CMKZ5243B TR

Overview

The CMKZ5243B TR is a surface mount triple isolated silicon Zener diode from the Central Semiconductor CMKZ5221B series, packaged in an ULTRAmini SOT-363 case. It contains three independent Zener diodes with a nominal voltage of 13 V and a tolerance of ±5%. Each diode operates at a test current of 9.5 mA, exhibiting a maximum dynamic impedance of 13 Ω and a reverse current of 0.5 μA at 9.9 V. The device supports a power dissipation of 200 mW and functions within a junction temperature range of -65 to +150 °C.

Feature Summary

• Triple isolated configuration providing three independent Zener diodes in a single compact package
• Designed for industrial, commercial, entertainment, and computer applications
• Surface mount construction utilizing the ULTRAmini SOT-363 case

Applications

• Industrial equipment voltage regulation
• Commercial circuit protection
• Entertainment system power management
• Computer application voltage reference

Procurement Notes

This component has been officially transitioned to End of Life status by Central Semiconductor Corp. Current availability is restricted to existing stock only, as new production has ceased. Buyers should verify supplier inventory levels carefully before committing to orders, as no fresh manufacturing runs are scheduled. Procurement strategies must account for limited supply longevity and potential obsolescence risks associated with discontinued semiconductor components.

Selection Notes

Engineers selecting this part must consider its triple-diode isolation capability for space-constrained designs requiring multiple voltage references. The 5% tolerance suits general regulation tasks but may require tighter specifications for precision circuits. Designers should evaluate the thermal resistance and power dissipation limits relative to their specific PCB layout and ambient operating conditions to ensure reliable performance throughout the specified temperature range.

Part Context

The CMKZ5243B TR belongs to the broader CMKZ5221B through CMKZ5261B series of surface mount triple isolated silicon Zener diodes. This series offers various nominal voltages ranging from 2.4 V to 47 V, all sharing the same SOT-363 packaging and electrical characteristics structure. The specific model provides a 13 V nominal rating within this extensive lineup of voltage regulator components.

Replacement Considerations

Central Semiconductor lists no direct replacement part numbers for the CMKZ5243B TR. The manufacturer indicates that replacements are not available and advises contacting [email protected] for assistance in locating alternate sources or suitable substitutes from other manufacturers.