1N4684 TR TIN/LEAD

Overview

The Central Semiconductor Corp 1N4684 TR TIN/LEAD is a silicon unidirectional Zener diode housed in the DO-204AA (DO-7) glass axial package. It provides a nominal reference voltage of 3.3 V with a tolerance of 5%. The device supports a maximum power dissipation of 0.417 W and operates within a temperature range from -55 °C to +175 °C. Key electrical characteristics include a maximum reverse current of 7.5 µA at a reverse test voltage of 1.5 V. This component is designed for through-hole mounting and utilizes tin/lead terminations.

Feature Summary

• Utilizes hermetically sealed glass construction for environmental protection
• Supports high-temperature operation up to 175 °C
• Provides stable voltage regulation via Zener breakdown mechanism

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection in sensitive electronic systems
• Clamping applications in signal processing paths

Procurement Notes

Verify that the specific ordering suffix matches the required termination plating and packaging format. Confirm compliance requirements such as RoHS status, as leaded variants may not meet all environmental directives. Ensure the supplier documentation explicitly lists the 0.417 W power rating and 3.3 V nominal voltage to avoid substitution errors with similar series components.

Selection Notes

Select this component when a robust, high-temperature capable Zener diode is required for through-hole designs. The DO-7 package offers reliable performance in harsh environments due to its hermetic sealing. Consider the 5% voltage tolerance and 0.417 W power limit during thermal design to ensure safe operating margins under continuous load conditions.

Part Context

This part belongs to the standard 1N4684 series of small-signal Zener diodes manufactured by Central Semiconductor. The series is characterized by its use in general-purpose voltage regulation and protection tasks. The specific model denotes the tin/lead finish and tape-and-reel packaging configuration, distinguishing it from bulk or other terminal variants within the same electrical family.

Replacement Considerations

Direct substitutes must match the 3.3 V Zener voltage, 0.417 W power rating, and DO-7 package outline. Verify pinout compatibility and thermal resistance characteristics. Alternative manufacturers producing equivalent JEDEC-style DO-7 Zener diodes may be considered if they meet the specified electrical limits and temperature ratings.