1N4681 BK TIN/LEAD

Overview

The Central Semiconductor Corp 1N4681 BK TIN/LEAD is a silicon unidirectional Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 2.4 V with a tolerance of 5 percent. The device supports a maximum power dissipation of 0.5 W and operates within a temperature range from -65 °C to +200 °C junction temperature. Packaged in the DO-35 axial through-hole format, it exhibits a maximum reverse leakage current of 1 µA and a Zener impedance of 1.5 kΩ at a test current of 250 µA.

Feature Summary

• Utilizes metallurgically bonded construction for enhanced structural integrity
• Features double plug design suitable for high-reliability environments
• Provides low operating current characteristics for sensitive circuitry

Applications

• Voltage reference circuits requiring stable low-voltage regulation
• Protection against overvoltage transients in signal lines
• Biasing networks in analog electronic systems

Procurement Notes

Verify that the specific ordering suffix matches the required lead content specification, as tin/lead variants differ from lead-free equivalents. Confirm package type consistency with existing board layouts. Ensure thermal derating curves are reviewed for high-temperature operational scenarios to maintain component reliability and prevent premature failure during assembly or operation.

Selection Notes

Select this component when a precise 2.4 V regulation point is required in a standard axial glass package. Consider the 1.5 kΩ impedance value for noise sensitivity requirements. Evaluate the 0.5 W power rating against expected surge currents. Compare performance metrics with alternative manufacturers if supply chain diversification is necessary for long-term production stability.

Part Context

This part belongs to the 1N4681 series of low-level Zener diodes manufactured by Central Semiconductor. These devices are engineered for general-purpose voltage regulation tasks where compact size and reliable performance are prioritized. The series offers various voltage options within the same physical footprint, allowing designers to standardize on a single package type across multiple product lines while adjusting only the electrical parameters.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4681 variants meeting identical electrical specifications. Verify pinout compatibility and package dimensions before integration. Cross-reference datasheets to ensure equivalent Zener impedance and leakage current limits are maintained for critical application performance.