1N4688-1/TR

Overview

The 1N4688-1/TR is a single Zener diode manufactured by Microchip Technology, designed for voltage regulation applications. It features a nominal Zener voltage of 4.7 V with a tolerance of ±5%. The device supports a maximum power dissipation of 500 mW and operates within a temperature range of -65°C to +175°C. Key electrical parameters include a reverse leakage current of 10 µA at 3 V and a forward voltage of 1.1 V at 200 mA. It is housed in the DO-204AH (DO-35) axial through-hole package.

Feature Summary

• Provides stable voltage regulation with a nominal 4.7 V Zener breakdown.
• Capable of handling up to 500 mW of power dissipation.
• Operates reliably across an extended industrial temperature range from -65°C to +175°C.
• Utilizes a standard DO-204AH axial leaded package for through-hole mounting.

Applications

• Voltage reference circuits
• Overvoltage protection
• Clipping and clamping circuits

Procurement Notes

Verify the specific suffix -1/TR against official Microchip documentation to confirm tape-and-reel packaging specifications. Ensure compatibility with existing PCB footprints for the DO-204AH package. Cross-reference datasheet revisions to confirm parameter consistency, particularly regarding leakage current and thermal characteristics, before finalizing procurement decisions.

Selection Notes

Select this component when a precise 4.7 V reference is required in through-hole designs. Consider the 500 mW power rating for thermal management in enclosed spaces. The wide operating temperature range makes it suitable for harsh environments where standard commercial-grade diodes may fail. Verify that the ±5% tolerance meets the circuit's precision requirements.

Part Context

This part belongs to the 1N468x series of single Zener diodes produced by Microchip Technology. The series offers various voltage options within the same DO-204AH package form factor. The 1N4688 variant specifically targets the 4.7 V market segment, providing a standardized solution for legacy and modern electronic designs requiring reliable voltage regulation.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4688 equivalents meeting JEDEC standards. Ensure replacement parts maintain the same DO-204AH footprint and 500 mW power rating. Verify that alternative sources offer comparable ±5% voltage tolerance and similar thermal performance characteristics.

FAQ

What is the maximum reverse leakage current specified for this diode?

The maximum reverse leakage current is 10 µA when measured at 3 V.

Does the -1/TR suffix indicate a change in electrical function?

No, the suffix typically denotes packaging configuration (tape and reel) rather than a change in electrical functionality or parameters.