized distributors to guarantee parameter accuracy regarding the 8.2 V tolerance and thermal ratings.

Single Zener Diodes Selection Notes

Select this component when a standard 8.2 V regulation point is required in a through-hole design. The DO-35 package offers robust mechanical stability compared to surface mount alternatives. Consider the 500 mW power rating and the specific Zener impedance of 8 Ohms for circuit stability. Verify compatibility with the operating temperature range of -65°C to +200°C for the intended environment.

Single Zener Diodes Part Context

The 1N5237B belongs to the widely recognized 1N52xx series of half-watt Zener diodes. This series is standardized across the semiconductor industry, allowing for cross-manufacturer substitution. Fairchild Semiconductor produced this variant using silicon planar technology, ensuring consistent performance characteristics aligned with JEDEC standards for general-purpose voltage regulation.

Single Zener Diodes Replacement Considerations

Equivalent parts include Vishay 1N5237B and onsemi 1N5237B. Both maintain identical 8.2 V specifications and DO-35 packaging. Verify pinout orientation and thermal derating curves before substitution.