1N5246B

Single Zener Diodes Overview

The Fairchild Semiconductor 1N5246B is a single-channel general-purpose Zener diode designed for voltage regulation and reference applications. It features a nominal Zener voltage of 16 V with a tight tolerance of ±5%. The device supports a maximum power dissipation of 500 mW 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 17 Ohms, and a test current of 7.8 mA. It is available in through-hole DO-35 packages or surface-mount SOD-123 configurations.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation with a nominal 16 V breakdown point.
• Offers high thermal stability with an operating junction temperature up to 200 °C.
• Ensures precise voltage control with a standard ±5% tolerance rating.

Single Zener Diodes Applications

• General-purpose voltage regulation circuits
• Voltage reference sources in analog systems
• Overvoltage protection stages

Single Zener Diodes Procurement Notes

Verify the specific package type (DO-35 axial leaded or SOD-123 surface mount) as availability varies by manufacturer variant. Confirm RoHS compliance status and check for active production status directly with Fairchild or authorized distributors, as legacy part numbers may have limited stock or end-of-life implications requiring immediate validation before design finalization.

Single Zener Diodes Selection Notes

Select this component when a 16 V regulation point is required with moderate power handling capabilities. Ensure the circuit design accommodates the 500 mW power dissipation limit at the expected ambient temperature. Verify that the 17 Ohm dynamic impedance meets the noise and ripple requirements of the application. Consider the physical mounting constraints when choosing between through-hole and surface-mount variants.

Single Zener Diodes Part Context

This component belongs to the widely used 1N52xx series of Zener diodes, which are industry-standard parts for low-power voltage regulation. The 'B' suffix typically denotes the ±5% tolerance grade, distinguishing it from looser tolerance variants. Fairchild Semiconductor, now part of onsemi, produces this device alongside other manufacturers like Rectron and Vishay, ensuring broad ecosystem compatibility.

Single Zener Diodes Replacement Considerations

Compatible substitutes include the MMSZ5246B (SOD-123 package) and generic equivalents such as 1N5246B from Rectron or Vishay. When replacing, verify that the alternative matches the 16 V nominal voltage, 500 mW power rating, and ±5% tolerance. Ensure the replacement package fits the existing PCB footprint if switching between DO-35 and SMD types.