1N4625 BK PBFREE

Overview

The Central Semiconductor Corp 1N4625 BK PBFREE is a silicon Zener diode designed for low leakage, low current, and low noise applications. It operates within the 1N4614 through 1N4627 series, featuring a nominal Zener voltage of 5.1 V with a 5% tolerance range from 4.845 V to 5.355 V. The device dissipates up to 250 mW at 25°C and maintains a maximum reverse current of 10 µA at 3.0 V. It utilizes a DO-35 axial leaded package.

Feature Summary

• Engineered for low noise environments with a specified noise density of 2.0 µV/Hz at 250µA test current.
• Optimized for low leakage and low current operation suitable for sensitive circuitry.
• Features a standard DO-35 case outline for reliable through-hole mounting.

Applications

• Low noise voltage reference circuits
• Precision low current regulation
• Sensitive analog signal conditioning

Procurement Notes

Verify that the specific ordering suffix matches the required plating finish. The 'BK' designation indicates bulk packaging, while 'PBFREE' confirms lead-free compliance. Confirm the manufacturer part number against the official datasheet to ensure correct voltage tolerance and package type before procurement.

Selection Notes

Select this component when a stable 5.1 V reference is required in low-power designs. Ensure the application current does not exceed the maximum Zener current of 55 mA. Verify that the operating temperature remains within the -65°C to +200°C junction range for proper thermal management.

Part Context

This component belongs to the 1N4614 through 1N4627 series of low-noise silicon Zener diodes manufactured by Central Semiconductor. These devices are specifically characterized for minimal noise generation and low reverse leakage currents, distinguishing them from general-purpose Zener diodes used in higher power or noisier applications.

Replacement Considerations

Compatible substitutes include other manufacturers' 1N4625 equivalents. Verify that replacement parts match the 5.1 V nominal voltage, 250 mW power dissipation, and DO-35 package dimensions to ensure mechanical and electrical compatibility.

FAQ

What is the maximum reverse current for the 1N4625?

The maximum reverse current is 10 µA when measured at 3.0 V.

What is the noise density specification?

The noise density is specified as 2.0 µV/Hz at a test current of 250 µA.