CMJ4500 TR PBFREE

Overview

The Central Semiconductor CMJ4500 TR PBFREE is a surface mount silicon current regulator diode designed to maintain a constant current over a wide voltage range. It operates within the CMJ series, utilizing an epoxy molded SOD-123FL case. The device provides a nominal regulator current of 4.5 mA with a maximum rating of 5.1 mA at a test voltage of 25 V. It supports a peak operating voltage of 100 V and dissipates up to 500 mW of power. The unit functions reliably across a junction temperature range of -65°C to +150°C.

Feature Summary

• Maintains constant current regulation across a broad voltage spectrum
• Utilizes low-profile epoxy molded SOD-123FL surface mount package
• Engineered for high reliability in critical applications

Applications

• Biasing circuits requiring stable current sources
• LED driver circuits for consistent illumination
• Transistor bias networks

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm plating options. The standard designation indicates lead-free compliance. Confirm availability through authorized distributors as production schedules may vary. Ensure the requested quantity aligns with reel packaging requirements specified by the supplier.

Selection Notes

Select this component when a precise 4.5 mA current source is required in a compact surface mount footprint. Evaluate the 100 V peak operating voltage limit to ensure compatibility with circuit supply rails. Consider the thermal resistance and power dissipation limits relative to the ambient operating environment and board layout constraints.

Part Context

This part belongs to the CMJ0130 through CMJH220 series of surface mount silicon current limiting diodes. The series offers various current selections tailored for different application needs. All devices share the same SOD-123FL mechanical outline and general electrical characteristics structure, differing primarily in their specific regulator current ratings.

Replacement Considerations

Direct substitutes include other CMJ series parts with similar current ratings, such as the CMJ3500 or CMJ5750, provided the current tolerance and impedance specifications meet the design requirements. Verify pinout compatibility and thermal performance before substitution.