BD647-S

Description：TRANS NPN DARL 80V 8A TO-220
Series：-

SKU:8cb9ef4d74eb Category: Single Bipolar Transistors Brand: Bourns Inc.

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Product introduction

Product Detailed Parameters

Description：TRANS NPN DARL 80V 8A TO-220
Series：-
Mfr：Bourns Inc.
Package：Tube
Transistor Type：NPN - Darlington
Current - Collector (Ic) (Max)：8:00 AM
Voltage - Collector Emitter Breakdown (Max)：80 V
Vce Saturation (Max) @ Ib, Ic：2.5V @ 50mA, 5A
Current - Collector Cutoff (Max)：500µA
DC Current Gain (hFE) (Min) @ Ic, Vce：750 @ 3A, 3V
Power - Max：2 W
Frequency - Transition：-
Operating Temperature：-65°C ~ 150°C (TJ)
Mounting Type：Through Hole
Package / Case：TO-220-3
Supplier Device Package：TO-220
Grade：-
Qualification：-

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BD647-S

Overview

The BD647-S is an NPN Darlington transistor manufactured by Bourns Inc., designed for through-hole mounting in the TO-220 package. It features a maximum collector current of 8A and a collector-emitter breakdown voltage of 80V. The device has a power rating of 2W at case temperatures up to 25°C, with a continuous collector current capability of 8A. A minimum DC current gain (hFE) of 750 is specified at 3A collector current and 3V collector-emitter voltage. The component is classified as obsolete and is no longer actively manufactured.

Feature Summary

High current handling capability suitable for power switching applications
Darlington configuration providing high current gain
Through-hole construction for robust mechanical mounting

Applications

Power switching circuits
Motor control systems
Industrial automation equipment

Procurement Notes

This component is officially listed as obsolete and is no longer manufactured by Bourns Inc. Procurement should focus on identifying verified direct substitutes or alternative components from other manufacturers that meet the required electrical specifications. Verify compatibility with existing circuit designs before sourcing replacements.

Selection Notes

When selecting a replacement for this obsolete part, prioritize components with matching NPN Darlington topology and similar current and voltage ratings. Ensure the substitute supports through-hole mounting in a compatible package type. Verify that the new component meets the required current gain specifications for the intended application to maintain system performance.

Part Context

The BD647-S belongs to a series of high-power bipolar junction transistors designed for demanding applications. It is part of Bourns' historical portfolio of discrete semiconductor devices. The product line typically includes variants with different voltage and current ratings to support various industrial and consumer electronics needs.