1N4757AHR1G

Overview

The 1N4757AHR1G is a single silicon Zener diode manufactured by Taiwan Semiconductor, designed for voltage regulation and clipping applications. It features a nominal Zener voltage of 51 V with a tight tolerance of ±5%. The device operates in a DO-41 (DO-204AL) through-hole package and supports a maximum power dissipation of 1 W. Key electrical characteristics include a maximum reverse leakage current of 5 µA and a Zener impedance of 95 Ohms at a test current of 5 mA. It is qualified under AEC-Q101 standards and functions within an operating temperature range from -55 °C to +150 °C.

Feature Summary

• Provides precise voltage regulation with a 5% tolerance on the 51 V Zener voltage.
• Qualified for automotive electronics applications under the AEC-Q101 standard.
• Engineered for high thermal stability with a maximum junction temperature rating of 150 °C.

Applications

• Voltage regulation in automotive electronic control units
• Clipping circuits requiring stable reference voltages
• Protection circuits in automotive-grade power supplies

Procurement Notes

Verify component authenticity and lot traceability directly with Taiwan Semiconductor or authorized distributors before procurement. Confirm that the specific batch meets AEC-Q101 qualification requirements for your application. Ensure the DO-41 package dimensions align with your PCB layout constraints. Request the official datasheet and reliability reports to validate performance specifications against your design criteria.

Selection Notes

Select this component when a 51 V regulated voltage is required with tighter than standard tolerance. The AEC-Q101 qualification makes it suitable for automotive environments where reliability is critical. Compare the 95 Ohm impedance and 5 µA leakage against circuit sensitivity requirements. Ensure the 1 W power rating accommodates the expected thermal load in the target application environment.

Part Context

This part belongs to the 1N4757AH series of glass-passivated silicon Zener diodes. It utilizes the standard JEDEC DO-41 axial leaded package, facilitating easy integration into through-hole manufacturing processes. The suffix 'R1G' indicates reel packaging and RoHS compliance, distinguishing it from bulk or non-compliant variants within the same family.

Replacement Considerations

Substitutes must match the 51 V Zener voltage, 1 W power rating, and DO-41 package. Verify that alternative parts meet AEC-Q101 automotive qualification if used in automotive contexts. Check for equivalent impedance and leakage current specifications to ensure circuit compatibility.