1N4621 BK PBFREE

Single Zener Diodes Overview

The Central Semiconductor Corp 1N4621 BK PBFREE is a silicon Zener diode designed for low leakage, low current, and low noise applications. It operates within the 1N4614 through 1N4627 series, featuring a nominal Zener voltage of 3.6 V with a 5% tolerance range from 3.420 V to 3.780 V. The device dissipates up to 250 mW at 25°C and withstands junction temperatures between -65°C and +200°C. Electrical characteristics include a maximum reverse current of 2.0 µA at 2.0 V, a maximum Zener impedance of 7.5 Ω at the test current of 250 µA, and a noise density of 1.0 µV/√Hz at 250 µA.

Single Zener Diodes Feature Summary

• Engineered for low leakage and low noise performance suitable for sensitive circuits
• Provides stable voltage regulation within a tight 5% tolerance band
• Capable of operating across an extended temperature range from -65°C to +200°C

Single Zener Diodes Applications

• Low noise voltage reference circuits
• Precision low current regulation applications
• Sensitive analog signal conditioning stages

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix requirements when sourcing this component. The datasheet indicates that adding the suffix PBFREE ensures lead-free plating compliance, while TIN/LEAD requests require explicit notation. Confirm package availability and manufacturer lot codes upon order placement to ensure alignment with project specifications and environmental regulations.

Single Zener Diodes Selection Notes

Select this component when circuit design demands minimal noise generation alongside precise low-voltage regulation. The 3.6 V nominal rating fits specific reference needs within the 1.8 V to 6.2 V series range. Ensure the application current remains near the specified 250 µA test point to maintain accuracy, as impedance and voltage drift may occur at significantly higher or lower bias currents.

Single Zener Diodes Part Context

This part belongs to the 1N4614 through 1N4627 series of low-noise silicon Zener diodes manufactured by Central Semiconductor Corp. These devices utilize a DO-35 axial leaded case style. The series covers voltages from 1.8 V to 6.2 V, offering consistent electrical profiles tailored for applications where standard Zener noise levels would compromise signal integrity or reference stability.

Single Zener Diodes Replacement Considerations

Cross-referencing requires matching the 3.6 V nominal voltage, 250 mW power dissipation, and DO-35 package. Verify that substitute components meet the specific low noise density requirement of 1.0 µV/√Hz and similar impedance characteristics to ensure functional equivalence in precision low-current designs.