1N4705 BK PBFREE

Overview

The Central Semiconductor Corp 1N4705 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 18 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. It utilizes the DO-35 axial leaded package.

Feature Summary

• Designed for applications requiring extremely low operating current (50μA) and low leakage
• Provides stable voltage regulation with 5% tolerance across the specified voltage range
• Capable of operation in high-temperature environments up to +200 °C junction temperature

Applications

• Low power voltage reference circuits
• Precision voltage regulation in sensitive analog electronics
• Protection against overvoltage transients in low-current signal lines

Procurement Notes

Verify that the specific part number includes the 'PBFREE' suffix to ensure compliance with lead-free plating requirements as defined by the manufacturer's ordering guidelines. Confirm the package type matches the DO-35 mechanical outline specifications provided in the datasheet before finalizing procurement orders.

Selection Notes

Select this component when circuit design demands minimal quiescent current draw alongside reliable voltage clamping. The 500 mW power rating supports moderate dissipation needs, while the wide thermal operating range ensures stability in harsh environmental conditions compared to standard commercial grade alternatives.

Part Context

This component 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 identical maximum ratings and low-level electrical characteristics optimized for precision and low-power consumption applications.

Replacement Considerations

Cross-reference with other manufacturers offering 1N4705 equivalents in the DO-35 package. Ensure replacement parts maintain the 50 μA test current requirement and 5% tolerance to preserve original circuit performance parameters.