1N4745A_T50R

Overview

The onsemi 1N4745A_T50R is a silicon planar Zener diode in the 1N4728A-1N4758A series, housed in a DO-41 glass case. It provides voltage regulation with a nominal Zener voltage of 16 V and a tolerance of ±5%. The device dissipates up to 1.0 W at lead temperatures ≤50°C, derating by 6.67 mW/°C above this threshold. Electrical characteristics include a maximum dynamic impedance of 16 Ω at a test current of 15.5 mA and a maximum leakage current of 5 µA at 12.2 V. It operates within a temperature range of -65°C to +200°C.

Feature Summary

• Utilizes silicon planar technology for stable voltage regulation
• Features a hermetically sealed DO-41 glass axial package
• Supports high junction and storage temperatures up to 200°C

Applications

• Voltage reference circuits
• Clipper and clamper circuits
• Overvoltage protection

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging details. Confirm RoHS compliance status and REACH SVHC declarations directly from the manufacturer datasheet or component database before procurement. Ensure the supplier source matches authorized distribution channels to guarantee authenticity.

Selection Notes

Select this component when a standard 16 V regulation point is required in through-hole designs. Consider the 16 Ω dynamic impedance for applications needing moderate noise performance. Verify that the 1.0 W power dissipation rating aligns with the thermal management capabilities of the target circuit board layout.

Part Context

This part belongs to the widely used 1N47xxA series of 1-watt Zener diodes manufactured by onsemi. These devices are standardized JEDEC components designed for general-purpose voltage regulation. The 'T50R' suffix typically indicates a specific tape-and-reel packaging configuration for automated assembly processes.

Replacement Considerations

Compatible substitutes include the 1N4745A from Fairchild Semiconductor and Panasonic (PANJIT). Cross-reference specifications such as the 16 V nominal voltage, 5% tolerance, and DO-41 package dimensions to ensure mechanical and electrical compatibility.