1N4685 BK PBFREE

Overview

The Central Semiconductor Corp 1N4685 BK PBFREE is a silicon Zener diode designed for low-level applications requiring extremely low operating current and leakage. It operates within a temperature range of -65°C to +200°C and dissipates up to 500 mW. The nominal Zener voltage is 3.6 V with a tolerance of ±5%. Maximum reverse leakage current is 7.5 μA at the specified reverse voltage, and the maximum regulator current is 75 mA.

Feature Summary

• Designed for applications requiring extremely low operating current
• Features low leakage characteristics
• Capable of operation in high-temperature environments

Applications

• Low-level voltage regulation circuits
• Reference voltage sources
• Protection against overvoltage transients

Procurement Notes

Verify that the component matches the exact part number 1N4685 BK PBFREE. Confirm RoHS compliance status through official datasheets or manufacturer documentation before procurement. Ensure the ordering suffix PBFREE corresponds to lead-free plating as defined by the manufacturer's standard terms.

Selection Notes

Select this component when circuit design requires stable voltage reference at low currents. Verify that the 500 mW power dissipation rating meets thermal requirements. Check that the 3.6 V nominal voltage aligns with system specifications. Consider the DO-35 package constraints for PCB layout.

Part Context

This device belongs to the 1N4678 through 1N4717 series of silicon Zener diodes manufactured by Central Semiconductor Corp. The series covers a voltage range from 1.8 V to 43 V with consistent 5% tolerance and 500 mW power rating across all variants in the family.

Replacement Considerations

Substitute parts must match the 3.6 V nominal Zener voltage, 500 mW power rating, and DO-35 package. Verify electrical characteristics such as leakage current and test current compatibility with the original specification.