1N4687 TR PBFREE

Overview

The Central Semiconductor Corp 1N4687 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 4.3 V with a ±5% tolerance, 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. It utilizes the DO-35 axial leaded package and includes a Pb-free plating suffix.

Feature Summary

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

Applications

• Low-level voltage regulation circuits
• Reference voltage sources in sensitive analog designs
• Protection against overvoltage transients in low-power systems

Procurement Notes

Verify that the ordering suffix 'PBFREE' corresponds to lead-free plating specifications as defined by the manufacturer's standard terms. Confirm the package type matches the required DO-35 mechanical outline for your PCB layout. Ensure the component meets RoHS compliance requirements if applicable to your manufacturing standards.

Selection Notes

Select this component when circuit design demands minimal quiescent current consumption alongside precise voltage clamping. The 50 μA test current makes it suitable for battery-operated or energy-efficient systems where standard Zener diodes would introduce excessive leakage. Verify that the 500 mW power rating aligns with the expected thermal 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 characteristics optimized for low-current operation. The 1N4687 specifically addresses the 4.3 V segment of this lineup.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4687 variants. Ensure any replacement maintains the 500 mW power rating, DO-35 package, and comparable leakage current specifications to preserve circuit performance.