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1N4909/TR
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Product Detailed Parameters
- Description：DIODE ZENER 12.8V 400MW DO7
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- 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 1N4909/TR is a temperature-compensated Zener diode designed for precision voltage reference applications. It features a nominal Zener voltage of 12.8 V with a tolerance of ±5%. The component is rated for a maximum power dissipation of 400 mW and operates within an extended temperature range from -65 °C to +175 °C. It utilizes a DO-7 (DO-204AA) axial through-hole package and is supplied in tape and reel packaging.
Feature Summary
- Temperature compensated design ensures stable voltage regulation across wide thermal variations
- High reliability construction suitable for demanding industrial environments
- Precision voltage reference capability with tight tolerance specifications
Applications
- Precision voltage reference circuits
- Temperature compensation networks
- Industrial control systems requiring stable references
Procurement Notes
Verify the manufacturer part number 1N4909/TR against official Microchip Technology documentation to confirm authenticity. Ensure the package type matches the required DO-7 axial form factor. Confirm that the tape and reel packaging aligns with automated assembly requirements. Check for any specific handling instructions related to electrostatic discharge protection during storage and installation.
Selection Notes
Select this component when a stable, temperature-compensated voltage reference is required in through-hole designs. The 12.8 V nominal voltage and 400 mW power rating define its operational limits. Consider the extended temperature range of -65 °C to +175 °C for harsh environment applications. Verify compatibility with existing circuit impedance and current requirements before integration.
Part Context
This component belongs to the family of single Zener diodes manufactured by Microchip Technology. It is specifically engineered as a temperature-compensated device, distinguishing it from standard Zener diodes by offering improved stability over varying thermal conditions. The 1N4909 designation indicates a specific voltage class within this specialized series.
Replacement Considerations
Consult official Microchip Technology substitution guides for verified equivalents. Generic Zener diodes may not provide the same temperature compensation characteristics or extended operating temperature range.
