2N6028G

Overview

The onsemi 2N6028G is a programmable unijunction transistor (UJT) designed for applications requiring precise control of timing and pulse generation. It features a TO-92 through-hole package with a maximum collector-emitter voltage of 40V and a peak emitter current of 150mA. The device allows engineers to program intrinsic stand-off ratio, valley current, and peak current by selecting external resistor values. It offers low gate-to-anode leakage current and a typical high peak output voltage.

Feature Summary

• Programmable characteristics including intrinsic stand-off ratio, valley current, and peak current via external resistors
• Low gate-to-anode leakage current for stable operation
• Low offset voltage typical value for accurate triggering
• Suitable for automatic insertion equipment due to standard plastic packaging

Applications

• Thyristor trigger circuits
• Oscillator circuits
• Pulse generation circuits
• Timing circuits

Procurement Notes

Verify the specific suffix 'G' indicates lead-free compliance and RoHS adherence as per manufacturer documentation. Confirm the package type matches the required PCB footprint, typically TO-92 or TO-226AA. Ensure the ordering quantity aligns with the manufacturer's standard packaging configuration to avoid partial reel issues.

Selection Notes

Select this component when circuit design requires adjustable timing parameters without complex digital logic. Compare the programmed intrinsic stand-off ratio against the application's voltage divider requirements. Verify that the thermal dissipation capabilities within the TO-92 package are sufficient for the expected duty cycle and ambient temperature conditions.

Part Context

This part belongs to the 2N6027/2N6028 family of programmable UJTs manufactured by onsemi. These devices are engineered to replace fixed-parameter UJTs, offering flexibility in circuit design. The family is widely used in industrial controls and consumer electronics where reliable pulse triggering is essential.

Replacement Considerations

Direct substitutes include the 2N6027 and 2N6028 from Central Semiconductor. Cross-reference electrical specifications such as V_EBO and I_P to ensure compatibility. Verify pinout consistency between TO-92 variants from different manufacturers before implementation.