1N4739A_T50R

Overview

The onsemi 1N4739A_T50R is a single silicon planar Zener diode housed in a DO-41 glass case. It provides a nominal Zener voltage of 9.1 V with a tolerance of ±5%. The device dissipates up to 1 W at lead temperatures below 50°C, requiring a derating of 6.67 mW/°C above this threshold. Electrical characteristics include a maximum dynamic impedance of 5 Ω and a leakage current not exceeding 10 µA. Operating and storage temperature ranges span from -65°C to +200°C.

Feature Summary

• Provides stable voltage regulation via the Zener breakdown effect within the specified operating range.
• Features low reverse leakage current for efficient operation in high-resistance circuits.
• Constructed with a hermetically sealed glass encapsulation for environmental protection.

Applications

• Voltage reference circuits
• Overvoltage protection
• Clipping and clamping applications

Procurement Notes

Verify that the T50R suffix corresponds to the specific Ammo Pack packaging configuration documented for the 1N4739A series by onsemi. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the ordering part number matches the exact electrical specifications required for the target application design.

Selection Notes

Select this component when a 9.1 V regulated voltage point is required in through-hole designs. The DO-41 package accommodates standard PCB mounting techniques. Consider the 1 W power dissipation capability and the wide thermal operating range when designing for environments subject to significant temperature fluctuations or heat generation.

Part Context

This component belongs to the JEDEC-standardized 1N47xx series of 1-watt Zener diodes manufactured by onsemi. The series covers a broad spectrum of voltage ratings from 3.3 V to 100 V, all sharing identical physical dimensions and thermal characteristics. The 1N4739A variant specifically targets the 9.1 V segment of this lineup.

Replacement Considerations

Cross-reference with other manufacturers offering the 1N4739A designation. Verify that substitute components meet the same 5% voltage tolerance, 1 W power rating, and DO-41 package constraints to ensure mechanical and electrical compatibility.