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1N4908
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Product Detailed Parameters
- Description：DIODE ZENER 12.8V 400MW DO7
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：12.8 V
- Tolerance：±5%
- Power - Max：400 mW
- Impedance (Max) (Zzt)：50 Ohms
- Current - Reverse Leakage @ Vr：-
- Operating Temperature：-25°C ~ 100°C
- Mounting Type：Through Hole
- Package / Case：DO-204AA, DO-7, Axial
- Voltage - Forward (Vf) (Max) @ If：-
- Grade：-
- Qualification：-
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Overview
The Microchip Technology 1N4908 is a temperature compensated Zener reference diode designed for precision voltage regulation applications. It features a nominal Zener voltage of 12.8 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 400 mW and operates within a standard temperature range. Packaged in the DO-7 axial leaded through-hole format, it provides stable reference performance suitable for circuits requiring low noise and high accuracy.
Feature Summary
- Temperature compensated design ensures stable voltage reference across operating ranges
- Low noise characteristics for precision analog circuit applications
- Through-hole DO-7 package for reliable board mounting
Applications
- Precision voltage reference sources
- Temperature compensated regulator circuits
- Low noise analog signal conditioning
Procurement Notes
Verify the specific manufacturer source, as multiple entities including Microchip, Microsemi, and Digitron produce this part number. Confirm RoHS compliance status if required, noting that non-RoHS versions may exist. Ensure the DO-7 package and 12.8 V specification match the design requirements before procurement.
Selection Notes
Select this component when a stable 12.8 V reference is needed with minimal temperature drift. The 400 mW power rating supports moderate current loads. Consider the DO-7 package constraints for PCB layout. Verify that the ±5% tolerance meets the system's accuracy requirements compared to tighter tolerance alternatives.
Part Context
This component belongs to the family of temperature compensated Zener diodes, often referred to as BZX series equivalents or low-noise references. These devices utilize specific doping profiles to minimize the temperature coefficient near the knee voltage, providing superior stability compared to standard Zener diodes in the same voltage range.
Replacement Considerations
Public confirmed substitutes include the 1N4896. Verify pinout compatibility and electrical specifications such as voltage tolerance and power dissipation before substitution.
