1N4690 TR PBFREE

Overview

The 1N4690 TR PBFREE is a single silicon unidirectional voltage regulator diode manufactured by Central Semiconductor Corp. It features a nominal Zener voltage of 5.6 V with a tolerance range of 5.32 V to 5.88 V and a power dissipation rating of 500 mW. The device utilizes a DO-35 glass axial leaded package for through-hole mounting. Key electrical characteristics include a maximum reverse leakage current of 10 µA, a test current of 50 µA, and an operating temperature range from -65 °C to +175 °C. The component is supplied in a reel packaging format.

Feature Summary

• Provides stable voltage regulation within a narrow tolerance band for precision applications
• Utilizes hermetically sealed glass construction for environmental protection
• Supports extended thermal operation up to 175 °C for high-temperature environments

Applications

• Precision voltage reference circuits
• Overvoltage protection stages
• Clamping and switching applications

Procurement Notes

Verify the specific manufacturer source, as Rochester Electronics also lists this part number. Confirm the package type matches requirements, as SOT-23 variants exist under different identifiers. Ensure the reel quantity aligns with production needs. Check RoHS compliance status directly on the datasheet. Validate that the 500 mW rating suits the thermal design.

Selection Notes

Select this component when a standard 5.6 V regulation point is required in a through-hole configuration. The DO-35 package offers robust mechanical stability compared to surface-mount alternatives. Consider the low leakage current for sensitive analog front ends. The wide temperature range supports industrial or automotive deployment scenarios where thermal extremes are present.

Part Context

This part belongs to the standard 1N46xx series of Zener diodes, widely used for general-purpose voltage regulation. Central Semiconductor produces this variant alongside other manufacturers like Microchip Technology. The TR PBFREE suffix indicates tape-and-reel packaging without halogenated materials. It serves as a direct replacement for legacy glass-encapsulated regulators in established designs.

Replacement Considerations

The 1N4690e3/TR from Microchip Technology is a confirmed substitute with identical electrical specifications and DO-35 packaging. Verify pinout compatibility and thermal resistance parameters before substitution. Ensure the alternative supplier meets the same quality standards for hermetic sealing.