1N4688 TR PBFREE

Overview

The Central Semiconductor Corp 1N4688 TR PBFREE is a silicon Zener diode designed for low-level applications requiring extremely low operating current and leakage. It features a nominal Zener voltage of 4.7 V with a tolerance of ±5%, tested at a 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. Packaged in the DO-35 axial leaded case, it offers a maximum reverse leakage current of 10 μA and a maximum regulator current of 60 mA.

Feature Summary

• Designed for applications requiring extremely low operating current and low leakage characteristics
• Provides stable voltage regulation with a tight 5% tolerance on nominal Zener voltage
• Capable of high thermal operation with an extended junction temperature range up to +200°C

Applications

• Low-level voltage reference circuits
• Precision voltage regulation in sensitive analog electronics
• Protection against overvoltage in low-current signal paths

Procurement Notes

Verify that the ordering suffix matches the required plating configuration. The PBFREE designation indicates lead-free plating compliance. Confirm the package type corresponds to the DO-35 axial leaded form factor. Ensure the requested quantity aligns with standard reel packaging requirements if applicable. Cross-reference the marking code C4688 for physical identification upon receipt.

Selection Notes

Select this component when circuit design demands minimal quiescent current consumption alongside precise voltage clamping. The low test current of 50 μA makes it suitable for battery-powered or energy-efficient systems where standard Zener diodes would introduce excessive drain. Verify that the 500 mW power rating accommodates the expected surge and continuous dissipation in the target application environment.

Part Context

This part belongs to the 1N4678 through 1N4717 series of low-level silicon Zener diodes manufactured by Central Semiconductor Corp. The series covers a voltage range from 1.8 V to 43 V, all sharing similar electrical profiles optimized for low-power operation. The 1N4688 specifically targets the 4.7 V segment of this lineup, utilizing the standard DO-35 axial package common to this family.

Replacement Considerations

Direct replacements must match the 4.7 V nominal voltage, 500 mW power rating, and DO-35 package. Verify that substitute components maintain comparable leakage currents and operate within the specified -65°C to +200°C temperature range to ensure functional equivalence.