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1N4742A BK TIN/LEAD
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Product Detailed Parameters
- Description：12V 1W TH DIODE-ZENER SINGLE: ST
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Box
- Voltage - Zener (Nom) (Vz)：12 V
- Tolerance：±5%
- Power - Max：1 W
- Impedance (Max) (Zzt)：9 Ohms
- Current - Reverse Leakage @ Vr：5 µA @ 9.1 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 1N4742A 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 12 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1 W and operates within a junction temperature range of -65°C to +200°C. Key electrical characteristics include a maximum reverse leakage current of 5 µA, a Zener impedance of 125 Ω, and a test current of 4 mA.
Feature Summary
- Provides stable voltage regulation at a nominal 12 V reference level
- Features sharp reverse breakdown characteristics for precise clamping
- Constructed with high-reliability silicon technology
- Designed for robust performance across extended temperature ranges
Applications
- Voltage reference circuits requiring stable DC levels
- Overvoltage protection for sensitive electronic components
- Clamping applications in signal processing paths
- Power supply regulation stages
Procurement Notes
Verify that the specific ordering suffix matches the required terminal finish and packaging format. Confirm RoHS compliance status as tin/lead variants may differ from lead-free equivalents. Ensure the DO-41 package dimensions align with the target PCB footprint. Cross-reference the manufacturer part number against official datasheets to confirm electrical parameters before finalizing procurement orders.
Selection Notes
Select this component when a 12 V regulation point is required with a 1 W power rating. The DO-41 package is suitable for manual or standard automated through-hole assembly processes. Consider the 125 Ω impedance value for dynamic load requirements. Verify that the operating environment stays within the specified -65°C to +200°C junction temperature limits for reliable long-term operation.
Part Context
This component belongs to the widely recognized 1N47xx series of axial leaded Zener diodes. These devices are standard industry replacements for various voltage regulation needs. The 1N4742A designation specifically identifies the 12 V variant within this family, offering consistent performance across different manufacturers while maintaining standardized pinouts and mechanical dimensions.
Replacement Considerations
- 1N4742A
- CZ5342B
FAQ
What is the maximum power dissipation rating?
The maximum power dissipation is 1 W.
What is the Zener impedance value?
The Zener impedance is 125 Ω.
What is the maximum operating junction temperature?
The maximum operating junction temperature is +200°C.
