2N6028 APM PBFREE

Overview

The Central Semiconductor 2N6028 APM PBFREE is a silicon programmable unijunction transistor housed in a TO-92 (TO-226AA) through-hole package. It supports an Anode-Cathode voltage of 40V and a DC forward anode current of 150mA, with a maximum power dissipation of 300mW. The device operates within a junction temperature range of -50°C to +100°C. Key electrical parameters include a peak current of 150nA at RG=1.0MΩ, a valley current of 25µA at RG=1.0MΩ, and a compensation voltage of 600mV. Gate-anode leakage is limited to 10nA.

Feature Summary

• Features adjustable intrinsic standoff ratio and valley current characteristics via external resistor selection.
• Provides low gate-to-anode leakage current for stable circuit operation.
• Offers low on-state voltage drop during conduction.

Applications

• Thyristor and SCR triggering circuits
• Relaxation oscillators
• Pulse generation and timing circuits

Procurement Notes

Verify the specific ordering suffix when purchasing. The 'APM' designation indicates Ammo Pack packaging, while 'PBFREE' confirms lead-free plating compliance. Confirm that the required lead finish matches the application's environmental standards. Ensure the procurement order explicitly states the desired packaging format to avoid receiving bulk or reel variants if the specific ammo pack configuration is critical for assembly automation.

Selection Notes

Select this component when a programmable unijunction transistor with a 40V rating and through-hole mounting is required. Compare the 2N6028 against the 2N6027 based on specific valley current and peak current tolerances needed for the design. Verify that the TO-92 package dimensions fit the PCB layout constraints. Consider the 300mW power dissipation limit when calculating thermal requirements for the operating environment.

Part Context

This device belongs to the 2N6027/2N6028 series of silicon programmable unijunction transistors manufactured by Central Semiconductor Corp. These components are designed for applications requiring adjustable characteristics such as intrinsic standoff ratio and peak/valley currents. The series is available in various packages including TO-92 and surface-mount options like SOT-23.

Replacement Considerations

The CMPP6028 TR PBFREE serves as a surface-mount alternative in a SOT-23 package. For direct pin-compatible replacements, verify datasheet specifications for equivalent voltage ratings and current handling capabilities before substitution.

FAQ

How are the programmable characteristics of the 2N6028 adjusted?

The intrinsic standoff ratio, valley current, and peak current are adjusted by selecting appropriate external resistor values connected to the gate terminal.

What is the maximum power dissipation for this device?

The maximum power dissipation is 300 mW at an ambient temperature of 25°C.

What does the 'PBFREE' suffix indicate?

The 'PBFREE' suffix indicates that the device features lead-free plating, complying with RoHS3 environmental regulations.