BD537J

Overview

The BD537J is an NPN silicon power transistor manufactured by onsemi, housed in a TO-220AB flange mount package. It supports a maximum collector current of 8 A and a collector-emitter voltage of 80 V. The device features a minimum DC current gain (hFE) of 15 and can dissipate up to 50 W of power. It operates at junction temperatures up to 150 °C and utilizes through-hole terminals for mounting.

Feature Summary

• NPN single power transistor configuration
• Flange mount plastic/epoxy housing
• Through-hole terminal connection

Applications

Procurement Notes

Verify the specific suffix J against official datasheets to confirm pinout and electrical tolerances. Confirm availability status as distribution listings may indicate obsolete or discontinued status. Ensure thermal management design accounts for the 50 W dissipation rating and flange mounting requirements. Cross-reference manufacturer documentation for any lead frame dimension changes or environmental compliance updates.

Selection Notes

Select this component for high-current switching applications requiring 80 V breakdown and robust thermal performance via flange mounting. Compare hFE minimums and saturation voltages against circuit requirements. Consider the TO-220AB form factor for through-hole assembly constraints. Evaluate thermal resistance characteristics relative to heat sink capabilities.

Part Context

This part belongs to the BD537 series of power transistors from onsemi. The series includes variants such as BD537K with similar electrical ratings but potentially different gain classifications or packaging details. These devices are designed for general-purpose power amplification and switching tasks in industrial and consumer electronics.

Replacement Considerations

Consult official substitution guides for equivalent NPN power transistors with matching 8A/80V ratings and TO-220 packages. Verify compatibility of pinouts and thermal characteristics before replacement.