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1N4917A
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Product Detailed Parameters
- Description：DIODE ZENER 19.2V 500MW DO204AH
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：19.2 V
- Tolerance：±5%
- Power - Max：500 mW
- Impedance (Max) (Zzt)：600 Ohms
- Current - Reverse Leakage @ Vr：-
- Operating Temperature：-55°C ~ 100°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 1N4917A is a temperature-compensated Zener diode designed for precision voltage reference applications. It features a nominal Zener voltage of 19.2V and a power dissipation rating of 500mW. The device is housed in the DO-35 (DO-204AE) axial leaded package, suitable for through-hole mounting. It exhibits low noise characteristics, making it ideal for sensitive analog circuits requiring stable reference voltages across varying temperatures.
Feature Summary
- Temperature-compensated design ensures stable voltage reference performance over operating temperature ranges
- Low noise characteristic minimizes signal interference in precision analog applications
- Robust 500mW power dissipation capability supports reliable operation in standard circuit configurations
Applications
- Precision voltage reference sources in measurement instruments
- Temperature-compensated oscillator circuits
- Low-noise power supply regulation stages
Procurement Notes
Verify the manufacturer marking matches Microchip Technology specifications. Confirm the package type is DO-35 and the Zener voltage tolerance aligns with design requirements. Ensure the component is RoHS compliant if required by your assembly process. Check for any specific lot traceability needs.
Selection Notes
Select this component when a stable, low-noise 19.2V reference is needed in an axial package. Consider the 500mW power limit and thermal management requirements. Compare against other Zener diodes if higher current or different voltage levels are required. Verify temperature coefficient specifications match the application's stability needs.
Part Context
The 1N4917A belongs to the family of temperature-compensated Zener diodes, distinct from standard Zener types due to its optimized noise and temperature stability. It serves as a critical reference element in analog signal processing chains where voltage drift must be minimized.
Replacement Considerations
Substitutes must match the 19.2V Zener voltage, 500mW power rating, DO-35 package, and temperature compensation characteristics. Verify electrical parameters such as impedance and noise levels before replacement.
