SMA4020

Overview

The SMA4020 is a PNP Darlington transistor manufactured by Sanken Electric USA Inc. It features an integrated circuit configuration with two resistors: R1 (base resistor) at 2kΩ and R2 (emitter-base resistor) at 150Ω. The device supports a maximum collector current of -4A and a collector-emitter voltage of -60V. Key electrical characteristics include a DC current gain (hFE) of 2000 at VCE=-4V and IC=-3A, with a collector-emitter saturation voltage of -1.5V under the same conditions. It operates within a junction temperature range up to 150°C and is housed in a SIP-7 package.

Feature Summary

• Integrated base and emitter-base resistors for simplified drive circuitry
• High DC current gain suitable for low input current applications
• Robust thermal performance with a maximum junction temperature of 150°C

Applications

• General purpose switching circuits
• Driver stages for relays and solenoids
• Logic interface circuits requiring high gain

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific packaging options such as tape and reel or bulk quantities. Ensure ordering suffixes match exact mechanical and electrical requirements before finalizing procurement orders.

Selection Notes

Select this component when high current gain and integrated biasing are required for PNP switching applications. Verify that the -60V collector-emitter voltage rating exceeds the maximum operating voltage. Ensure the -4A continuous collector current capability aligns with the load requirements and thermal management strategy.

Part Context

This part belongs to Sanken's SMA series of general-purpose PNP Darlington transistors. The series typically includes variants with different internal resistance values to suit various logic families and drive currents. The SMA4020 specifically integrates standard biasing resistors for ease of use in digital-to-analog interface scenarios.

Replacement Considerations

Cross-reference with other PNP Darlington arrays featuring similar -60V ratings and -4A current capacity. Verify pinout compatibility and internal resistor values to ensure functional equivalence without redesigning the surrounding circuitry.

FAQ

What are the internal resistor values in the SMA4020?

The SMA4020 contains an internal base resistor (R1) of 2kΩ and an emitter-base resistor (R2) of 150Ω.

What is the maximum junction temperature for the SMA4020?

The maximum junction temperature (Tj) for the SMA4020 is 150°C.

What is the typical DC current gain (hFE) at full load?

The typical DC current gain (hFE) is 2000 when measured at VCE = -4V and IC = -3A.