1N4756A

Overview

The SMC Diode Solutions 1N4756A is a silicon planar Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 47 V with a standard tolerance of ±5%. The device is rated for a maximum power dissipation of 1 W and operates within a temperature range of -65 °C to +200 °C. Packaged in the DO-41 axial leaded format, it exhibits a maximum reverse leakage current of 5 µA at 35.8 V and a Zener impedance of 80 Ω at a test current of 5.5 mA.

Feature Summary

• Utilizes silicon planar technology for stable voltage regulation
• Features hermetically sealed glass construction for environmental protection
• Provides high thermal stability with an extended operating temperature range

Applications

• Voltage reference circuits
• Overvoltage protection systems
• Clipper and clamping circuits

Procurement Notes

Verify the specific manufacturer designation when sourcing, as the 1N4756A part number is utilized by multiple semiconductor producers including onsemi, Vishay, and Microchip. Confirm that the component matches the required DO-41 package dimensions and electrical parameters specified in the official datasheet before integration into the design.

Selection Notes

Select this component for through-hole designs requiring a precise 47 V reference point. Ensure the circuit can handle the 1 W power dissipation limit under worst-case conditions. Consider the 80 Ω dynamic impedance for applications sensitive to voltage fluctuations during current changes.

Part Context

This component belongs to the widely recognized 1N47xx series of one-watt Zener diodes. The series covers a broad spectrum of voltage ratings from 3.3 V to 100 V, providing designers with standardized options for various regulation needs across industrial and consumer electronics sectors.

Replacement Considerations

Compatible substitutes include the 1N4756A manufactured by onsemi, Vishay Semiconductors, and Taiwan Semiconductor. Verify pinout compatibility and ensure the replacement meets the same 1 W power rating and 47 V nominal voltage specifications.