NPN BISS transistor

NPN BISS (Breakthrough In Small Signal) transistor in a SOT23 plastic package. PNP complement: PMMT591A.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
PMMT491A PMMT491A,235 934055113235 SOT23 Order product
PMMT491A PMMT491A,215 934055113215 SOT23 Order product

Features and benefits

  • High current (max. 1 A)

  • Low collector-emitter saturation voltage ensures reduced power consumption.

  • AEC-Q101 qualified


  • Battery powered units where high current and low power consumption are important.


Type numberPackage versionPackage nameSize (mm)PolarityPtot (mW)VCEO [max] (V)IC [max] (mA)hFE [min]hFE [max]fT [min] (MHz)
PMMT491ASOT23SOT232.9 x 1.3 x 1NPN250401000300900150

PCB Symbol, Footprint and 3D Model

Model NameDescription


Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackagePackage informationReflow-/Wave solderingPacking
( 9340 551 13235 )

( 9340 551 13215 )

Environmental information

Type numberOrderable part numberChemical contentRoHSRHF-indicator
Quality and reliability disclaimer

Documentation (8)

File nameTitleTypeDate
PMMT491ANPN BISS transistorData sheet2004-01-12
PMMT491A_Nexperia_Product_QualityPMMT491A Nexperia Product QualityQuality document2019-05-20
PMMT491A_Nexperia_Product_ReliabilityPMMT491A Nexperia Product ReliabilityQuality document2023-04-04
PMMT491APMMT491A SPICE modelSPICE model2023-09-05
SOT23_235Reel pack for SMD, 11"; Q3/T4 product orientationPacking information2020-06-01
SOT23_215Reel pack for SMD, 7"; Q3/T4 product orientationPacking information2020-04-29
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
PMMT491APMMT491A SPICE modelSPICE model2023-09-05

PCB Symbol, Footprint and 3D Model

Model NameDescription

Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingPacking quantityBuy online
PMMT491APMMT491A,235934055113235SOT23_235- Order product
PMMT491APMMT491A,215934055113215SOT23_215- 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.