BST51TA

Single Bipolar Transistors Overview

The BST51TA is an NPN Darlington transistor manufactured by Diodes Incorporated, housed in a SOT-89 surface-mount package. It features a maximum collector current of 0.5 A and a maximum collector-emitter voltage of 80 V. The device integrates a diode and resistor within the package structure. Key electrical specifications include a power dissipation rating of 1 W and a transition frequency (fT) of 60 MHz. It operates within a temperature range of -55°C to +150°C.

Single Bipolar Transistors Feature Summary

• NPN Darlington configuration for high current gain
• Integrated internal diode and resistor components
• SOT-89 plastic surface-mount packaging

Single Bipolar Transistors Applications

• Industrial switching applications
• Print hammer driving circuits
• Solenoid control systems
• Relay and lamp driving modules

Single Bipolar Transistors Procurement Notes

Verify the manufacturer designation on the component marking, as BST51 variants are produced by multiple vendors including NXP and Zetex. Confirm the specific suffix 'TA' corresponds to the Diodes Incorporated reel or tape-and-reel packaging format. Ensure the integrated circuit topology matches the required schematic design before procurement.

Single Bipolar Transistors Selection Notes

Select this component when a single-package solution combining a Darlington transistor with protective or biasing passive elements is required. The SOT-89 form factor suits space-constrained designs needing moderate current handling. Verify that the 80V voltage rating meets the load requirements and that the integrated passive values align with the target application logic.

Single Bipolar Transistors Part Context

This part belongs to the BST51 family of NPN Darlington transistors. It serves as a compact alternative to discrete transistor assemblies. The integration of internal components reduces board space and simplifies assembly processes for industrial control and driver circuits requiring reliable switching performance.

Single Bipolar Transistors Replacement Considerations

Official PNP complements listed for the BST51 series include BST60, BST61, and BST62. Cross-vendor equivalents exist from manufacturers such as NXP Semiconductors and Zetex Semiconductors. Verify pinout compatibility and integrated component values when substituting.