BAS21W series

High-voltage switching diodes

High-voltage switching diodes, encapsulated in a very small Surface-Mounted Device (SMD) plastic package.


  • High switching speed: trr ≤ 50 ns
  • Low capacitance: Cd ≤ 2 pF
  • Low leakage current
  • Very small SMD plastic package
  • High reverse voltage: VR ≤ 250 V
  • AEC-Q101 qualified

Target applications

  • High-speed switching
  • Voltage clamping
  • General-purpose switching
  • Reverse polarity protection


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)
BAS21AWSOT323SC-702 x 1.25 x 0.9520091250@IF=200mA100@VR=200V625dual c.a.502252
BAS21SWSOT323SC-702 x 1.25 x 0.9520091000@IF=100mA100@VR=200V625dual series502252
BAS21WSOT323SC-702 x 1.25 x 0.9520091000@IF=100mA100@VR=200V625single502502


Type numberPackageOutline versionReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
SOT323Reel 7" Q1/T1ActiveX6%BAS21AW,115
( 9340 632 69115 )
SOT323Reel 7" Q1/T1ActiveX5%BAS21SW,115
( 9340 632 71115 )
SOT323Reel 7" Q1/T1ActiveX4%BAS21W,115
( 9340 632 68115 )

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
BAS21AWBAS21AW,115BAS21AWAlways Pb-free358.01.666.02E811
BAS21SWBAS21SW,115BAS21SWAlways Pb-free358.01.666.02E811
BAS21WBAS21W,115BAS21WAlways Pb-free358.01.666.02E811
Quality and reliability disclaimer

Documentation (6)

File nameTitleTypeDate
BAS21W_SERHigh-voltage switching diodesData sheet2018-08-28
LSYMDIO-Design support1999-04-30
nexperia_selection_guide_2019_201901Selection guide 2019. Discretes, Logic and MOSFETsSelection guide2018-12-12
SOT323plastic, surface-mounted package; 3 leads; 1.3 mm pitch; 2 mm x 1.25 mm x 0.95 mm bodyOutline drawing2017-01-31
SOT323_135Tape reel SMD; standard product orientation 12NC ending 135Packing2012-11-16
SOT323_115Tape reel SMD; standard product orientation 12NC ending 115Packing2012-11-16


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