1N4754A

Overview

The SMC Diode Solutions 1N4754A is a silicon planar Zener diode housed in the DO-41 axial leaded package. It provides a nominal Zener voltage of 39 V with a standard tolerance of ±5%. The device supports a maximum power dissipation of 1 W and operates within a junction temperature range of -65°C to +200°C. Key electrical characteristics include a maximum reverse leakage current of 5 µA at 29.7 V and a Zener impedance of 60 Ohms measured at a test current of 6.5 mA.

Feature Summary

• Glass passivated die construction for enhanced stability
• High thermal performance enabling operation up to 200°C
• Low inductance design suitable for general switching applications

Applications

• Voltage regulation circuits
• Overvoltage protection systems
• Reference voltage sources

Procurement Notes

Verify the specific manufacturer designation, as the 1N4754A part number is widely produced by multiple semiconductor vendors including Taiwan Semiconductor, Diodes Inc., and Micro Commercial Components. Confirm that the sourced component matches the required DO-41 package dimensions and electrical tolerances specified in the official datasheet before integration into the design.

Selection Notes

Select this component when a through-hole 1 W Zener regulator is required for 39 V reference or clamping tasks. Ensure the application environment remains within the specified -65°C to +200°C operating range. Verify that the 60 Ohm impedance and 5 µA leakage current meet the circuit's precision requirements compared to lower-power alternatives.

Part Context

This component belongs to the standard 1N47xxA series of 1 Watt Zener diodes. The series offers a broad selection of voltage values from 3.3 V to 75 V in the same DO-41 glass-passivated package. It serves as a common industry-standard replacement for legacy designs requiring robust axial-leaded voltage regulation.

Replacement Considerations

Cross-reference with other manufacturers' 1N4754A parts such as those from Taiwan Semiconductor or Diodes Inc. Ensure pinout compatibility and verify that alternative suppliers offer the same ±5% tolerance and 1 W power rating.