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1N4902A/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：-55°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 1N4902A/TR is a temperature-compensated Zener diode manufactured by Microchip Technology. It features a nominal Zener voltage of 12.8 V with a tight tolerance of 5%. The device operates in the DO-7-2 through-hole package and dissipates up to 400 mW. Key electrical parameters include a maximum reverse leakage current of 15 uA, a Zener impedance of 200 Ohms, and a test current of 1 mA. It exhibits a low voltage temperature coefficient of 0.002 %/C, ensuring stability across temperatures ranging from -65 C to +175 C.
Feature Summary
- Temperature compensated design for enhanced voltage stability
- Low voltage temperature coefficient of 0.002 %/C
- High operating temperature capability up to +175 C
Applications
- Precision voltage reference circuits
- Temperature-stable power supply regulation
- Calibration equipment references
Procurement Notes
Verify component authenticity against official Microchip Technology documentation. Confirm the specific suffix /TR indicates reel packaging. Check for RoHS compliance status as indicated in product specifications. Ensure the DO-7-2 package matches board layout requirements before procurement.
Selection Notes
Select this component when high thermal stability is required for voltage regulation. The 12.8 V rating suits specific reference needs. Verify that the 200 Ohm impedance meets circuit sensitivity limits. Ensure the through-hole DO-7-2 package fits the assembly process constraints.
Part Context
This part belongs to Microchip's line of temperature-compensated Zener diodes. These devices are engineered for applications demanding superior voltage stability over wide temperature ranges compared to standard Zener diodes. The family typically utilizes specialized doping profiles to minimize temperature coefficients.
Replacement Considerations
Substitute only with verified equivalent parts offering identical 12.8 V Zener voltage, 5% tolerance, and comparable temperature coefficients. Ensure replacement components support the same 400 mW power dissipation and DO-7-2 package form factor.
