NPN Darlington transistor

NPN Darlington transistor in an SOT223 Surface-Mounted Device (SMD) plastic package.

PNP complement: BSP61

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
BSP51 BSP51,115 933986340115 SOT223 Order product

Features and benefits

  • High current of 1 A

  • Low voltage of 60 V

  • Integrated diode and resistor


  • Industrial high gain amplification


Type numberPackage versionPackage nameSize (mm)hFE [min]toff (ns)fT [min] (MHz)PolarityIC [max] (mA)VCES [max] (V)Ptot [max] (mW)ComplementIC [max] (mA)Ptot [max] (mW)VCES [max] (V)fT [min] (MHz)hFE [max]hFE [min]Automotive qualified
BSP51SOT223SC-736.5 x 3.5 x 1.6520001300200NPN1000601250BSP611000125060200>20002000N

PCB Symbol, Footprint and 3D Model

Model NameDescription


Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackagePackage informationReflow-/Wave solderingPacking
( 9339 863 40115 )

Environmental information

Type numberOrderable part numberChemical contentRoHSRHF-indicator
Quality and reliability disclaimer

Documentation (9)

File nameTitleTypeDate
BSP51NPN Darlington transistorData sheet2018-07-13
LSYMTRALetter Symbols - Transistors; GeneralOther type1999-05-06
DERATSMDPower Derating Curves for SMDs; GeneralOther type1999-05-06
BSP51_Nexperia_Product_QualityBSP51 Nexperia Product QualityQuality document2019-05-20
BSP51_Nexperia_Product_ReliabilityBSP51 Nexperia Product ReliabilityQuality document2023-04-04
BSP51BSP51 SPICE modelSPICE model2023-11-17
SOT223_115Tape reel SMD; standard product orientation 12NC ending 115Packing information2020-04-27
REFLOW_BG-BD-1Reflow soldering profileReflow soldering2021-04-06
WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08


If you are in need of design/technical support, let us know and fill in the answer form, we'll get back to you shortly.


File nameTitleTypeDate
BSP51BSP51 SPICE modelSPICE model2023-11-17

PCB Symbol, Footprint and 3D Model

Model NameDescription

Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingPacking quantityBuy online
BSP51BSP51,115933986340115SOT223_115- Order product


As a Nexperia customer you can order samples via our sales organization or directly via our Online Sample Store: https://extranet.nexperia.com.

Sample orders normally take 2-4 days for delivery.

If you do not have a direct account with Nexperia our network of global and regional distributors is available and equipped to support you with Nexperia samples.

How does it work?

The interactive datasheets are based on the Nexperia MOSFET precision electrothermal models. With our interactive datasheets you can simply specify your own conditions interactively. Start by changing the values of the conditions. You can do this by using the sliders in the condition fields. By dragging the sliders you will see how the MOSFET will perform at the new conditions set.