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1N4749P/TR8
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Product Detailed Parameters
- Description：DIODE ZENER 24V 1W DO204AL
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：24 V
- Tolerance：±10%
- Power - Max：1 W
- Impedance (Max) (Zzt)：25 Ohms
- Current - Reverse Leakage @ Vr：5 µA @ 18.2 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 1N4749P/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 24 V and a standard tolerance of ±10%. The device operates within a temperature range of -65°C to +150°C and features a maximum dynamic impedance of 25 Ohms at a test current of 10.5 mA. It includes a TR suffix for tape and reel packaging.
Feature Summary
- Plastic encapsulated construction offering lower thermal resistance compared to glass-body options
- Moisture classification Level 1 requiring no dry pack storage
- ESD nonsensitive per MIL-STD-750 Method 1020
- Flexible axial-lead mounting terminals
Applications
- Voltage regulation over broad operating current and temperature ranges
- Low voltage stabilizers
- General purpose voltage reference applications
Procurement Notes
Verify that the part number suffix 'TR' corresponds to the tape and reel packaging option as specified in the datasheet. Confirm the manufacturer designation, as this component originates from the Microsemi Scottsdale Division, now part of Microchip Technology. Ensure the specific tolerance requirements align with the standard 10% specification for parts without an additional letter suffix.
Selection Notes
Select this component when a 24 V Zener voltage with 10% tolerance is required in a plastic axial package. Consider the 1.0 W power dissipation capability and the -65°C to +150°C operating temperature range. The plastic body offers advantages in thermal performance over glass equivalents. Verify if tighter tolerances or military screening levels are needed, which require different suffixes or prefixes.
Part Context
This component belongs to the popular 1N4728A through 1N4764A series of 1.0 watt Zener diodes. The series covers a voltage selection from 3.3 to 100 volts. The 'P' suffix specifically designates the plastic molded epoxy body construction, distinguishing it from the glass-body 'G' suffix options available in the same JEDEC numbering system.
Replacement Considerations
Consult factory documentation for surface mount equivalents such as SMAJ4749A or MLL4749A. Other manufacturers producing JEDEC registered 1N4749A devices may offer compatible replacements, provided the package style and electrical parameters match.
