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1N4728A BK
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Product Detailed Parameters
- Description：DIODE ZENER 3.3V 1W DO41
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：3.3 V
- Tolerance：±5%
- Power - Max：1 W
- Impedance (Max) (Zzt)：10 Ohms
- Current - Reverse Leakage @ Vr：100 µA @ 1 V
- Operating Temperature：-65°C ~ 200°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 Central Semiconductor Corp 1N4728A BK is a silicon Zener diode designed for voltage regulation. It features a DO-41 glass package with a nominal Zener voltage of 3.3 V and a tolerance of ±5%. The device has a maximum power dissipation of 1.0 W at 50°C, a test current of 76 mA, and a maximum reverse leakage current of 100 µA. Operating temperatures range from -65°C to +200°C.
Feature Summary
- Hermetically sealed glass construction in the DO-41 case
- High reliability voltage regulation for industrial applications
- Oxide passivated die for enhanced stability
Applications
- Industrial equipment voltage regulation
- Commercial electronics power supplies
- Entertainment system circuitry
- Computer hardware protection
Procurement Notes
This component is officially classified as End of Life (EOL) by Central Semiconductor Corp. No replacement part numbers are available. Procurement should focus on verifying stock availability or identifying alternative sources through manufacturer engineering support.
Selection Notes
Select this component only if legacy compatibility is required. Verify that the 3.3 V nominal voltage and 1.0 W power rating meet the specific circuit requirements. Confirm that the DO-41 through-hole package fits the design constraints.
Part Context
The 1N4728A belongs to the 1N47 series of 1-watt silicon Zener diodes manufactured by Central Semiconductor. These devices utilize planar technology and are packaged in the standard DO-41 axial leaded format. The series covers a wide voltage range from 3.3V to 100V.
Replacement Considerations
No direct replacement part numbers are provided by the manufacturer. The product is discontinued and marked as End of Life (EOL). Contacting Central Semiconductor engineering may assist in locating alternate sources.
FAQ
Is the 1N4728A currently in production?
No, the 1N4728A BK is classified as End of Life (EOL) by Central Semiconductor Corp.
What is the maximum operating temperature?
The maximum operating and storage junction temperature is +200°C.
