1N4745ATR

Overview

The onsemi 1N4745ATR 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

• Hermetically sealed glass construction for robust environmental protection
• High thermal stability enabling operation up to 200°C junction temperature
• Low leakage current characteristics for efficient regulation
• Standard axial leaded configuration for easy circuit integration

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in power supplies
• Clamping applications in signal conditioning paths

Procurement Notes

Verify the specific suffix 'ATR' against the manufacturer's official datasheet to confirm packaging details and lot traceability requirements. Ensure the procurement channel provides valid origin documentation matching onsemi specifications. Cross-reference the part number with authorized distributor catalogs to confirm current manufacturing status and compliance certifications before finalizing orders.

Selection Notes

Select this component when a standard 16 V regulation point is required in through-hole designs. The DO-41 package offers sufficient power handling for general industrial applications. Consider the wide operating temperature range for environments subject to significant thermal fluctuations. Verify that the 5% voltage tolerance meets the precision requirements of the target circuit design.

Part Context

This device belongs to the 1N47 series of Zener diodes, a widely recognized family for voltage regulation. The 1N4745A designation specifically identifies the 16 V variant within this lineage. The 'ATR' suffix typically denotes tape and reel packaging for automated assembly processes, distinguishing it from bulk or other packaging formats available in the same product line.

Replacement Considerations

Equivalent parts include Vishay 1N4745A-TR and Fairchild 1N4745A_T50A. These alternatives share identical electrical ratings and DO-41 packaging. Verify pinout compatibility and thermal derating curves before substitution.