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Product Detailed Parameters
- Description：DIODE ZENER ARRAY 4.3V SOT-363
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Bulk
- Configuration：3 Independent
- Voltage - Zener (Nom) (Vz)：4.3 V
- Tolerance：±5%
- Power - Max：200 mW
- Impedance (Max) (Zzt)：22 Ohms
- Current - Reverse Leakage @ Vr：5 µA @ 1 V
- Operating Temperature：-65°C ~ 150°C (TJ)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- pa_package-case：
- Supplier Device Package：SOT-363
- Voltage - Forward (Vf) (Max) @ If：900 mV @ 10 mA
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Overview
The CMKZ5229B BK is a surface mount triple isolated silicon Zener diode from the Central Semiconductor CMKZ5221B series, packaged in an ULTRAmini SOT-363 case. It contains three independent Zener diodes with a nominal voltage of 4.3V and a tolerance of ±5%. Each diode operates at a test current of 20mA, featuring a maximum dynamic impedance of 22Ω and a knee impedance of 2000Ω. The device has a power dissipation rating of 200mW per diode and supports junction temperatures from -65°C to +150°C.
Feature Summary
- Triple isolated silicon Zener diodes integrated into a single compact surface mount package
- Designed for industrial, commercial, entertainment, and computer applications
- Provides independent voltage regulation for multiple circuits within limited board space
Applications
- Industrial control systems requiring multi-channel voltage reference
- Commercial equipment needing compact power supply regulation
- Computer hardware utilizing space-constrained logic level shifting
Procurement Notes
This component is classified as End of Life (EOL) by Central Semiconductor Corp. Availability is restricted to existing stock only, with no new production scheduled. Buyers should verify supplier inventory levels carefully before ordering, as continuous supply cannot be guaranteed. Last purchase orders may be subject to specific deadlines defined by the manufacturer's discontinuation notice.
Selection Notes
Select this part when a design requires three isolated Zener references in a minimal footprint. Verify that the 4.3V nominal voltage and 20mA test current align with circuit requirements. Ensure the SOT-363 package dimensions fit the PCB layout constraints. Consider the EOL status and potential need for long-term supply agreements or alternative sourcing strategies during the procurement phase.
Part Context
The CMKZ5229B BK belongs to the CMKZ5221B through CMKZ5261B series, which offers various Zener voltages ranging from 2.4V to 47V in the same triple-isolated SOT-363 package. This series allows designers to standardize on a single package type while selecting different voltage combinations for complex multi-rail power distribution networks in dense electronic assemblies.
Replacement Considerations
No direct replacement part numbers are available from Central Semiconductor for this discontinued series. The manufacturer indicates 'N/A, Stock Only' for all variants in the CMKZ5221B-BK/TR range. Engineers must identify third-party equivalents or redesign using discrete components if future production continuity is required.
