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1N4902/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)：200 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 1N4902/TR is a temperature-compensated Zener diode manufactured by Microchip Technology. It features a nominal Zener voltage of 12.8 V with a 5% tolerance and operates in the DO-7-2 through-hole package. The device dissipates up to 400 mW, maintains a maximum reverse leakage current of 15 uA, and exhibits 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 for stable voltage regulation across wide thermal variations
- High-temperature capability suitable for demanding industrial environments
- Through-hole construction for reliable mechanical mounting
Applications
- Precision voltage reference circuits requiring thermal stability
- Over-voltage protection in high-temperature electronic systems
- Voltage regulation in industrial control equipment
Procurement Notes
Verify component authenticity through authorized Microchip distributors or direct channels. Confirm the specific suffix matches project requirements. Review the official datasheet for detailed electrical characteristics and handling instructions before integration into designs.
Selection Notes
Select this component when precise voltage regulation is required under significant thermal fluctuations. The through-hole package suits applications prioritizing mechanical robustness over compact surface-mount layouts. Ensure the 400 mW power dissipation rating aligns with circuit load conditions.
Part Context
This part belongs to Microchip's legacy discrete semiconductor portfolio, specifically within the Zener diode category. It serves as a specialized voltage reference solution designed for reliability in harsh operating conditions where standard diodes may exhibit unacceptable drift.
Replacement Considerations
Consult official Microchip documentation for verified cross-reference part numbers. Do not substitute with generic equivalents without validating electrical parameters against the original specifications.
