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1N4743P/TR8
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Product Detailed Parameters
- Description：DIODE ZENER 13V 1W DO204AL
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：13 V
- Tolerance：±10%
- Power - Max：1 W
- Impedance (Max) (Zzt)：10 Ohms
- Current - Reverse Leakage @ Vr：5 µA @ 9.9 V
- Operating Temperature：-65°C ~ 150°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 Microchip Technology 1N4743P/TR8 is a silicon 1.0-watt Zener diode in the JEDEC registered 1N4728A to 1N4764A series. It provides voltage regulation at a nominal 13V with a standard 5% tolerance, indicated by the 'A' suffix. The device utilizes a plastic DO-41 (DO-204AL) axial-lead package, designated by the 'P' suffix for lower thermal resistance compared to glass-body options. Electrical characteristics include a maximum dynamic impedance of 10 ohms at a test current of 19 mA and a maximum reverse leakage current of 5 µA at 9.9V. It operates within a temperature range of -65°C to +150°C.
Feature Summary
- Provides stable voltage regulation across a broad operating current and temperature range
- Features flexible axial-lead mounting terminals suitable for through-hole applications
- Plastic encapsulated body offers lower thermal resistance compared to glass-body equivalents
- Moisture classification is Level 1 per IPC/JEDEC J-STD-020B requiring no dry pack
Applications
- Voltage regulation circuits
- Reference voltage sources
- Overvoltage protection
Procurement Notes
Verify the specific manufacturer origin, as the 1N4743P/TR8 part number originates from Microsemi's Scottsdale Division, which has undergone corporate restructuring and acquisition by Microchip Technology. Confirm that the component meets all required electrical specifications and packaging standards for your application before procurement.
Selection Notes
Select this component when a 13V Zener reference is required in a through-hole configuration. The plastic construction ensures robustness and ease of handling without moisture sensitivity concerns. Ensure the circuit design accommodates the specified power dissipation limits and thermal resistance values under steady-state conditions.
Part Context
This component belongs to the widely used 1N47xx series of 1-watt Zener diodes. The 'P' suffix specifically denotes the plastic DO-41 package variant, distinguishing it from glass-bodied versions. The 'TR8' suffix indicates tape and reel packaging, facilitating automated assembly processes.
Replacement Considerations
Surface mount equivalents are available as SMAJ4743 or MLL4743. Other manufacturers produce compatible parts under the same JEDEC designation, provided they meet the 1W power rating and 13V nominal voltage requirements.
