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1N4746A R1G
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Product Detailed Parameters
- Description：DIODE ZENER 18V 1W DO204AL
- Series：-
- Mfr：Taiwan Semiconductor Corporation
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：18 V
- Tolerance：±5%
- Power - Max：1 W
- Impedance (Max) (Zzt)：40 Ohms
- Current - Reverse Leakage @ Vr：5 µA @ 13.7 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：-
- Qualification：-
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Overview
The Taiwan Semiconductor 1N4746A R1G is a single-channel Zener voltage regulator diode designed for through-hole mounting in DO-41 packages. It features a nominal Zener voltage of 18 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1 W and operates within a temperature range of -65°C to +200°C. Key electrical parameters include a test current of 14 mA, a maximum Zener impedance of 20 Ω, and a maximum reverse leakage current of 5 μA.
Feature Summary
- Hermetically sealed glass construction for environmental protection
- High thermal stability supporting extended operating temperatures up to 200°C
- Low leakage current characteristics for precise voltage regulation
Applications
- Voltage reference circuits
- Overvoltage protection systems
- Clamping applications in electronic equipment
Procurement Notes
Verify the specific suffix 'R1G' against official Taiwan Semiconductor documentation to confirm reel packaging specifications. Ensure compatibility with standard DO-41 footprints during integration. Cross-reference datasheets from authorized distributors to validate current availability status and manufacturing origin details before procurement.
Selection Notes
Select this component when a robust 18 V regulation point is required in high-temperature environments. The DO-41 package offers reliable axial lead termination for general-purpose PCB assembly. Consider the 1 W power rating for thermal management requirements in dense circuit layouts.
Part Context
This part belongs to the standard 1N47xx series of Zener diodes widely used in industrial electronics. The 1N4746A designation specifically targets the 18 V segment of this family. Taiwan Semiconductor manufactures these components utilizing established silicon planar technology for consistent performance across production batches.
Replacement Considerations
Compatible substitutes include the onsemi 1N4746A and Vishay 1N4746A. Both manufacturers offer identical electrical specifications and DO-41 packaging. Verify pinout orientation and thermal resistance values when transitioning between suppliers.
