Register once, drag and drop ECAD models into your CAD tool and speed up your design.

Click here for more information


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


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

Reel 11" Q3/T4, LargePack
( 9340 551 13215 )
Active9A%Reel 7" Q3/T4

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFMSLMSL leadfree
Quality and reliability disclaimer

Documentation (5)

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 document2021-03-19
PMMT491APMMT491A SPICE modelSPICE model2020-11-11
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 model2020-11-11

Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
PMMT491APMMT491A,235934055113235Reel 11" Q3/T4, LargePackOrder product
PMMT491APMMT491A,215934055113215Reel 7" Q3/T4Order product


As a Nexperia customer you can order samples via our sales organization or directly via our Online Sample Store:

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.