1N4757A BK TIN/LEAD

Overview

The Central Semiconductor Corp 1N4757A BK TIN/LEAD 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%. The device supports a maximum power dissipation of 1 W and operates within a temperature range of -65°C to +175°C junction temperature. Key electrical characteristics include a maximum reverse leakage current of 5 µA at 38.8 V and a maximum dynamic impedance of 95 Ω.

Feature Summary

• Provides stable voltage regulation for circuits requiring a 51 V reference point.
• Utilizes a plastic encapsulated DO-41 axial leaded package for robust through-hole mounting.
• Designed for high thermal stability with an extended operating temperature range up to 175°C.

Applications

• Voltage regulation in general-purpose electronic circuits
• Overvoltage protection for sensitive components
• Reference voltage generation in power supply designs

Procurement Notes

Verify that the specific suffix indicates tin/lead plating, as RoHS compliance may vary by manufacturer lot or specific ordering code. Confirm the exact packaging format, such as bulk or tape and reel, matches the assembly requirements. Ensure the requested part number aligns with the 1W power rating and 51V specification to avoid substitution errors during procurement.

Selection Notes

Select this component when a standard 51 V Zener diode is required for through-hole applications. The DO-41 package offers mechanical durability suitable for industrial environments. Consider the 95 Ω dynamic impedance for noise-sensitive designs and verify that the 1 W power rating accommodates the expected surge currents in the target application circuit.

Part Context

This component belongs to the widely used 1N47 series of Zener diodes, which covers a broad spectrum of voltage ratings from 3.3 V to 100 V. The 1N4757A specifically targets the 51 V segment of this lineup. Central Semiconductor manufactures these devices using silicon planar technology, ensuring consistent performance across the series for general-purpose regulation tasks.

Replacement Considerations

Equivalent parts include Vishay 1N4757A and Microsemi 1N4757APE3TR. Verify pinout compatibility and ensure the replacement maintains the same 51 V Zener voltage and 1 W power dissipation rating. Check if the alternative package variant meets the thermal and mechanical constraints of the original design.