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Product Detailed Parameters
- Description：DIODE ZENER ARRAY 27V SOT-363
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Bulk
- Configuration：3 Independent
- Voltage - Zener (Nom) (Vz)：27 V
- Tolerance：±5%
- Power - Max：200 mW
- Impedance (Max) (Zzt)：41 Ohms
- Current - Reverse Leakage @ Vr：100 nA @ 21 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 CMKZ5254B BK is a surface mount triple isolated silicon Zener diode from the Central Semiconductor CMKZ5221B series. It houses three independent Zener diodes in an ULTRAmini SOT-363 package with 5% tolerance. The nominal Zener voltage is 28 V, ranging from 26.60 V to 29.40 V at a test current of 4.5 mA. Maximum Zener impedance is 44 Ohms at IZT and 600 Ohms at IZK. Reverse current is limited to 0.1 mA at VR=28 V. Power dissipation is 200 mW, operating temperature ranges from -65°C to +150°C, and thermal resistance is 625°C/W.
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 space-constrained designs
Applications
- Industrial control systems requiring multi-channel voltage reference
- Commercial equipment utilizing compact power management solutions
- Computer hardware needing isolated voltage clamping or regulation
Procurement Notes
This component has been transitioned to End of Life status by Central Semiconductor Corp. Availability is restricted to existing stock only, with no new production scheduled. Buyers should verify current inventory levels with authorized distributors before placing orders. Replacement parts are not officially listed by the manufacturer for this specific part number.
Selection Notes
Select this device when a triple isolated Zener configuration is required in an SOT-363 footprint. Verify that the 28 V nominal voltage and 200 mW total power dissipation meet circuit requirements. Ensure the design accommodates the maximum reverse leakage and impedance specifications at the intended operating temperature range up to 150°C.
Part Context
The CMKZ5254B BK belongs to the CMKZ5221B through CMKZ5261B series, which offers various Zener voltages from 2.4 V to 47 V. All devices in this series share the same ULTRAmini SOT-363 package and triple isolation architecture. The series provides consistent mechanical dimensions and electrical testing conditions across different voltage ratings.
Replacement Considerations
No official replacement part numbers are provided by Central Semiconductor Corp for the CMKZ5254B BK. The manufacturer indicates that no direct substitutes are available within their portfolio for this discontinued item.
FAQ
What is the marking code for the CMKZ5254B?
The marking code for the CMKZ5254B is 1F8T.
What is the maximum forward voltage for each diode in this series?
The maximum forward voltage (VF) is 0.9 V at a forward current (IF) of 10 mA for all types in the series.
What is the lead configuration for the SOT-363 package?
Lead 1 is Anode D1, Lead 2 is Anode D2, Lead 3 is Anode D3, Lead 4 is Cathode D3, Lead 5 is Cathode D2, and Lead 6 is Cathode D1.
