BZX84C4V3LT1

Single Zener Diodes Overview

The BZX84C4V3LT1G is a single Zener voltage regulator diode manufactured by onsemi, housed in an SOT-23 surface-mount package. It provides a nominal Zener voltage of 4.3 V with a standard tolerance range of 4.0 V to 4.6 V at a test current of 5 mA. The device features a maximum reverse leakage current of 3 µA and a typical capacitance of 450 pF. It operates within a junction temperature range of -65 °C to +150 °C and offers a power dissipation rating of 225 mW on FR-4 or FR-5 boards.

Single Zener Diodes Feature Summary

• Designed for voltage regulation in space-constrained applications such as cellular phones and handheld portables.
• Optimized for automated board assembly using the compact SOT-23 plastic package.
• Provides high electrostatic discharge (ESD) protection rated at Class 3 (>16 kV) per the human body model.

Single Zener Diodes Applications

• Cellular phones
• Handheld portable devices
• High density PC boards

Single Zener Diodes Procurement Notes

Verify that the ordering suffix matches the required packaging configuration. The 'T1' suffix indicates an 8 mm, 7 inch reel, while 'T3' denotes an 8 mm, 13 inch reel. Confirm whether the 'G' suffix is required for lead-free compliance. Ensure the specific part number aligns with the desired tolerance series and package type before procurement.

Single Zener Diodes Selection Notes

Select this component when a 4.3 V reference is needed in a small form factor. The standard tolerance series suits general-purpose regulation where tighter precision is not critical. Consider thermal derating if operating above 25°C ambient temperature. Verify pinout compatibility with existing PCB footprints, noting Pin 2 is unconnected.

Single Zener Diodes Part Context

This device belongs to the BZX84CxxxLT1 series of Zener voltage regulators from onsemi. The series covers a breakdown voltage range from 2.4 V to 75 V in the SOT-23 package. It serves as a surface-mount alternative to through-hole regulators, enabling higher component density on printed circuit boards while maintaining reliable voltage clamping and regulation functions.

Single Zener Diodes Replacement Considerations

BZX84C4V3LY is listed as a replacement with the same pinout and package.

Single Zener Diodes FAQ

What is the function of Pin 2 on the BZX84C4V3LT1?

Pin 2 is designated as No Connection and is electrically isolated from the internal diode structure.

How does the 'G' suffix affect the BZX84C4V3LT1?

The 'G' suffix indicates that the device is supplied in a lead-free package compliant with RoHS standards.