1N4757A-T

Overview

The Vishay General Semiconductor - Diodes Division 1N4757A-T is a single silicon Zener diode housed in the DO-204AL (DO-41) axial through-hole package. It features a nominal Zener voltage of 51 V with a tolerance of ±5% and a maximum power dissipation of 1.3 W. The device exhibits a maximum dynamic impedance of 95 Ohms at a test current of 5 mA, with a reverse leakage current of 5 µA at 38.8 V. It supports a junction temperature up to 175°C and operates within an ambient range of -65°C to +175°C.

Feature Summary

• Provides stable voltage regulation via Zener breakdown characteristics in the DO-41 axial leaded package.
• Engineered for high thermal stability with a maximum junction temperature rating of 175°C.
• Ensures precise voltage control with a tight ±5% tolerance on the 51 V nominal breakdown voltage.

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in electronic systems
• General-purpose clipping and clamping applications

Procurement Notes

Verify the specific suffix 'T' against official Vishay documentation to confirm packaging details, as standard listings often default to TR or TAP variants. Ensure the required axial through-hole form factor matches the DO-41 specification. Confirm RoHS compliance status for the specific manufacturing batch if environmental regulations apply to the final assembly.

Selection Notes

Select this component when a 51 V regulation point is required in a through-hole design. The 1.3 W power rating allows for moderate current handling compared to lower-power SMD alternatives. Verify that the 95 Ohm dynamic impedance meets the noise and regulation requirements of the target circuit application.

Part Context

This part belongs to the 1N4757 series of Zener diodes manufactured by Vishay. The series offers various voltage ratings within the same DO-41 package family, allowing designers to standardize on a single footprint while adjusting voltage values. The 1N4757A variant specifically denotes the tighter ±5% tolerance version of the base 1N4757 model.

Replacement Considerations

Cross-reference with other manufacturers offering 1N4757A equivalents in DO-41 packages. Ensure substitute parts match the 51 V Zener voltage, 1.3 W power rating, and ±5% tolerance specifications to maintain circuit performance integrity.