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1N4737A-T
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Product Detailed Parameters
- Description：DIODE ZENER 7.5V 1W DO41
- Series：-
- Mfr：Diodes Incorporated
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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 ~ 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 1N4737A-T is a discontinued 1.0W silicon Zener diode housed in a DO-41 glass package. It provides a nominal Zener voltage of 7.5V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +175°C and features a maximum dynamic impedance of 700Ω at knee current. Electrical characteristics include a test current of 34mA, a maximum reverse leakage current of 10µA at 5V, and a thermal resistance of 175°C/W.
Feature Summary
- Hermetically sealed glass construction for environmental stability
- Standardized axial lead configuration for through-hole mounting
- Defined thermal derating curve above 50°C ambient temperature
Applications
- Voltage regulation circuits requiring stable reference levels
- Overvoltage protection for sensitive electronic components
- Clamping applications in power supply designs
Procurement Notes
This component is officially marked as obsolete and discontinued by the manufacturer. No alternate part numbers are provided in the datasheet. Verification of availability must rely on secondary market sources or legacy stock, as direct procurement from Diodes Incorporated is no longer supported.
Selection Notes
Designers should note that this specific variant is discontinued. Selection requires identifying equivalent active parts from other manufacturers or alternative series within the same family that maintain identical electrical parameters and mechanical dimensions to ensure compatibility.
Part Context
The 1N4737A belongs to the 1N4728A through 1N4761A series of 1-watt Zener diodes. This series covers a wide voltage range from 3.3V to 75V. The 'T' suffix indicates tape and reel packaging, while the base model utilizes a DO-41 glass case suitable for general-purpose voltage regulation tasks.
Replacement Considerations
The datasheet explicitly states there is no alternate part number available from Diodes Incorporated. Replacement requires sourcing cross-manufactured equivalents that match the 7.5V rating, 1W power dissipation, and DO-41 package constraints.
