CMPP6028 TR PBFREE

Overview

The CMPP6028 TR PBFREE is a surface-mount silicon programmable unijunction transistor (PUJT) manufactured by Central Semiconductor Corp. It utilizes an SOT-23 package and features adjustable valley current, peak current, and intrinsic standoff ratio via external components. Key electrical ratings include a maximum Gate-Cathode Forward Voltage of 40 V, Anode-Cathode Voltage of 40 V, and DC Forward Anode Current of 150 mA. The device supports a power dissipation of 167 mW at 25°C with a thermal resistance of 450 °C/W. Operating junction temperature ranges from -50°C to +100°C.

Feature Summary

• Surface-mount silicon construction in an SOT-23 package for compact integration
• Adjustable intrinsic standoff ratio and current characteristics through external programming
• High voltage tolerance with 40 V maximum ratings for gate-cathode and anode-cathode applications

Applications

• Timing circuits requiring precise pulse generation
• Oscillator designs utilizing programmable frequency control
• Triggering circuits for thyristors or SCRs

Procurement Notes

Verify the specific ordering suffix when purchasing. The 'PBFREE' designation indicates lead-free plating compliance. Ensure the procurement request explicitly matches the required plating option, as tin/lead variants require a distinct suffix. Confirm the manufacturer source is Central Semiconductor Corp to ensure component authenticity and datasheet alignment.

Selection Notes

Select this component for applications necessitating a programmable unijunction transistor in a small surface-mount footprint. The SOT-23 package limits power dissipation to 167 mW, requiring careful thermal management on FR-4 PCBs. Designers must account for the specific peak and valley current ranges defined by the external resistor network to achieve desired timing or oscillation parameters.

Part Context

This part belongs to the CMPP60xx series of surface-mount programmable unijunction transistors. It shares the same physical package and general functionality as the CMPP6027, distinguished primarily by its marking code (P28 vs P27). Both devices offer similar electrical characteristics but are differentiated for inventory and identification purposes within Central Semiconductor's discrete semiconductor lineup.

Replacement Considerations

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