1N5229BTR

Single Zener Diodes Overview

The 1N5229BTR is a single silicon Zener diode manufactured by Fairchild Semiconductor, designed for through-hole mounting in the DO-35 axial glass package. It features a nominal Zener voltage of 4.3 V with a tolerance of ±5% and a maximum power dissipation of 500 mW. The device operates within a temperature range of -65°C to +200°C junction temperature, ensuring stability under varying thermal conditions. Key electrical characteristics include a test current of 20 mA, a maximum reverse leakage current of 5 µA, and a Zener impedance of 22 Ohms at the specified test current.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation via avalanche breakdown in a compact axial glass package
• Engineered for high-temperature operation up to 200°C junction temperature
• Features low reverse leakage current for efficient standby performance

Single Zener Diodes Applications

• Voltage reference circuits requiring precise 4.3 V levels
• Overvoltage protection stages in sensitive electronic systems
• General-purpose clipping and clamping applications

Single Zener Diodes Procurement Notes

Verify the manufacturer origin, as Fairchild Semiconductor operations have been integrated into ON Semiconductor. Confirm that the specific part number suffix corresponds to the intended packaging format and RoHS compliance status required for your assembly process. Cross-reference datasheets from both entities to ensure parameter consistency before finalizing procurement orders.

Single Zener Diodes Selection Notes

Select this component when a standard 4.3 V reference is needed in a through-hole configuration. Ensure the circuit design accommodates the 500 mW power dissipation limit and the 22 Ohm dynamic impedance. Verify that the operating environment stays within the specified -65°C to +200°C junction temperature range to maintain voltage accuracy and device reliability.

Single Zener Diodes Part Context

This component belongs to the widely used 1N52xx series of small-signal Zener diodes. These devices are standardized across multiple manufacturers, offering interchangeable pinouts and similar electrical profiles. The 1N5229B variant specifically targets the 4.3 V segment, providing a common reference point for biasing transistors and regulating low-voltage logic supplies in analog and digital mixed-signal designs.