High voltage, high speed planar passivated NPN power switching transistor in a SOT78 (TO220AB) plastic package intended for use in high frequency electronic lighting ballast applications, converters, inverters, switching regulators, motor control systems, etc.

Features and Benefits
  • Fast switching
  • Low thermal resistance
  • Very high voltage capability
  • Very low switching and conduction losses
  • DC-to-DC converters
  • High frequency electronic lighting ballasts
  • Inverters
  • Motor control system
  • Switching regulators
Quality, reliability & chemical content
Type Number Symbol Parameter Conditions Min Typ/Nom Max Unit
BUJ403A VCESM collector-emitter peak voltage VBE = 0 V     1200 V
IC collector current       6 A
hFE DC current gain IC = 3 A; VCE = 5 V   15.5    
tf fall time IC = 2.5 A; IBon = 0.5 A; VBB = -5 V; LB = 1 µH; inductive load   170 300 ns
Type number Package Packing Product status Marking Orderable part number Ordering code (12NC)
Horizontal, Rail Pack Volume production Standard Marking BUJ403A,127 9340 546 60127
BUJ403A/DG BUJ403A/DG,127 9340 655 86127
Type number Ordering code (12NC) Orderable part number Region Distributor Order sample
BUJ403A 9340 546 60127 BUJ403A,127 NA NA  
BUJ403A/DG 9340 655 86127 BUJ403A/DG,127


Chemical content Orderable part number Type number RoHS / RHF Leadfree conversion date MSL MSL LF
BUJ403A BUJ403A,127   BUJ403A Leaded H   NA NA
BUJ403A/DG Leaded H   NA NA

Chemical Content - BUJ403A

As a proactive and sustainable company, WeEn Semiconductors has decided to publish chemical content information of its product portfolio through direct Internet access. With this information, we can provide data to our customers to facilitate any assessment regarding compliance to the RoHS directive and lead-free status. WeEn Semiconductors has set a standard in the semiconductor business with this detailed level of data, directly retrieved from its general product database. WeEn Semiconductors products are compliant to the EU Directives RoHS, ELV and the China RoHS.


All information in this document is furnished for exploratory or indicative purposes only. All information in this document is believed to be accurate and reliable. However, WeEn Semiconductors does not give any representations or warranties as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. WeEn Semiconductors may make changes to information published in this document at any time and without notice. Minor deviations may occur in the products from different manufacturing location. This document supersedes and replaces all information supplied prior to the publication hereof. Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights.