1N4756A

Overview

The onsemi 1N4756A is a single silicon planar Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 47 V with a tolerance of ±5%. The device operates in a DO-41-2 through-hole package, supporting a power dissipation of 1 W. Key electrical parameters include a maximum reverse leakage current of 5 µA and a Zener impedance of 80 Ohms at a test current of 5.5 mA. The component is rated for an operating temperature range from -65 °C to +200 °C.

Feature Summary

• Provides stable voltage regulation using a single silicon planar structure.
• Features compression bonded construction within a hermetically sealed glass package.
• Supports through-hole mounting for standard circuit board integration.

Applications

• General purpose voltage reference circuits
• Overvoltage protection stages
• Power supply regulation modules

Procurement Notes

Verify the specific manufacturer source, as multiple vendors produce this standard part number. Confirm RoHS compliance status and packaging type (bulk vs. reel) against your bill of materials. Ensure the selected variant matches the required thermal resistance and lead form specifications for your assembly process.

Selection Notes

Select this component when a 47 V reference point is required in low-power analog or digital circuits. The DO-41 package suits manual or wave soldering processes. Consider the 1 W power rating for thermal management in enclosed environments. Verify that the 5% voltage tolerance meets the precision requirements of the target application design.

Part Context

This part belongs to the widely used 1N47xxA series of axial leaded Zener diodes. These components are standardized across the semiconductor industry for basic voltage clamping and regulation tasks. The 1N4756A specifically targets the mid-range voltage segment of this family, offering a balance between breakdown stability and power handling capabilities.

Replacement Considerations

Equivalent parts include Vishay 1N4756A-TR and Taiwan Semiconductor 1N4756A. Verify pinout compatibility and package dimensions before substitution. Check if automotive qualification (AEC-Q101) is required, as standard industrial versions differ from automotive-grade variants like the 1N4756AHR1G.