CMJDH220 TR

Overview

The Central Semiconductor CMJDH220 is a surface mount silicon current limiting diode designed to provide constant current regulation over a wide voltage range. It operates within a peak operating voltage of 50 V and dissipates up to 329 mW at 25°C, or 580 mW when mounted on a PCB. The device regulates a nominal current of 22.5 mA with a maximum of 25 mA and a minimum of 20 mA. It features a dynamic impedance of 0.01 MΩ and a knee impedance of 1.6 kΩ. The component is housed in a low-profile DFN123F case and supports an operating junction temperature range from -65°C to +150°C.

Feature Summary

• Provides constant current regulation across a wide voltage range
• Manufactured in a low-profile epoxy molded DFN123F case
• Functions as a high-impedance active current source replacement

Applications

• Limiting current flowing through LED strings in dimming lighting systems
• Replacing tail resistors in differential amplifiers to improve common mode rejection ratio
• General purpose constant current regulation for critical applications

Procurement Notes

Verify the specific ordering suffix required for your plating preference before purchasing. The manufacturer offers both Tin/Lead and Lead (Pb) Free plated options. To request Lead (Pb) Free devices, add the suffix PBFREE to the part number. For Tin/Lead plating, use the suffix TIN/LEAD. Confirm that the standard lead code configuration matches your circuit design requirements.

Selection Notes

Select the CMJDH220 when a nominal regulator current of 22.5 mA is required. Ensure the application voltage remains below the 50 V peak operating limit. Consider the thermal resistance of 380 °C/W for free-air operation or 215 °C/W for PCB-mounted scenarios. Verify that the negative temperature coefficient aligns with the thermal stability needs of the target circuit.

Part Context

This component belongs to the CMJDH series of surface mount silicon current limiting diodes manufactured by Central Semiconductor Corp. The series includes multiple variants ranging from CMJDH080 to CMJDH220, offering different nominal current selections. All devices share the same DFN123F package and general electrical characteristics while varying in their specific regulator current ratings.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.