1N4746ATR

Overview

The onsemi 1N4746ATR is a single-channel Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 18 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1 W and operates within an extended temperature range from -65 °C to +200 °C. Key electrical characteristics include a maximum reverse leakage current of 5 µA, a Zener impedance of 20 Ohms, and a test current of 14 mA. It utilizes the DO-41-2 through-hole package.

Feature Summary

• Provides stable voltage regulation at a nominal 18 V reference level
• Capable of handling up to 1 W of power dissipation
• Operates reliably across a wide temperature spectrum extending to +200 °C

Applications

• General-purpose voltage regulation circuits
• Reference voltage sources in electronic systems
• Overvoltage protection stages

Procurement Notes

Verify component authenticity by cross-referencing the manufacturer part number 1N4746ATR with official onsemi documentation. Confirm that the DO-41-2 package and RoHS compliance status match project requirements. Ensure the supplier provides valid traceability records for this specific semiconductor batch.

Selection Notes

Select this component when a precise 18 V regulation point is required with high thermal stability. The DO-41-2 through-hole format facilitates standard PCB mounting. Consider the 20 Ohm impedance and 5 µA leakage limits for circuit sensitivity requirements before finalizing the design.

Part Context

This component belongs to the 1N4746A series of Zener diodes manufactured by onsemi. It serves as a standardized solution for low-power voltage clamping and regulation tasks. The ATR suffix indicates specific reel packaging configurations for automated assembly processes.

Replacement Considerations

Direct substitutes include the 1N4746A from other manufacturers such as Central Semiconductor or Vishay, provided they meet the identical 18 V, 1 W, and DO-41 specifications.