1N4684 BK PBFREE

Overview

The Central Semiconductor Corp 1N4684 BK PBFREE is a silicon Zener diode from the 1N4678 series, designed for low-level applications requiring extremely low operating current and leakage. It features a nominal Zener voltage of 3.3 V with a 5% tolerance range (3.135 V to 3.465 V) at a test current of 50 μA. The device supports a maximum power dissipation of 500 mW and operates within a junction temperature range of -65°C to +200°C. It utilizes a DO-35 axial leaded package.

Feature Summary

• Designed for applications requiring extremely low operating current and low leakage characteristics
• Provides stable voltage regulation with a tight 5% tolerance across the specified voltage range
• Capable of operation in high-temperature environments up to a junction temperature of +200°C

Applications

• Low-level voltage reference circuits
• Precision voltage regulation in sensitive electronic systems
• Protection against overvoltage conditions in low-power designs

Procurement Notes

Verify that the ordering suffix 'PBFREE' corresponds to lead-free plating as defined by the manufacturer's standard terms. Confirm the specific marking code 'C4684' matches the physical component received. Ensure the procurement documentation explicitly references the 1N4678 series datasheet to validate electrical parameters such as reverse leakage and Zener impedance.

Selection Notes

Select this component when circuit design requires a precise 3.3 V reference with minimal quiescent current draw. The DO-35 package is suitable for through-hole mounting. Consider the maximum regulator current of 80 mA when designing bias networks. Verify that the ambient temperature does not exceed limits that would cause power derating below the required 500 mW rating.

Part Context

This part belongs to the Central Semiconductor 1N4678 through 1N4717 series of silicon Zener diodes. The series covers a voltage range from 1.8 V to 43 V, all sharing common mechanical outlines and low-level performance characteristics. The 1N4684 specifically targets the lower end of this voltage spectrum, offering a nominal 3.3 V output.

Replacement Considerations

Cross-reference with other manufacturers' 1N4684 equivalents. Verify that substitute parts meet the same 50 μA test current requirement and DO-35 package dimensions. Ensure replacement devices maintain the specified maximum reverse leakage current and power dissipation ratings.