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Product Detailed Parameters
- Description：TRANS NPN 45V 0.5A DFN1110D-3
- Series：BC817QB
- Mfr：Nexperia USA Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Transistor Type：NPN
- Current - Collector (Ic) (Max)：500 mA
- Voltage - Collector Emitter Breakdown (Max)：45 V
- Vce Saturation (Max) @ Ib, Ic：700mV @ 50mA, 500mA
- Current - Collector Cutoff (Max)：100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce：250 @ 100mA, 1V
- Power - Max：350 mW
- Frequency - Transition：100MHz
- Operating Temperature：150°C (TJ)
- Mounting Type：Surface Mount, Wettable Flank
- Package / Case：3-XDFN Exposed Pad
- Supplier Device Package：DFN1110D-3
- Grade：Automotive
- Qualification：AEC-Q101
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Overview
The Nexperia BC817-40QB is an NPN general-purpose transistor housed in a DFN1110D-3 (SOT8015) leadless surface-mounted package. It features a collector-emitter voltage of 45 V and a continuous collector current of 500 mA, with a peak pulse current capability of 1 A. The device offers a DC current gain range of 250 to 600 at 100 mA. Total power dissipation reaches 350 mW on a standard 35 μm copper FR4 PCB. The component operates within a junction temperature range up to 150 °C and is qualified under the AEC-Q101 automotive standard.
Feature Summary
- Ultra-thin DFN1110D-3 package with side-wettable flanks for enhanced thermal performance and Automatic Optical Inspection compatibility
- High current handling capability with a 500 mA continuous rating and 1 A peak pulse support
- Automotive-grade qualification ensuring reliability for demanding electronic environments
Applications
- General-purpose switching circuits
- Signal amplification stages
- Space-restricted electronic designs
Procurement Notes
Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging details and reel specifications. Ensure that the procurement channel provides valid traceability records. Confirm compliance with RoHS directives and check for any recent product change notices regarding assembly sites or material composition updates before finalizing orders.
Selection Notes
Select this component when a compact footprint and superior thermal dissipation are required compared to traditional SOT-23 packages. The high DC current gain makes it suitable for efficient drive applications. Verify that the operating ambient temperature remains within the specified limits to maintain the rated power dissipation capabilities on the target printed circuit board layout.
Part Context
This device belongs to the BC817QB series, which includes variants with different current gain ranges such as BC817-16QB and BC817-25QB. All members share the same DFN1110D-3 package and electrical ratings, differing primarily in their hFE classification. The series serves as a modern replacement for legacy leaded SMD packages, offering improved solder joint visibility and reduced board space requirements.
Replacement Considerations
Direct substitutes include BC817-16QB and BC817-25QB from the same series, provided the specific current gain requirements align with the application design constraints.
