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1N4905
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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)：100 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 1N4905/TR is a temperature-compensated Zener diode designed for precision voltage regulation. It features a nominal Zener voltage of 12.8 V with a tight tolerance of 5%. The device operates in a DO-7-2 through-hole package, dissipating up to 400 mW. Key electrical parameters include a maximum reverse leakage current of 15 uA and a Zener impedance of 100 Ohms at a test current of 2 mA. It supports an extended operating temperature range from -65 C to +175 C.
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 narrow working-voltage tolerances
Applications
- General regulation and voltage reference functions
- Over-voltage protection circuits
- Temperature sensitive electronic systems requiring stable biasing
Procurement Notes
Verify the specific suffix /TR indicates reel packaging when ordering. Confirm RoHS status as non-compliant based on available data. Ensure the DO-7-2 through-hole package matches the target PCB footprint. Validate that the 12.8 V Zener voltage aligns with circuit requirements before procurement.
Selection Notes
Select this component for applications requiring high-temperature stability and precise voltage referencing. The 12.8 V rating suits mid-range regulation needs. Consider the 400 mW power dissipation limit for thermal management. The through-hole format is appropriate for prototyping or robust mechanical mounting scenarios.
Part Context
This part belongs to the standard Zener diode category within Microchip's discrete semiconductor portfolio. It utilizes the legacy 1N4905 designation, ensuring compatibility with established designs. The device serves as a fundamental passive component for voltage clamping and reference generation in analog circuits.
Replacement Considerations
Cross-reference with other manufacturers offering 1N4905 equivalents. Verify pinout compatibility and package dimensions (DO-7-2). Ensure replacement parts meet the same temperature compensation and voltage tolerance specifications.
