BAS19; BAS20; BAS21

General purpose diodes

The BAS19, BAS20 and BAS21 are general purpose diodes fabricated in planar technology, and encapsulated in a small SOT23 plastic SMD package.


  • Small plastic SMD package
  • Switching speed: max. 50 ns
  • General application
  • Continuous reverse voltage: max. 100 V; 150 V; 200 V
  • Repetitive peak reverse voltage: max. 120 V; 200 V; 250 V
  • Repetitive peak forward current: max. 625 mA

Target applications

  • General purpose switching in e.g. surface mounted circuits


Type numberPackage versionPackage nameSize (mm)VR [max] (V)IFSM [max] (A)VF [max] (mV)IR [max] (nA)IFRM (mA)Configurationtrr [max] (ns)IF [max] (mA)Cd [max] (pF)
BAS19SOT23SOT232.9 x 1.3 x 110091000@IF=100mA100@VR=100V625single502005
BAS20SOT23SOT232.9 x 1.3 x 115091000@IF=100mA100@VR=150V625single502005
BAS21SOT23SOT232.9 x 1.3 x 120091000@IF=100mA100@VR=200V625single502005


Type numberPackageOutline versionReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))

SOT23Reel 7" Q3/T4ActiveJP%BAS19,215
( 9335 020 20215 )
Reel 11" Q3/T4, LargePackActiveJP%BAS19,235
( 9335 020 20235 )

SOT23Reel 11" Q3/T4, LargePackActiveJR%BAS20,235
( 9335 020 30235 )
Reel 7" Q3/T4ActiveJR%BAS20,215
( 9335 020 30215 )

SOT23Multi-reel 11" T4/Q3 SMD Pitch 4mmSamples available / DevelopmentJS%BAS21Z
( 9335 020 40300 )
Reel 7" Q3/T4ActiveJS%BAS21,215
( 9335 020 40215 )
Reel 11" Q3/T4, LargePackActiveJS%BAS21,235
( 9335 020 40235 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
BAS19BAS19,215BAS19week 34, 2003409.01.95.26E811
BAS19BAS19,235BAS19week 34, 2003409.01.95.26E811
BAS20BAS20,235BAS20week 34, 2003409.01.95.26E811
BAS20BAS20,215BAS20week 34, 2003409.01.95.26E811
BAS21BAS21,215BAS21week 34, 2003409.01.95.26E811
BAS21BAS21,235BAS21week 34, 2003409.01.95.26E811
Quality and reliability disclaimer

Documentation (6)

File nameTitleTypeDate
BAS19_20_21General purpose diodesData sheet2003-03-19
nexperia_selection_guide_2019_201901Selection guide 2019. Discretes, Logic and MOSFETsSelection guide2018-12-12
SOT23_185Tape reel SMD; standard product orientation 12NC ending 185Packing2012-11-16
SOT23_235Tape reel SMD; standard product orientation 12NC ending 235Packing2013-02-05
SOT23_215Tape reel SMD; standard product orientation 12NC ending 215Packing2012-11-16
SOT23plastic, surface-mounted package; 3 terminals; 1.9 mm pitch; 2.9 mm x 1.3 mm x 1 mm bodyOutline drawing2019-01-09


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.

Ordering, pricing & availability


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.