1N4705 TR PBFREE

Overview

The Central Semiconductor Corp 1N4705 TR PBFREE is a silicon Zener diode designed for low-level applications requiring extremely low operating current and low leakage. It features a nominal Zener voltage of 18 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.

Feature Summary

• Designed for applications requiring extremely low operating current
• Features low reverse leakage characteristics
• Provides stable voltage regulation in the low-level category

Applications

• Low current voltage reference circuits
• Precision voltage regulation
• Low leakage protection applications

Procurement Notes

Verify that the ordering suffix 'PBFREE' corresponds to lead-free plating as defined by the manufacturer's standard terms. Confirm the specific reel quantity requirements align with the distributor's packaging standards. Ensure the DO-35 package dimensions match the target PCB layout constraints before finalizing procurement.

Selection Notes

Select this component when circuit design demands minimal quiescent current consumption alongside precise voltage clamping. The 50 μA test current specification makes it suitable for battery-powered or energy-sensitive systems where standard Zener diodes would introduce excessive drain. Verify thermal management capabilities for the 500 mW dissipation rating under expected ambient conditions.

Part Context

This part belongs to the 1N4678 through 1N4717 series of silicon Zener diodes manufactured by Central Semiconductor. The series covers a voltage range from 1.8 V to 43 V, all sharing the same low-level electrical profile and DO-35 mechanical outline. The 1N4705 specifically addresses the 18 V segment of this standardized product line.

Replacement Considerations

Cross-reference with other manufacturers offering 1N4705 specifications in the DO-35 package. Ensure replacement parts maintain the 50 μA test current and 500 mW power rating to preserve circuit performance characteristics.