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1N4746A-T
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Product Detailed Parameters
- Description：DIODE ZENER 18V 1W DO41
- Series：-
- Mfr：Diodes Incorporated
- Package：Tape & Reel (TR),Cut Tape (CT)
- Voltage - Zener (Nom) (Vz)：18 V
- Tolerance：±5%
- Power - Max：1 W
- Impedance (Max) (Zzt)：20 Ohms
- Current - Reverse Leakage @ Vr：5 µA @ 13.7 V
- Operating Temperature：-65°C ~ 175°C
- Mounting Type：Through Hole
- Package / Case：DO-204AL, DO-41, Axial
- Voltage - Forward (Vf) (Max) @ If：1.2 V @ 200 mA
- Grade：-
- Qualification：-
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Overview
The Diodes Incorporated 1N4746A-T is a 1.0 W Zener diode with an 18 V nominal voltage and ±5% tolerance, housed in a DO-41 glass package. It operates within a temperature range of -65°C to +175°C, featuring a maximum reverse leakage current of 5 µA at 13.7 V and a test current of 14 mA. The device supports a surge current of 250 mA (8.3 ms) and has a thermal resistance of 175 °C/W.
Feature Summary
- Provides stable voltage regulation using a unidirectional silicon Zener junction.
- Constructed with a glass DO-41 case for high-temperature stability and UL flammability rating.
- Features lead-free finish compliant with RoHS directives.
Applications
- Voltage reference circuits
- Overvoltage protection
- Clipping and clamping applications
Procurement Notes
Verify the specific ordering suffix '-T' corresponds to tape and reel packaging as documented by Diodes Incorporated. Confirm that the component meets the required environmental standards and check for any design-in restrictions noted in official documentation.
Selection Notes
Select this component when a 18 V Zener voltage with 1 W power dissipation is required in a through-hole DO-41 package. Ensure the operating environment stays within the specified -65°C to +175°C range and consider the 5% voltage tolerance for precision requirements.
Part Context
This part belongs to the 1N47xx series of 1.0 W Zener diodes manufactured by Diodes Incorporated. The series covers a wide voltage range from 3.3 V to 75 V, utilizing standard DO-41 glass encapsulation for robust performance in various electronic applications.
Replacement Considerations
Diodes Incorporated recommends using the DFLZxx series for new designs instead of this legacy product line. Verify compatibility with existing circuit parameters if substituting with other manufacturers' equivalents.
FAQ
What does the '-T' suffix indicate for this part number?
The '-T' suffix indicates that the device is shipped in Tape & Reel packaging, specifically 5K per reel.
Is this component suitable for life support devices?
No, Diodes Incorporated explicitly states that these products are not authorized for use as critical components in life support devices without written approval.
