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1N4748AH
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Product Detailed Parameters
- Description：DIODE ZENER 22V 1W DO204AL
- Series：-
- Mfr：Taiwan Semiconductor Corporation
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：22 V
- Tolerance：±5%
- Power - Max：1 W
- Impedance (Max) (Zzt)：23 Ohms
- Current - Reverse Leakage @ Vr：5 µA @ 16.7 V
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Through Hole
- Package / Case：DO-204AL, DO-41, Axial
- Voltage - Forward (Vf) (Max) @ If：-
- Grade：Automotive
- Qualification：AEC-Q101
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Overview
The 1N4748AH is a single silicon Zener diode manufactured by Taiwan Semiconductor Corporation, designed for through-hole mounting in DO-204AL (DO-41) axial packages. It features a nominal Zener voltage of 22 V with a tolerance of 5% and a power dissipation rating of 1 W. The device operates within a temperature range of -55°C to 150°C junction temperature and is qualified under AEC-Q101 standards for automotive applications. Key electrical characteristics include a maximum reverse leakage current of 100 nA, a Zener impedance of 23 Ohms at a test current of 11.5 mA, and a forward voltage of 1.2 V.
Feature Summary
- Automotive-grade reliability certified under AEC-Q101 standards
- Glass passivated chip construction for enhanced stability
- Hermetically sealed design with double stud technology
Applications
- Voltage regulation circuits
- Signal clipping and limiting
- Circuit bypassing
Procurement Notes
Verify the specific suffix AH indicates AEC-Q101 automotive qualification when sourcing from different manufacturers. Confirm package dimensions match DO-204AL specifications for PCB footprint compatibility. Ensure thermal derating calculations account for the 150°C junction limit during high-power operation.
Selection Notes
Select this component for applications requiring robust voltage reference stability in automotive environments. Compare against standard industrial grades if automotive certification is unnecessary to optimize cost. Verify that the 22 V breakdown voltage aligns precisely with the target circuit requirements before integration.
Part Context
This part belongs to the 1N47xx series of glass-passivated Zener diodes. It shares physical and electrical similarities with parts like 1N4748A but distinguishes itself through automotive qualification. The series covers a wide voltage range from 3.3 V to 82 V in the same DO-41 package form factor.
Replacement Considerations
Direct substitutes include 1N4748A from other manufacturers, provided automotive qualification is not strictly required. Cross-reference with 1N4748-G for basic functional equivalence in non-automotive contexts.
