1N4707 TR PBFREE

Overview

The Central Semiconductor Corp 1N4707 TR PBFREE is a silicon Zener diode from the low-level series, designed for applications requiring extremely low operating current and leakage. It features a nominal Zener voltage of 20 V with a 5% tolerance range spanning 19.00 V to 21.00 V at a test 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 low-level applications requiring extremely low operating current and minimal reverse leakage.
• Provides stable voltage regulation with a tight 5% tolerance across the specified voltage range.
• Capable of high thermal operation with an extended junction temperature rating up to 200°C.

Applications

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

Procurement Notes

Verify that the ordering suffix matches the required plating specification. The 'PBFREE' designation indicates lead-free plating compliance. Confirm the 'TR' suffix aligns with the desired packaging format, as standard availability may vary between bulk reels and cut tape depending on distributor inventory. Ensure the component meets RoHS requirements for your specific assembly process.

Selection Notes

Select this component when circuit design demands very low quiescent current consumption, specifically around 50 μA. The 500 mW power rating allows for moderate current handling in a compact DO-35 package. Consider the maximum regulator current of 11.9 mA when designing bias networks to ensure the diode remains in the breakdown region without exceeding thermal limits under worst-case conditions.

Part Context

This part belongs to the 1N4678 through 1N4717 series of low-level silicon Zener diodes manufactured by Central Semiconductor. The series covers a voltage range from 1.8 V to 43 V, all sharing common electrical characteristics such as low leakage and a 50 μA test current. These devices are intended for general-purpose voltage regulation where low power consumption is a primary constraint.

Replacement Considerations

Direct replacements must match the 20 V nominal Zener voltage, 500 mW power dissipation, and DO-35 package. Verify that substitute components maintain the 50 μA test current requirement to ensure equivalent low-level performance. Cross-reference with other manufacturers offering 1N4707 equivalents to confirm pinout and thermal compatibility.