BD545B-S

Overview

The BD545B-S is an NPN bipolar junction transistor manufactured by Bourns Inc. It features a maximum collector-emitter voltage of 80 V and a continuous collector current rating of 10 A. The device utilizes a flange mount package with three terminals, where the case is electrically connected to the collector. It supports a maximum operating temperature of 150 °C and complies with RoHS standards.

Feature Summary

• High current handling capability for power applications
• Direct thermal path via collector-connected flange mount
• Single NPN configuration

Applications

• Power switching circuits
• Motor control systems
• Industrial power supplies

Procurement Notes

Verify the exact part number against official Bourns documentation, as the provided knowledge base lists BD245B-S rather than BD545B-S. Confirm that the requested component matches the specified 80V and 10A ratings. Ensure the flange mount package type aligns with your thermal management requirements. Check for RoHS compliance status in the latest datasheet before finalizing procurement.

Selection Notes

Select this component when high current switching is required alongside efficient heat dissipation through the mounting surface. The collector-connected case simplifies thermal design by allowing direct attachment to heatsinks. Verify that the 80V voltage rating meets the circuit's peak reverse voltage requirements. Consider the single-ended configuration for standard NPN switching topologies.

Part Context

This component belongs to the family of power bipolar transistors designed for robust performance in demanding electronic environments. Bourns Inc. produces these devices to meet industrial standards for reliability and electrical stability. The flange mount style distinguishes it from smaller signal transistors, targeting applications requiring significant power handling capabilities.