1N4754A_T50R

Overview

The onsemi 1N4754A_T50R is a Zener diode with a nominal voltage of 39 V and a tolerance of ±5%. It operates within a junction temperature range of -65°C to +200°C. The device features a maximum power dissipation of 1.0 W at lead temperatures up to 50°C, derating by 6.67 mW/°C above this threshold. Electrical characteristics include a maximum Zener impedance (ZZ) of 6.5 Ω at the test current of 39 mA and a leakage current of 5 µA at 29.7 V reverse voltage. The package is DO-41 glass case.

Feature Summary

• Provides stable voltage regulation via Zener breakdown mechanism in the reverse bias region.
• Constructed with a glass encapsulated DO-41 axial leaded package for robust mechanical mounting.
• Capable of handling non-repetitive peak reverse surge currents up to 115 mA.

Applications

• Voltage reference circuits requiring precise potential levels.
• Overvoltage protection stages in electronic systems.
• Clipping and clamping applications in signal processing paths.

Procurement Notes

Verify the specific ordering suffix _T50R against official manufacturer documentation to confirm reel quantity or tape-and-reel specifications. Ensure the component matches the 1N4754A electrical profile defined in the datasheet. Confirm that the DO-41 package dimensions align with the target PCB layout requirements before finalizing procurement decisions.

Selection Notes

Select this component when a 39 V Zener voltage with 5% tolerance is required. Consider the 1.0 W power dissipation limit and thermal derating characteristics for high-temperature environments. Evaluate the 6.5 Ω dynamic impedance for noise-sensitive applications. Compare leakage current specifications against circuit sensitivity requirements to ensure proper operation under reverse bias conditions.

Part Context

This part belongs to the 1N4728A through 1N4758A series of Zener diodes manufactured by onsemi. The series covers a wide range of voltage ratings from 3.3 V to 56 V. All devices share similar physical packaging and general electrical testing conditions, differing primarily in their specific Zener voltage values and associated impedance parameters.

Replacement Considerations

Cross-reference with other manufacturers offering 1N4754A equivalents. Verify that substitute parts meet the same 39 V nominal voltage, 5% tolerance, and DO-41 package constraints. Ensure thermal and electrical ratings match or exceed the original specifications.

FAQ

What is the maximum power dissipation rating?

The maximum power dissipation is 1.0 W at a lead temperature of 50°C or less, with a derating factor of 6.67 mW/°C above 50°C.

What is the operating temperature range?

The device supports an operating and storage temperature range from -65°C to +200°C.