UDZ4V3B-7

Single Zener Diodes Overview

The UDZ4V3B-7 is a surface mount precision Zener diode manufactured by Diodes Incorporated, housed in an SOD323 package. It provides a nominal Zener voltage of 4.3 V with a tight tolerance range of 4.170 V to 4.430 V at a test current (IZT) of 5 mA. The device features a maximum Zener impedance (ZZT) of 100 Ω and a maximum reverse leakage current (IR) of 1.0 µA at VR = 5 V. It supports a power dissipation of 200 mW and operates within a temperature range of -65 °C to +150 °C.

Single Zener Diodes Feature Summary

• Very sharp breakdown characteristics for stable voltage regulation
• Very tight tolerance on Zener breakdown voltage
• Ideally suited for automated assembly processes

Single Zener Diodes Applications

• Voltage reference circuits
• Over-voltage protection
• Clamping applications

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix '-7' corresponds to the 3,000 units per tape and reel packaging format. Confirm that the component meets RoHS compliance and is halogen-free as specified in the datasheet notes. Ensure the procurement channel is authorized to avoid counterfeit risks associated with unauthorized sales channels.

Single Zener Diodes Selection Notes

Select this component when precise voltage regulation is required in space-constrained designs utilizing the SOD323 footprint. Consider the 100 Ω impedance limit and 200 mW thermal dissipation capability during circuit design. Verify compatibility with automated pick-and-place equipment due to the surface mount configuration.

Single Zener Diodes Part Context

This part belongs to the UDZ3V6B through UDZ15B series of surface mount precision Zener diodes from Diodes Incorporated. The series offers various voltage options within the same compact SOD323 package family, allowing for consistent manufacturing processes across different voltage requirements.

Single Zener Diodes Replacement Considerations

Direct substitutes include other UDZ4V3B variants from Diodes Incorporated or equivalent SOD323 Zener diodes with matching 4.3 V nominal voltage, ±5% tolerance, and similar electrical characteristics.

Single Zener Diodes FAQ

What is the marking code for the UDZ4V3B?

The marking code for the UDZ4V3B is B9.

Is the UDZ4V3B AEC-Q101 qualified?

No, the datasheet indicates that only specific devices like the UDZ3V6B, UDZ3V9B, UDZ4V3B, UDZ4V7B, and UDZ7V5B are AEC-Q101 qualified.