1N4745A

Overview

The onsemi 1N4745A is a single-channel general-purpose Zener diode housed in a DO-41 through-hole package. It features a nominal Zener voltage of 16 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1 W and operates within a temperature range of -65°C to +200°C. Key electrical parameters include a test current of 15.5 mA, a maximum Zener impedance of 16 Ω, and a maximum reverse leakage current of 5 μA.

Feature Summary

• Provides stable voltage regulation via the Zener breakdown effect for circuit protection and reference applications.

Applications

• Voltage regulation in power supply circuits
• Overvoltage protection for sensitive electronic components

Procurement Notes

Verify the specific manufacturer source, as the 1N4745A designation is utilized by multiple semiconductor producers including Fairchild, Microchip, and Panjit. Confirm that the received component matches the onsemi specification sheet regarding pinout, marking codes, and electrical tolerances before integration into production designs.

Selection Notes

Select this component when a standard 16 V reference point is required in axial leaded configurations. Ensure the application environment remains within the specified thermal limits and that the 1 W power rating accommodates the expected steady-state dissipation without exceeding junction temperature constraints.

Part Context

This part belongs to the widely adopted 1N47xx series of glass-passivated Zener diodes. The 1N4745A specifically targets the 16 V segment of this family, offering a balance of voltage precision and power handling capability suitable for general industrial and commercial electronics requiring reliable voltage clamping.

Replacement Considerations

Cross-reference with other manufacturers' 1N4745A parts such as those from Fairchild or Microchip. Verify compatibility with DO-41 mechanical dimensions and ensure equivalent electrical performance metrics are met for direct substitution.