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The CMKZ5241B TR is a surface mount triple isolated silicon Zener diode from Central Semiconductor Corp, packaged in an ULTRAmini SOT-363 case. It contains three independent Zener diodes with a nominal voltage of 11 V and a tolerance of 5%. The device operates within a junction temperature range of -65 to +150 °C and has a maximum power dissipation of 200 mW per diode at 25 °C. Electrical characteristics include a maximum Zener impedance (ZZT) of 22 Ω at a test current (IZT) of 20 mA, and a maximum reverse current (IR) of 2.0 μA at VR = 8.4 V. The thermal resistance (ΘJA) is 625 °C/W.
This component is classified as End of Life (EOL). No new production is available; only existing stock may be sourced. Verify availability through authorized distributors or inventory holders. Last purchase orders were subject to specific deadlines defined in the manufacturer's discontinuation notice. Replacement parts are not officially listed by the manufacturer.
Select this part when a compact triple isolated Zener solution is required in an SOT-363 package. Ensure the design accommodates the 200 mW power dissipation limit per diode and the specified thermal resistance. Verify that the 11 V nominal voltage and 5% tolerance meet circuit requirements. Note that due to EOL status, alternative sourcing strategies must be implemented.
The CMKZ5241B belongs to the CMKZ5221B series, which includes various Zener voltages ranging from 2.4 V to 47 V. All devices in this series share the same SOT-363 packaging and triple isolated architecture. The series was designed for surface mount applications requiring multiple voltage references in a small footprint.
No official replacement part numbers are provided by Central Semiconductor for the CMKZ5241B. The manufacturer indicates that no direct substitutes are available within their portfolio. Engineers should seek equivalent triple isolated Zener diodes from other manufacturers if continued production is required.
The marking code for the CMKZ5241B is 8RCT.
The maximum reverse current (IR) is 2.0 μA, measured at a reverse voltage (VR) of 8.4 V.
The datasheet does not explicitly state RoHS compliance for the standard CMKZ5241B TR. Ordering suffixes such as PBFREE indicate lead-free plating options, but the base part number's environmental status is not confirmed in the provided text.