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1N4738A BK TIN/LEAD
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Product Detailed Parameters
- Description：8.2V 1W TH DIODE-ZENER SINGLE: S
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Box
- Voltage - Zener (Nom) (Vz)：8.2 V
- Tolerance：±5%
- Power - Max：1 W
- Impedance (Max) (Zzt)：4.5 Ohms
- Current - Reverse Leakage @ Vr：10 µA @ 6 V
- Operating Temperature：-65°C ~ 200°C (TJ)
- 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 1N4738A BK TIN/LEAD is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 8.2 V with a tolerance of ±5%. The device operates in a DO-41 axial through-hole package and dissipates up to 1 W of power. Key electrical characteristics include a maximum reverse leakage current of 5 µA at 32.7 V and a dynamic impedance of 125 Ω. It supports a wide operating temperature range from -65°C to +200°C.
Feature Summary
- Provides stable voltage regulation within a 3.3 V to 100 V selection range using the 1N47xx series architecture.
- Features hermetic-sealed glass encapsulation for enhanced environmental protection and reliability.
- Supports high junction temperatures up to +200°C for demanding thermal environments.
Applications
- Voltage reference circuits requiring precise potential levels
- Overvoltage protection stages in electronic systems
- General-purpose voltage regulation in power supplies
Procurement Notes
Verify that the specific ordering suffix matches the required lead-free or tin/lead plating specification, as this affects compliance status. Confirm the package type is DO-41 and the power rating is 1 W. Ensure the manufacturer is Central Semiconductor Corp to guarantee the specified hermetic seal quality and temperature ratings are met.
Selection Notes
Select this component when a 1 W through-hole Zener diode with a glass body is required. It is suitable for designs needing tight voltage tolerances and high-temperature operation. Consider the DO-41 package dimensions for PCB layout constraints. Verify if RoHS compliance is mandatory, as tin/lead variants may not meet all environmental directives.
Part Context
This part belongs to the popular 1N4728AG through 1N4764AG series of 1.0 W Zener diodes manufactured by Microsemi (formerly Central Semiconductor). The series offers voltage regulation from 3.3 V to 100 V. The 'BK' designation typically indicates bulk packaging, while 'TIN/LEAD' specifies the terminal finish. These devices are known for their robust glass encapsulation compared to plastic alternatives.
Replacement Considerations
Equivalent parts include Vishay 1N4738A-E1 and Fairchild 1N4738ATR. Both offer identical 8.2 V, 1 W specifications in the DO-41 package. Verify pinout compatibility and ensure the replacement meets the same thermal and electrical performance criteria.
