1N4687 BK PBFREE

Overview

The Central Semiconductor Corp 1N4687 BK 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 50 μA. The device dissipates up to 500 mW and operates within a junction temperature range of -65°C to +200°C. Packaged in the DO-35 axial leaded case, it provides a maximum reverse leakage current of 4.0 μA at 2.0 V and supports a maximum regulator current of 65.0 mA.

Feature Summary

• Designed for applications requiring extremely low operating current and low leakage
• Features a tight 5% voltage tolerance for precision regulation
• Capable of operation across an extended junction temperature range

Applications

• Low-level voltage reference circuits
• Precision voltage regulation
• Clamping and protection in sensitive analog signal paths

Procurement Notes

Verify that the part number suffix 'PBFREE' corresponds to lead-free plating as defined by manufacturer ordering guidelines. Confirm the specific package type matches the required mechanical footprint. Ensure the requested quantity aligns with standard manufacturing packaging configurations. Cross-reference the marking code C4687 against official datasheets to validate authenticity upon receipt.

Selection Notes

Select this component when circuit design demands minimal quiescent current consumption alongside stable voltage regulation. The DO-35 package is suitable for through-hole mounting where space constraints are not critical. Consider the maximum regulator current limits when designing bias networks to ensure the diode remains within its specified operational parameters under all load conditions.

Part Context

This device 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, maintaining consistent electrical characteristics such as low leakage and tight tolerance across the entire product line.

Replacement Considerations

Compatible substitutes include other manufacturers' 1N4687 variants or equivalent Zener diodes with matching 4.3 V nominal voltage, 500 mW power rating, and DO-35 package dimensions. Verify that alternative parts meet the same maximum leakage and voltage change specifications.