1N4756A-T

Overview

The Vishay General Semiconductor - Diodes Division 1N4756A-T is a single silicon unidirectional voltage regulator diode housed in a DO-41 package. It features a nominal Zener voltage of 47 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1.3 W and operates within a temperature range of -65 °C to +200 °C. Key electrical parameters include a test current of 5.5 mA, a maximum reverse leakage current of 5 µA, and a Zener impedance of 80 Ω.

Feature Summary

• Hermetically sealed glass construction for environmental protection
• Double slug type compression bonded design
• Oxide passivated die for stability

Applications

• Voltage regulation circuits
• Reference voltage sources
• Overvoltage protection

Procurement Notes

Verify the specific manufacturer designation as sourcing data indicates this part number may be discontinued by some vendors. Confirm the exact power rating (1W vs 1.3W) and package variant against the official datasheet before procurement. Ensure compliance with RoHS standards if required for the target application.

Selection Notes

Select this component for through-hole applications requiring a stable 47 V reference. Consider the thermal resistance and ambient operating temperature limits when designing the heat dissipation path. Verify that the 80 Ω Zener impedance meets the dynamic regulation requirements of the circuit.

Part Context

This component belongs to the standard 1N47xx series of axial leaded Zener diodes. It is widely used in general-purpose electronics for basic voltage clamping and regulation tasks. The DO-41 package provides a robust mechanical structure suitable for manual assembly or standard automated placement processes.

Replacement Considerations

Equivalent parts include the 1N4756A from other manufacturers such as onsemi or Taiwan Semiconductor. Verify pinout compatibility and ensure the replacement meets the same 47 V Zener voltage and 1.3 W power dissipation specifications.