1N4751A-T

Overview

The Diodes Incorporated 1N4751A-T is a 1.0W silicon planar Zener diode housed in a DO-41 glass package. It provides a nominal Zener voltage of 30V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse leakage current of 5µA at 22.8V. Electrical characteristics include a test current of 8.5mA, a maximum Zener impedance of 40Ω at the test current, and a thermal resistance of 175°C/W.

Feature Summary

• Utilizes a hermetically sealed glass DO-41 case for high reliability
• Provides stable voltage regulation across a wide operating temperature range
• Features lead-free finish compatible with RoHS directives

Applications

• Voltage reference circuits
• Overvoltage protection
• General-purpose voltage regulation

Procurement Notes

Verify component authenticity through authorized channels as this part is officially marked obsolete by the manufacturer. Confirm that the specific ordering suffix matches the required packaging format, noting that the '-T' designation indicates tape and reel delivery. Ensure compliance with project requirements regarding discontinued status and lifecycle management before finalizing procurement plans.

Selection Notes

Select this component when a 30V Zener voltage with ±5% tolerance is required in a DO-41 axial package. Consider the 1.0W power dissipation capability and the specified thermal resistance for heat management. Verify that the operating environment falls within the -65°C to +175°C junction temperature range and that the 40Ω impedance meets circuit stability needs.

Part Context

This component belongs to the 1N4728A through 1N4761A series of 1.0W Zener diodes manufactured by Diodes Incorporated. The series covers a nominal voltage range from 3.3V to 75V. All devices in this family share identical mechanical data, including the DO-41 glass case and UL 94V-0 flammability rating, while differing primarily in their specific Zener voltage ratings and associated electrical parameters.

Replacement Considerations

The datasheet explicitly states 'PART OBSOLETE – NO ALTERNATE PART'. No official substitute is provided by the manufacturer. Designers must evaluate alternative components from other manufacturers or different series if availability is critical, ensuring all electrical and mechanical specifications are matched.

FAQ

What is the maximum surge current rating for the 1N4751A?

The maximum surge current (8.3ms) rating for the 1N4751A is 150mA.

Does the 1N4751A-T have a specific temperature coefficient?

Yes, the temperature coefficient for the 1N4751A ranges from +0.06%/°C to +0.095%/°C at the test current.