CMKZ5227B TR

Overview

The CMKZ5227B TR is a surface mount triple isolated silicon Zener diode from the CMKZ5221B series, manufactured by Central Semiconductor Corp. It utilizes an ULTRAmini SOT-363 package containing three independent diodes with a 5% voltage tolerance. Each diode operates at a nominal Zener voltage of 3.6 V (range 3.420 V to 3.780 V) with a test current of 20 mA. Key electrical parameters include a maximum dynamic impedance of 24 Ω at IZT and 1700 Ω at IZK, a maximum reverse current of 15 μA at VR = 1.0 V, and a temperature coefficient of -0.065 %/°C. The device supports a power dissipation of 200 mW and functions within a junction temperature range of -65 °C to +150 °C.

Feature Summary

• Triple isolated configuration integrating three independent Zener diodes in a single compact surface mount package
• Designed for automated assembly processes suitable for industrial, commercial, entertainment, and computer applications
• Provides precise voltage regulation with 5% tolerance across a wide operating temperature range

Applications

• Industrial control systems requiring multiple voltage references
• Commercial equipment needing compact multi-channel regulation
• Computer hardware utilizing space-constrained surface mount designs
• Entertainment electronics requiring stable isolated voltage rails

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to End of Life status. Request original datasheets and material compliance documentation to ensure specifications match design requirements. Confirm marking codes and package integrity upon receipt to validate part identity and condition.

Selection Notes

Select this component when a triple isolated Zener array is required in an SOT-363 footprint. Ensure circuit designs accommodate the specific 3.6 V nominal voltage and 20 mA test current conditions. Verify thermal management capabilities align with the 200 mW power dissipation limit and 625 °C/W thermal resistance characteristics under expected operating loads.

Part Context

This part belongs to the CMKZ5221B through CMKZ5261B series of surface mount triple isolated silicon Zener diodes. The series offers various voltage options within the same SOT-363 package format, allowing designers to standardize on a single footprint while selecting different voltage ratings via suffix codes. The CMKZ5227B specifically provides the 3.6 V variant within this lineup.

Replacement Considerations

Official replacement parts are listed as N/A, Stock Only. No functional substitutes are provided in the manufacturer's discontinuation notice. Designers must evaluate existing inventory levels or seek alternative third-party components that match the SOT-363 package and electrical specifications.

FAQ

What is the marking code for the CMKZ5227B?

The marking code for the CMKZ5227B is 8BCT.

What is the maximum reverse current specified for this diode?

The maximum reverse current is 15 μA, measured at a reverse voltage of 1.0 V.

Does the CMKZ5227B support lead-free plating?

Yes, ordering suffixes such as PBFREE indicate lead-free plated devices available for this series.