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1N4781
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Product Detailed Parameters
- Description：DIODE ZENER 8.5V 500MW DO204AH
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：8.5 V
- Tolerance：±5%
- Power - Max：500 mW
- Impedance (Max) (Zzt)：100 Ohms
- Current - Reverse Leakage @ Vr：-
- Operating Temperature：0°C ~ 75°C
- Mounting Type：Through Hole
- Package / Case：DO-204AH, DO-35, Axial
- Voltage - Forward (Vf) (Max) @ If：-
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Overview
The Microchip Technology 1N4781 is a Zener diode 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 operates within a temperature range of -55°C to +100°C. The component utilizes through-hole mounting in a DO-35 axial package.
Feature Summary
- Provides stable voltage regulation at a nominal 8.5 V level
- Constructed with a glass passivated junction for reliability
- Designed for through-hole PCB integration
Applications
- General purpose voltage reference circuits
- Overvoltage protection stages
- Biasing networks for transistor amplifiers
Procurement Notes
Verify the specific manufacturer source, as the 1N4781 designation is historically associated with multiple semiconductor producers. Confirm that the supplied unit matches the required 8.5 V Zener voltage and 500 mW power rating specifications. Ensure the package type corresponds to the DO-35 axial form factor required for your assembly process before finalizing orders.
Selection Notes
Select this component when an 8.5 V regulation point is required in a low-power through-hole design. The 500 mW power rating limits its use to applications where current draw remains within safe operating boundaries. Consider the ±5% voltage tolerance for precision requirements and ensure the operating environment stays within the specified temperature range.
Part Context
This part belongs to the standard 1N47xx series of Zener diodes, widely used for basic voltage regulation tasks. The 1N4781 specifically targets the 8.5 V segment of this family. These components are fundamental building blocks in analog electronics, offering a cost-effective solution for establishing fixed potential levels in DC circuits.
Replacement Considerations
Compatible substitutes include other manufacturers' 1N4781 variants or equivalent Zener diodes with matching 8.5 V ratings and 500 mW power capabilities in the DO-35 package.
