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1N4746A BK TIN/LEAD
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Product Detailed Parameters
- Description：18V 1W TH DIODE-ZENER SINGLE: ST
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Box
- Voltage - Zener (Nom) (Vz)：18 V
- Tolerance：±5%
- Power - Max：1 W
- Impedance (Max) (Zzt)：20 Ohms
- Current - Reverse Leakage @ Vr：5 µA @ 13.7 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 1N4746A BK TIN/LEAD is a single silicon Zener diode designed for through-hole mounting in the DO-41 axial leaded package. It provides a nominal Zener voltage of 18 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1 W and operates within a temperature range of -65°C to +200°C. Key electrical characteristics include a maximum reverse leakage current of 5 µA, a Zener impedance of 20 Ohms, and a test current of 14 mA.
Feature Summary
- Provides stable voltage regulation at a nominal 18 V reference level
- Engineered for high thermal stability with an extended operating temperature range up to +200°C
- Constructed using silicon technology for reliable unidirectional conduction
Applications
- Voltage regulation circuits requiring precise 18 V reference levels
- Overvoltage protection for sensitive electronic components
- Clamping applications in analog signal processing systems
Procurement Notes
Verify that the specific ordering suffix matches the required terminal finish and packaging configuration. Confirm compliance with RoHS directives if lead-free materials are mandatory for the assembly process. Ensure the DO-41 package dimensions align with the target PCB footprint requirements before finalizing procurement orders.
Selection Notes
Select this component when a robust 1 W axial Zener diode is required for high-temperature environments. The 18 V rating suits applications needing moderate voltage clamping. Verify that the 20 Ohm impedance meets the dynamic regulation needs of the circuit design. Consider the through-hole mounting style for mechanical stability in industrial settings.
Part Context
This part belongs to the standard 1N47xx series of Zener diodes manufactured by Central Semiconductor Corp. These devices are widely used in general-purpose electronics for voltage reference and protection. The DO-41 package offers a balance of power handling and compact size for axial leaded implementations.
Replacement Considerations
Cross-reference with other manufacturers offering the 1N4746A specification. Verify pinout compatibility and ensure equivalent electrical parameters such as voltage tolerance and power dissipation are maintained during substitution.
