1N4783A

Overview

The 1N4783A is a silicon Zener diode manufactured by Microchip Technology, designed for voltage regulation applications. It features a nominal Zener voltage of 8.5 V with a tolerance of ±5%. The device has a maximum power dissipation of 500 mW and a maximum Zener impedance of 100 Ohms. It is housed in a DO-35 axial through-hole package and operates within a temperature range of -55°C to +100°C.

Feature Summary

• Provides stable voltage regulation at a nominal 8.5 V reference level
• Utilizes a hermetically sealed glass axial leaded construction for environmental protection
• Supports continuous power dissipation up to 500 mW

Applications

• General-purpose voltage regulation circuits
• Reference voltage sources in electronic systems
• Overvoltage protection stages

Procurement Notes

Verify the specific manufacturer lot and date code upon receipt to ensure compliance with project requirements. Confirm that the component matches the DO-35 package dimensions and lead finish specifications detailed in the official datasheet. Ensure storage conditions adhere to the manufacturer's guidelines to maintain reliability before soldering.

Selection Notes

Select this component when an 8.5 V regulation point is required in a through-hole design. The 500 mW power rating suits low-current applications. Verify that the ±5% voltage tolerance meets the circuit precision needs. Consider the thermal environment, as the operating range extends to +100°C, which may impact derating calculations in enclosed spaces.

Part Context

This part belongs to the standard 1N47xx series of Zener diodes produced by Microchip Technology. These components are widely used in discrete semiconductor designs requiring reliable voltage clamping or regulation. The 1N4783A specifically addresses the need for an 8.5 V reference in axial packages, fitting into legacy and modern PCB layouts utilizing through-hole technology.

Replacement Considerations

Cross-reference with other manufacturers offering 1N4783A equivalents. Ensure substitute parts match the 8.5 V Zener voltage, 500 mW power rating, and DO-35 package outline. Verify that the replacement maintains similar impedance and leakage characteristics for critical circuit performance.