BC817DSF

Overview

The BC817DSF is a dual NPN general-purpose transistor array manufactured by Nexperia USA Inc. It features two independent NPN elements housed in a surface-mount SC-74 (SOT457) package. The device supports a maximum collector current of 500 mA and a collector-emitter voltage of 45 V. Key electrical specifications include a transition frequency of 100 MHz, a power dissipation of 370 mW, and a DC current gain (hFE) minimum of 250 at 100 mA and 1 V. The saturation voltage is specified at a maximum of 700 mV under defined test conditions.

Feature Summary

• Dual configuration with two independent NPN transistors sharing no common terminals
• High current capability suitable for general-purpose switching applications
• Surface-mount design optimized for automated assembly processes

Applications

• General-purpose signal switching circuits
• Amplification stages in low-power electronics
• Logic interface and level shifting applications

Procurement Notes

Verify the specific ordering code suffix to ensure correct packaging format, such as tape and reel quantities or cut tape options. Confirm RoHS compliance status and lead-free characteristics against the latest manufacturer datasheet revision. Check for any recent production change notices regarding assembly sites or material composition updates before finalizing component selection.

Selection Notes

Select this component when space-constrained designs require two isolated NPN switching functions within a single small outline package. Ensure the application voltage remains below the 45 V breakdown limit and current stays within the 500 mA rating. Consider the thermal performance of the SC-74 package for power dissipation requirements in dense PCB layouts.

Part Context

This part belongs to the BC817 series of NPN general-purpose transistors produced by Nexperia. While the standard BC817 offers a single transistor in an SOT23 package, the BC817DSF variant integrates two devices into a six-pin TSOP/SOT457 footprint. This configuration provides design flexibility for differential pairs or dual-switching needs without increasing board area significantly compared to discrete solutions.

Replacement Considerations

Direct substitutes include other dual NPN arrays in compatible packages like the BC817DS,115. Verify pinout compatibility and electrical parameters match before swapping. Alternative single-transistor solutions may require layout adjustments if dual functionality is not strictly necessary.