1N4754A-T

Overview

The 1N4754A-T is a silicon planar power Zener diode manufactured by Diodes Incorporated, designed for voltage regulation applications. It features a nominal Zener voltage of 39 V with a standard tolerance of 5%. The device operates within a test current range of 6.5 mA and exhibits a maximum Zener impedance of 60 Ω at this current level. It supports a maximum power dissipation of 1.0 W at 25°C ambient temperature, derating linearly above 50°C at a rate of 6.67 mW/°C. The component utilizes a DO-41 glass axial leaded package and maintains an operating junction and storage temperature range from -65°C to +175°C.

Feature Summary

• Glass passivated die construction housed in a DO-41 plastic case with UL flammability classification rating 94V-0.
• Lead-free finish compliant with RoHS directives, utilizing Sn96.5Ag3.5 terminal finish solderable per MIL-STD-202.
• Single unidirectional configuration optimized for general-purpose voltage regulation tasks.

Applications

• General purpose voltage regulation circuits
• Power supply reference voltage generation
• Overvoltage protection stages

Procurement Notes

Verify the specific ordering suffix '-T' corresponds to the Tape & Reel packaging format containing 5,000 units per reel. Confirm that the part number includes the '-A' designation if Ammo Pack packaging is required instead. Ensure compliance requirements match the Lead-Free Finish specification noted in the datasheet. Check for any specific environmental exemptions regarding high-temperature solder or glass materials as defined in EU Directive Annex Notes.

Selection Notes

Select this component when a 39 V reference point is required with ±5% accuracy. Consider the thermal resistance characteristics and derating curves for high-ambient temperature environments. Evaluate the maximum surge current capability against transient voltage events. Compare the low reverse leakage current specifications against alternative regulators to ensure minimal quiescent current draw in sensitive designs.

Part Context

This device belongs to the 1N4728A through 1N4761A series of 1.0 W Zener diodes produced by Diodes Incorporated. The series covers a wide nominal Zener voltage range from 3.3 V to 75 V. All devices in this family share identical mechanical data, including the DO-41 glass case and standardized terminal finishes. The series provides a consistent platform for designers requiring robust, high-power voltage regulation components.

Replacement Considerations

Diodes Incorporated recommends using the DFLZxx series for new designs, as the 1N4754A-T is not recommended for new design. Verify pinout compatibility and thermal performance before substituting with other manufacturers' equivalents. Ensure replacement parts meet the same DO-41 package dimensions and electrical tolerances.

FAQ

What is the difference between the -A and -T suffixes?

The -A suffix indicates Ammo Pack packaging, while the -T suffix indicates Tape & Reel packaging. Both contain 5,000 units per shipping quantity.

How does power dissipation change with temperature?

The device dissipates up to 1.0 W at 25°C ambient temperature. Above 50°C, the power must be derated linearly at a rate of 6.67 mW/°C.