1N4685 TR PBFREE

Overview

The Central Semiconductor Corp 1N4685 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 3.6 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. It utilizes the DO-35 axial leaded package.

Feature Summary

• Designed for applications requiring extremely low operating current (50μA) and low leakage characteristics.
• Provides stable voltage regulation with a tight ±5% tolerance on the nominal Zener voltage.
• Capable of handling high thermal stress with an extended junction temperature rating up to +200°C.

Applications

• Low-level voltage reference circuits
• Precision voltage regulation in sensitive analog systems
• Protection against overvoltage transients

Procurement Notes

Verify that the ordering suffix 'TR' corresponds to the specific tape and reel packaging configuration required by your automated assembly equipment. Confirm that the 'PBFREE' designation aligns with RoHS compliance requirements for your manufacturing process. Ensure the DO-35 axial lead form factor fits the designated footprint on the printed circuit board layout.

Selection Notes

Select this component when the application demands minimal quiescent current consumption, as indicated by the 50 μA test current specification. The 500 mW power rating allows for moderate current handling in series regulator configurations. Consider the DO-35 package constraints regarding PCB mounting orientation and lead spacing compared to surface-mount alternatives.

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 such as low leakage and a 500 mW power dissipation capability. The 1N4685 specifically addresses the 3.6 V segment of this lineup.

Replacement Considerations

Cross-reference with other manufacturers offering 1N4685 or equivalent 3.6 V Zener diodes in the DO-35 package. Verify that substitute components meet the same 500 mW power rating, ±5% tolerance, and low leakage specifications to ensure functional compatibility in existing designs.