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1N4737ATR
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Product Detailed Parameters
- Description：DIODE ZENER 7.5V 1W DO41
- Series：-
- Mfr：Fairchild Semiconductor
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：7.5 V
- Tolerance：±5%
- Power - Max：1 W
- Impedance (Max) (Zzt)：4 Ohms
- Current - Reverse Leakage @ Vr：10 µA @ 5 V
- Operating Temperature：-65°C ~ 200°C
- Mounting Type：Through Hole
- Package / Case：DO-204AL, DO-41, Axial
- Voltage - Forward (Vf) (Max) @ If：-
- Grade：-
- Qualification：-
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Overview
The Fairchild Semiconductor 1N4737ATR is a silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 7.5V with a tolerance of 5%. The device is rated for a maximum power dissipation of 1W and utilizes the DO-41 axial leaded glass package. It operates within a temperature range from -65°C to +200°C, ensuring reliability in demanding environments.
Feature Summary
- Provides stable voltage regulation through unidirectional Zener breakdown characteristics
- Utilizes hermetically sealed glass construction for environmental protection
- Supports high thermal stability with an extended operating temperature range
Applications
- Voltage reference circuits requiring precise potential levels
- Overvoltage protection stages in electronic systems
- General-purpose voltage regulation in power supplies
Procurement Notes
Verify the manufacturer marking and date code against official Fairchild or onsemi documentation, as production rights may have transferred. Confirm the specific suffix 'ATR' aligns with the required reel packaging specifications. Ensure compliance with RoHS directives if applicable to the target assembly process. Cross-reference datasheet revisions to confirm parameter consistency.
Selection Notes
Select this component when a 7.5V regulation point is required with 1W power handling capability. The DO-41 package suits through-hole mounting strategies. Consider the 5% voltage tolerance for circuit precision requirements. Evaluate the thermal management needs given the 1W dissipation rating and ambient operating conditions.
Part Context
This part belongs to the standard 1N47xxA series of one-watt Zener diodes. These components are widely used in discrete semiconductor designs for basic voltage clamping and referencing. The 1N4737A variant specifically targets the 7.5V market segment within the broader family of axial-lead regulators.
Replacement Considerations
Equivalent parts include Vishay 1N4737A-TR and Microchip 1N4737AUR/TR. Verify pinout compatibility and electrical parameters such as dynamic impedance and leakage current before substitution.
