1N4761A

Overview

The 1N4761A is a unidirectional voltage regulator diode manufactured by SMC Diode Solutions. It features a nominal Zener voltage of 75 V and a maximum power dissipation of 1 W. The device utilizes silicon technology and is housed in a DO-41 axial leaded package. Key electrical characteristics include a maximum dynamic impedance of 175 Ω and a test current of 3.3 mA. The component supports a maximum junction temperature of 150 °C and operates within a storage temperature range of -65 °C to +150 °C.

Feature Summary

• Provides stable voltage regulation at a nominal 75 V reference level
• Utilizes silicon construction for reliable unidirectional operation
• Features a DO-41 molded glass case with axial leads for through-hole mounting

Applications

• Voltage regulation in DC power supply circuits
• Overvoltage protection for sensitive electronic components
• Reference voltage generation in analog signal processing

Procurement Notes

Verify the specific manufacturer datasheet for the 1N4761A, as specifications such as tolerance and thermal ratings may vary between production batches or original equipment manufacturers. Confirm compliance with relevant environmental standards and ensure the package type matches the intended PCB footprint before procurement.

Selection Notes

Select this component when a standard 75 V Zener voltage is required for low-power regulation applications. Ensure the circuit design accommodates the 1 W power dissipation limit and the 175 Ω dynamic impedance. Verify that the operating temperature range aligns with the system's thermal environment requirements.

Part Context

The 1N4761A belongs to the widely recognized 1N47xx series of Zener diodes, which are standardized for general-purpose voltage regulation. This series is commonly used in industrial and consumer electronics due to its availability and consistent performance characteristics across various semiconductor manufacturers.

Replacement Considerations

Cross-reference with other manufacturers' 1N4761A parts to verify pinout compatibility and electrical parameter tolerances. Ensure substitute components meet the same DO-41 package dimensions and thermal management requirements.