BZX85C4V3

Single Zener Diodes Overview

The onsemi BZX85C4V3 is a single-channel silicon Zener diode housed in a DO-41 glass axial leaded package. It provides a nominal voltage regulation of 4.3 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1.0 W at 25°C ambient temperature, increasing to 1.3 W when mounted with leads extending 4 mm from the package. Electrical characteristics include a test current of 50 mA, a maximum Zener impedance of 13 Ω, and a leakage current not exceeding 3 µA at 1 V reverse bias. The component operates within a junction and storage temperature range of -65 °C to +200 °C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation using a silicon epitaxial planar structure.
• Features a robust glass axial leaded package designed for through-hole mounting.
• Capable of high thermal stability with an extended operating temperature range up to +200 °C.

Single Zener Diodes Applications

• Voltage reference circuits requiring precise low-voltage regulation.
• Overvoltage protection stages in electronic systems.
• Clamping applications for transient voltage suppression.

Single Zener Diodes Procurement Notes

Verify the specific manufacturer source, as the BZX85C4V3 designation is utilized by multiple semiconductor producers including Magnatec, Taiwan Semiconductor, and Vishay. Confirm that the ordered unit matches the exact electrical parameters and physical dimensions required for your design, particularly regarding the package style and voltage tolerance specifications.

Single Zener Diodes Selection Notes

Select this component for designs requiring a 4.3 V regulation point in a standard through-hole configuration. Ensure the circuit can accommodate the specified 50 mA test current and that the thermal management strategy accounts for the derating factor above 50°C. Verify compatibility with the DO-41 footprint during the PCB layout phase.

Single Zener Diodes Part Context

This part belongs to the BZX85C series of Zener diodes manufactured by onsemi. The series covers a wide voltage range from 3.3 V to 56 V, all sharing the same DO-41 glass package form factor. This specific model represents the lower end of the voltage spectrum within the family, optimized for low-voltage reference and protection tasks.

Single Zener Diodes Replacement Considerations

Direct substitutes include the BZX85C4V3 variants produced by other manufacturers such as Vishay or Taiwan Semiconductor, provided they meet the identical 4.3 V nominal voltage and DO-41 package constraints.

Single Zener Diodes FAQ

What is the maximum power dissipation rating?

The maximum power dissipation is 1.0 W at an ambient temperature of 25°C. It increases to 1.3 W if the leads are extended 4 mm from the glass package.

What is the Zener impedance at the test current?

The maximum Zener impedance (ZZ) is 13 Ω when measured at a test current (IZ) of 50 mA.