1N4751A-TR

Overview

The Vishay 1N4751A-TR is a silicon planar power Zener diode in the 1N4728A to 1N4761A series, housed in a DO-41 (DO-204AL) axial leaded package. It features a nominal Zener voltage of 30 V with a standard tolerance of ±5%. The device operates at a test current of 8.5 mA and supports a maximum power dissipation of 1300 mW at thermal equilibrium. Key electrical characteristics include a reverse leakage current of 5 μA at 22.8 V and dynamic resistances of 40 Ω (ZZT) and 1000 Ω (ZZK). The component is rated for a junction temperature up to 175 °C and includes a surge current capability of 150 mA.

Feature Summary

• Silicon planar construction designed for high-power stabilizing and clipping applications
• Standard Zener voltage tolerance of ±5% for reliable regulation performance
• Robust thermal handling with a junction temperature rating of 175 °C

Applications

• Voltage stabilization circuits
• High power rating clipping applications

Procurement Notes

Verify the specific part number suffix against official Vishay documentation to confirm tape-and-reel packaging specifications. Ensure that the ordering code matches the required units per reel and minimum order quantity constraints defined in the manufacturer's current datasheet revision. Cross-reference technical parameters such as Zener voltage tolerance and thermal resistance with the latest published data to guarantee compliance with design requirements before finalizing procurement.

Selection Notes

Select this component for applications requiring precise voltage reference or protection within the DO-41 form factor. Consider the 1300 mW power dissipation limit and the 175 °C junction temperature rating when designing thermal management solutions. Evaluate the dynamic resistance values to ensure signal integrity meets circuit specifications under varying load conditions.

Part Context

This device belongs to the Vishay 1N47xx series of general-purpose Zener diodes, widely utilized in electronic circuits for voltage regulation and transient suppression. The series offers a broad range of nominal voltages from 3.3 V to 75 V, providing designers with standardized options for various power levels. The 1N4751A variant specifically addresses needs for a 30 V reference point with moderate power handling capabilities in through-hole assemblies.

Replacement Considerations

Compatible substitutes within the same Vishay series include parts like 1N4750A or 1N4752A, which share identical package dimensions and thermal characteristics but offer different nominal Zener voltages. When substituting, verify that the alternative part's voltage tolerance and power dissipation ratings align with the original circuit design constraints.