CMJDH180 TR

Current Regulation - Diodes, Transistors Overview

The Central Semiconductor CMJDH180 TR is a surface-mount silicon field-effect current regulator diode housed in a low-profile DFN123F case. It provides a nominal regulator current of 18 mA with a maximum peak operating voltage of 50 V and power dissipation of 329 mW at 25°C. The device operates within a junction temperature range of -65°C to +150°C, featuring a minimum dynamic impedance of 0.02 MΩ and a minimum knee impedance of 1.8 kΩ.

Current Regulation - Diodes, Transistors Feature Summary

• Maintains constant current over a wide voltage range using silicon field-effect technology
• Offers high reliability with special current selections for critical applications
• Provides excellent replacement for current limiting resistors due to superior dynamic performance

Current Regulation - Diodes, Transistors Applications

• Limiting current flowing through LED strings in dimming lighting systems
• Replacing tail resistors in differential amplifiers to improve common mode rejection ratio
• Acting as an active current source to regulate circuit current and present large tail impedance

Current Regulation - Diodes, Transistors Procurement Notes

Verify the specific ordering suffix required for your application. Use PBFREE for lead-free plating or TIN/LEAD for tin-lead plating when placing orders. Confirm package availability and standard lead times directly with Central Semiconductor Corp or authorized distributors before finalizing procurement plans.

Current Regulation - Diodes, Transistors Selection Notes

Select the CMJDH180 for applications requiring an 18 mA nominal current regulation. Ensure the design accommodates the 50 V peak operating voltage limit. Consider the thermal resistance values based on whether the component is mounted on a standard PCB or a specialized 4-layer board with heavy copper traces for optimal heat dissipation.

Current Regulation - Diodes, Transistors Part Context

This component belongs to the CMJDH080 through CMJDH220 series of surface mount silicon current limiting diodes. All devices in this family share the same DFN123F epoxy molded case and operational principles, differing primarily in their specific nominal regulator current ratings and associated electrical characteristics.

Current Regulation - Diodes, Transistors Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Central Semiconductor's application engineering team for potential cross-reference options or custom product development if direct replacements are required.

Current Regulation - Diodes, Transistors FAQ

What is the marking code for the CMJDH180?

The marking code for the CMJDH180 is C183.

How does the CMJDH180 function in a differential amplifier?

It serves as an excellent replacement for the tail resistor, regulating the circuit to a constant current and presenting a large tail impedance to increase the common mode rejection ratio.

What is the typical temperature coefficient for this device?

The temperature coefficient is between -0.25% per °C and -0.45% per °C, measured between +25°C and +50°C.