BZX79-B39,143

Single Zener Diodes Overview

The BZX79-B39,143 is a single Zener diode manufactured by Nexperia USA Inc., designed for through-hole mounting in the DO-35-2 (ALF2) axial leaded package. It features a nominal Zener voltage of 39 V with a tight tolerance of ±2%. The device supports a maximum power dissipation of 500 mW and operates within an extended temperature range from -65 °C to +200 °C. Key electrical characteristics include a maximum reverse leakage current of 50 nA, a Zener impedance of 130 Ohms, and a forward voltage of 900 mV. It is supplied in an Ammo Pack configuration.

Single Zener Diodes Feature Summary

• Provides precise voltage regulation with a narrow ±2% tolerance band for stable reference applications.
• Engineered for high thermal resilience with a maximum operating junction temperature of +200 °C.
• Utilizes a robust axial leaded package suitable for standard through-hole PCB assembly processes.

Single Zener Diodes Applications

• Precision voltage reference circuits requiring low drift
• Over-voltage protection stages in industrial control systems
• Clamping applications in general-purpose electronic equipment

Single Zener Diodes Procurement Notes

Verify the specific suffix

Single Zener Diodes Selection Notes

Select this component when a stable 39 V reference is required with high precision. The ±2% tolerance distinguishes it from standard 5% variants. Ensure the circuit design accommodates the 500 mW power rating and the specific thermal requirements of the DO-35 package. Confirm that the through-hole form factor aligns with the target PCB layout constraints.

Single Zener Diodes Part Context

This part belongs to the BZX79 series of Zener diodes from Nexperia. The series offers various voltage options in a standardized axial package. The 'B' suffix indicates the tighter ±2% voltage tolerance compared to the 'C' series which typically offers ±5%. This specific model targets applications demanding higher accuracy than standard general-purpose diodes provide.

Single Zener Diodes Replacement Considerations

Cross-reference with other manufacturers offering DO-35 packaged Zener diodes rated at 39 V with ±2% tolerance. Verify that substitute parts match the 500 mW power dissipation and the +200 °C maximum operating temperature limits to ensure equivalent performance in existing designs.