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1N4742APE3/TR8
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Product Detailed Parameters
- Description：DIODE ZENER 12V 1W DO204AL
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：12 V
- Tolerance：±5%
- Power - Max：1 W
- Impedance (Max) (Zzt)：9 Ohms
- Current - Reverse Leakage @ Vr：5 µA @ 9.1 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 1N4742APE3/TR8 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, housed in a plastic DO-41 (DO-204AL) axial-lead package. It provides voltage regulation with a nominal Zener voltage of 12 V and a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and features RoHS-compliant annealed matte-tin plating on its terminals.
Feature Summary
- Provides stable voltage regulation across a broad operating current and temperature range
- Features flexible axial-lead mounting terminals for standard PCB integration
- Constructed with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
- Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020
Applications
- Voltage reference circuits requiring precise potential levels
- Overvoltage protection stages in power supply designs
- General-purpose voltage regulation tasks in electronic systems
Procurement Notes
Verify that the ordering suffix matches the required tape and reel packaging configuration. Confirm the specific manufacturer designation, as this component originates from the Microsemi Scottsdale Division now part of Microchip Technology. Ensure compliance requirements align with the RoHS-compliant e3 suffix specifications provided in the official datasheet documentation.
Selection Notes
Select this component when a 12 V regulated output is required in an axial-lead form factor. Consider the 1 W power dissipation capability and the specific test current of 21 mA for circuit design calculations. Evaluate the thermal resistance characteristics relative to the intended mounting environment and lead length constraints.
Part Context
This device belongs to the widely recognized 1N47xxA series of silicon Zener diodes. The 'P' suffix indicates plastic encapsulation, which offers lower thermal resistance compared to glass-body options. The 'e3' suffix denotes RoHS compliance, while 'TR8' specifies the tape and reel packaging format for automated assembly processes.
Replacement Considerations
Consult the factory for surface mount equivalents such as SMAJ4742A or MLL4742A. Other manufacturers producing JEDEC registered 1N4742A devices may serve as functional substitutes if electrical parameters and package dimensions are verified.
