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BAS521 ECAD models PCB Symbol, Footprint & ECAD Model

Single high-voltage switching diode

Single high-voltage switching diode, fabricated in planar technology, and encapsulated in a SOD523 (SC-79) ultra small Surface-Mounted Device (SMD) plastic package.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
BAS521 BAS521,115 934057766115 SOD523 Order product
BAS521 BAS521,315 934057766315 SOD523 Order product
BAS521 BAS521,135 934057766135 SOD523 Order product


  • High switching speed: trr ≤ 50 ns
  • High reverse voltage: VR ≤ 300 V
  • Repetitive peak forward current: IFRM ≤ 1 A
  • Ultra small SMD plastic package
  • AEC-Q101 qualified

Target applications

  • High-speed switching
  • High-voltage switching


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)
BAS521SOD523SC-791.2 x 0.8 x 0.63004.51100@IF=100mA150@VR=250V1000single502505


Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackageOutline versionReflow-/Wave solderingPacking
( 9340 577 66115 )
SOD523Reel 7" Q1/T1
( 9340 577 66315 )
ActiveL4Reel 7" Q1/T1 Pitch 2mm
( 9340 577 66135 )
ActiveL4Reel 11¼" Q1/T1 in LargePack

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFEFRIFRMTBF (hour)MSLMSL leadfree
Quality and reliability disclaimer

Documentation (8)

File nameTitleTypeDate
BAS521Single high-voltage switching diodeData sheet2018-06-29
BAS521_Nexperia_Product_QualityBAS521 Nexperia Product QualityQuality document2019-05-20
BAS521_Nexperia_Product_ReliabilityBAS521 Nexperia Product ReliabilityQuality document2019-04-29
BAS521BAS521 SPICE modelSPICE model2014-01-21
SOD523_135Reel pack, SMD, 11"; Q1/T1 standard product orientation; Orderable part number ending ,135 or F; Ordering code (12NC) ending 135Packing2019-04-08
SOD523_315Reel pack, SMD, 7"; Q1/T1 standard product orientation; Orderable part number ending ,315 or YL; Ordering code (12NC) ending 315Packing2019-04-08
SOD523_115Reel pack, SMD, 7"; Q1/T1 standard product orientation; Orderable part number ending ,115 or X; Ordering code (12NC) ending 115Packing2019-04-08
SOD523plastic, surface-mounted package; 2 leads; 1.2 mm x 0.8 mm x 0.6 mm bodyOutline drawing2019-01-25


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
BAS521BAS521 SPICE modelSPICE model2014-01-21

Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
BAS521BAS521,115934057766115Reel 7" Q1/T1Order product
BAS521BAS521,315934057766315Reel 7" Q1/T1 Pitch 2mmOrder product
BAS521BAS521,135934057766135Reel 11¼" Q1/T1 in LargePackOrder 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.