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The CMKZ5221B TR is a surface mount triple isolated silicon Zener diode from Central Semiconductor Corp, housed in an ULTRAmini SOT-363 case. It contains three independent Zener diodes with a nominal voltage of 2.4 V and a tolerance of 5%. The maximum power dissipation per diode is 200 mW at 25°C ambient temperature. Electrical characteristics include a test current of 20 mA, a maximum Zener impedance of 30 Ohms, and a maximum reverse current of 0.25 µA. The device operates within a junction temperature range of -65 to +150 °C.
This component has been officially transitioned to End of Life (EOL) status by the manufacturer. Current availability is restricted to existing stock only; no new production orders are accepted. Buyers must verify inventory levels with authorized distributors or suppliers before committing to purchases, as supply is finite and subject to depletion without replenishment.
Designers should evaluate alternative components due to the discontinued status of this part number. Verify that replacement devices match the required SOT-363 footprint and electrical specifications, specifically the 2.4 V Zener voltage and 200 mW power dissipation limits. Ensure compatibility with the intended operating temperature range and isolation requirements for the specific application circuit.
The CMKZ5221B belongs to the CMKZ5221B through CMKZ5261B series of triple isolated silicon Zener diodes manufactured by Central Semiconductor Corp. These devices utilize the ULTRAmini SOT-363 surface mount case design. The series offers various voltage options ranging from 2.4 V to 47 V, all maintaining consistent packaging and isolation characteristics for multi-channel voltage reference applications.
No direct replacement part numbers are listed in the official discontinuation notice. The document indicates 'N/A, Stock Only' for all variants in this series. Engineers must source equivalent triple-isolated Zener diodes from other manufacturers if new production is required.