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Product Detailed Parameters
- Description：DIODE ZENER ARRAY 28V SOT-363
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Bulk
- Configuration：3 Independent
- Voltage - Zener (Nom) (Vz)：28 V
- Tolerance：±5%
- Power - Max：200 mW
- Impedance (Max) (Zzt)：-
- 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 CMKZ5255B BK is a surface mount triple isolated silicon Zener diode from Central Semiconductor Corp, housed in an ULTRAmini SOT-363 package. It contains three independent Zener diodes with a nominal voltage of 28 V and a tolerance of ±5%. Each diode operates at a test current of 4.5 mA, featuring a maximum dynamic impedance of 44 Ω at IZT and 600 Ω at IZK. The device supports a power dissipation of 200 mW per diode at 25°C, with a thermal resistance of 625 °C/W. Operating temperatures range from -65°C to +150°C.
Feature Summary
- Triple isolated configuration within a single compact SOT-363 surface mount package
- Designed for industrial, commercial, entertainment, and computer applications
- High reliability silicon construction with defined marking codes
Applications
- Industrial circuit protection
- Commercial equipment voltage regulation
- Entertainment system biasing
- Computer application logic levels
Procurement Notes
This component has been officially classified as End of Life (EOL) by Central Semiconductor Corp. Availability is restricted to existing stock only, with no new production scheduled. Buyers must verify the authenticity of remaining inventory through authorized channels. Last purchase orders were subject to specific deadlines outlined in the manufacturer's discontinuation notice.
Selection Notes
Designers should evaluate alternative components due to the EOL status of this part. Verify that replacement candidates match the required 28 V nominal Zener voltage and SOT-363 footprint. Ensure the substitute offers comparable isolation between internal diodes and similar thermal characteristics for reliable operation in space-constrained designs.
Part Context
The CMKZ5255B belongs to the CMKZ5221B series, which encompasses multiple voltage variants ranging from 2.4 V to 47 V. All devices in this series share the same triple-isolated SOT-363 packaging and general electrical structure, differing primarily in their specific Zener voltage ratings and corresponding marking codes.
Replacement Considerations
No direct replacement part numbers are provided by the manufacturer. The official notice indicates 'N/A, Stock Only' for all series members, requiring designers to source third-party equivalents or redesign using currently available components.
FAQ
What is the maximum reverse current for the CMKZ5255B?
The maximum reverse current is 0.1 mA when tested at a reverse voltage of 21 V.
What is the temperature coefficient for this device?
The maximum temperature coefficient is +0.091 %/°C.
How many pins does the SOT-363 package have for this component?
The package utilizes six terminals: three anodes (D1, D2, D3) and three cathodes (D1, D2, D3).
