1N4678 TR PBFREE

Overview

The Central Semiconductor Corp 1N4678 TR PBFREE is a silicon Zener diode designed for low-level voltage regulation applications. It operates within the 1N4678 series, featuring a nominal Zener voltage of 1.8 V with a tolerance of ±5%. The device dissipates up to 500 mW and functions at a test current of 50 μA. It utilizes a DO-35 axial leaded package and supports an operating junction temperature range from -65°C to +200°C.

Feature Summary

• Designed for extremely low operating currents and low leakage conditions
• Provides stable voltage regulation across a wide thermal range
• Features a standard axial leaded package for through-hole mounting

Applications

• Low power voltage reference circuits
• Precision voltage regulation in sensitive electronics
• Overvoltage protection for low-voltage signal lines

Procurement Notes

Verify that the ordering suffix 'TR PBFREE' corresponds to the specific tape-and-reel packaging configuration required by your assembly process. Confirm RoHS compliance status directly with the manufacturer or authorized distributor documentation before finalizing procurement orders.

Selection Notes

Select this component when circuit design requires a precise 1.8 V reference point with minimal quiescent current draw. Ensure the maximum power dissipation rating of 500 mW aligns with the thermal management capabilities of the target PCB layout and operating 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 identical mechanical outlines and maximum ratings while varying in specific Zener voltage characteristics.

Replacement Considerations

Cross-reference with other manufacturers offering 1N4678 specifications in a DO-35 package. Verify that substitute components match the 50 μA test current requirement and maintain equivalent reverse leakage characteristics for low-level applications.