1N4679 BK TIN/LEAD

Overview

The Central Semiconductor Corp 1N4679 BK TIN/LEAD is a silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 2V with a tight tolerance of 2%. The device is rated for a power dissipation of 0.5W and utilizes a DO-35 glass axial leaded package. Key electrical characteristics include a maximum reverse leakage current of 5µA and a test current of 1mA. It operates within a temperature range of -55°C to 175°C, ensuring reliability in demanding environments.

Feature Summary

• Provides precise voltage regulation at low voltage levels with high accuracy.
• Constructed with hermetically sealed glass encapsulation for environmental protection.
• Utilizes double slug type construction for stable performance under thermal stress.

Applications

• Precision voltage reference circuits requiring low voltage stability.
• Overvoltage protection in sensitive electronic systems.
• Clamping applications in signal processing paths.

Procurement Notes

Verify the specific ordering suffix matches the required lead finish and packaging format. Confirm RoHS compliance status as tin/lead variants may differ from lead-free equivalents. Ensure the DO-35 package dimensions align with PCB layout constraints. Cross-reference the manufacturer part number with official datasheets to confirm electrical tolerances before procurement.

Selection Notes

Select this component when a stable 2V reference is required in a compact through-hole form factor. Consider the 0.5W power rating for thermal management in enclosed designs. Evaluate the low leakage current specifications for high-impedance circuit applications. Compare against other series in the 1N4678 group for alternative voltage options if system requirements change.

Part Context

This component belongs to the 1N4678 series of 500mW DO-35 glass Zener diodes manufactured by Central Semiconductor. The series covers a wide voltage range from 1.8V to 200V. The 1N4679 specifically targets the lower end of this spectrum, offering a 2V regulation point. It shares mechanical similarities with other devices in the family but differs in electrical parameters.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4679 or 1N4679B parts with identical 2V Zener voltage and DO-35 package. Verify that replacement components maintain the same 0.5W power dissipation and 2% tolerance. Check for equivalent thermal resistance and leakage current specifications to ensure circuit compatibility.