CMKZ5248B TR

Overview

The CMKZ5248B TR is a surface mount triple isolated silicon Zener diode from Central Semiconductor Corp, housed in an ULTRAmini SOT-363 package. It contains three electrically isolated Zener diodes with a nominal voltage of 18V and a 5% tolerance (17.10V min, 18.90V max). The test current is 7.0mA, with maximum Zener impedance of 21Ω at IZT and 600Ω at IZK. Maximum reverse current is 0.1μA at 14V, and the temperature coefficient is +0.085%/°C. Power dissipation is 200mW, operating junction temperature ranges from -65°C to +150°C, and thermal resistance is 625°C/W.

Feature Summary

• Triple isolated silicon Zener diodes integrated into a single compact surface mount package
• Designed for industrial, commercial, entertainment, and computer applications
• Features 5% voltage tolerance for precise regulation requirements

Applications

• Industrial control systems requiring multiple reference voltages
• Commercial equipment needing compact voltage regulation
• Computer circuitry utilizing space-efficient isolation components

Procurement Notes

This component is classified as End of Life (EOL) by Central Semiconductor Corp. No direct replacement part numbers are available; only existing stock may be sourced. Last purchase orders were accepted six months from the notice date, with final shipments occurring twelve months after notification. Verification of current stock availability through authorized distributors is essential before integration planning.

Selection Notes

Select this device when triple isolated Zener references are required in a minimal footprint. Verify that the 18V nominal voltage and 200mW power dissipation meet circuit demands. Ensure compatibility with SOT-363 land patterns. Note that EOL status limits long-term supply continuity, necessitating alternative sourcing strategies or design modifications for future production runs.

Part Context

Part of the CMKZ5221B through CMKZ5261B series, offering various Zener voltages from 2.4V to 47V in identical packaging. All variants share the same SOT-363 form factor and electrical characteristics structure, differing primarily in breakdown voltage and associated impedance values. This series targets applications requiring multiple independent voltage references in confined spaces.

Replacement Considerations

No official replacement part numbers are listed by Central Semiconductor. The manufacturer indicates N/A for replacements, suggesting only stock availability. Engineers must identify third-party equivalents or redesign circuits if long-term supply is required.