Is Now Part of To learn more about ON Semiconductor, please visit our website at www.onsemi.com Please note: As part of the Fairchild Semiconductor integration, some of the Fairchild orderable part numbers will need to change in order to meet ON Semiconductor’s system requirements. Since the ON Semiconductor product management systems do not have the ability to manage part nomenclature that utilizes an underscore (_), the underscore (_) in the Fairchild part numbers will be changed to a dash (-). This document may contain device numbers with an underscore (_). Please check the ON Semiconductor website to verify the updated device numbers. The most current and up-to-date ordering information can be found at www.onsemi.com. Please email any questions regarding the system integration to Fairchild_questions@onsemi.com. ON Semiconductor and the ON Semiconductor logo are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.

K S T 4 July 2014 2 / K S T 4 3 KST42 / KST43 — N NPN Epitaxial Silicon Transistor P N E p Features i t a • High-Voltage Transistor 3 xi a l S i 2 li c o SOT-23 1 n 1. Base 2. Emitter 3. Collector T r a n s Ordering Information i s t o r Part Number Marking Package Packing Method KST42MTF 1D SOT-23 3L Tape and Reel KST43MTF 1E SOT-23 3L Tape and Reel Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera- ble above the recommended operating conditions and stressing the parts to these levels is not recommended. In addi- tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Values are at T = 25°C unless otherwise noted. A Symbol Parameter Value Unit KST42 300 V Collector-Base Voltage V CBO KST43 200 KST42 300 V Collector-Emitter Voltage V CEO KST43 200 V Emitter-Base Voltage 6 V EBO I Collector Current - Continuous 500 mA C T T Junction and Storage Temperature Range -55 to +150 °C J , STG Thermal Characteristics Values are at T = 25°C unless otherwise noted. A Symbol Parameter Max. Unit P Collector Power Dissipation 350 mW C RθJA Thermal Resistance, Junction to Ambient 357 °C/W © 2002 Fairchild Semiconductor Corporation www.fairchildsemi.com KST42 / KST43 Rev. 1.1.0

K S Electrical Characteristics T 4 Values are at T = 25°C unless otherwise noted. 2 A / K Symbol Parameter Conditions Min. Max. Unit S T VCBO CVoolltlaegcetor-Base Breakdown KKSSTT4432 IC = 100 μA, IE = 0 320000 V 43 — Collector-Emitter Breakdown KST42 300 V I = 1 mA, I = 0 V N CEO Voltage(1) KST43 C B 200 P N VEBO Emitter-Base Breakdown Voltage IE = 100 μA, IC = 0 6 V E I Collector Cut-Off Current V = 200 V, I = 0 0.1 μA p CBO CB E i t I Emitter Cut-Off Current V = 5 V, I = 0 0.1 μA a EBO EB C x i V = 10 V, I = 1 mA 25 a CE C l h DC Current Gain(1) V = 10 V, I = 10 mA 40 S FE CE C i l i V = 10 V, I = 30 mA 40 c CE C o V (sat) Collector-Emitter Saturation Voltage(1) I = 20 mA, I = 2 mA 0.5 V n CE C B T VBE(sat) Base-Emitter Saturation Voltage(1) IC = 20 mA, IB = 2 mA 0.9 V ra C Output Capacitance KST42 VCB = 20 V, IE = 0, 3 pF ns ob KST43 f = 1 MHz 4 is t o f Current Gain Bandwidth Product VCE = 20 V, IC = 10 mA, 50 MHz r T f = 100 MHz Note: 1. Pulse test: pulse width ≤ 300 μs, duty cycle ≤ 2%. © 2002 Fairchild Semiconductor Corporation www.fairchildsemi.com KST42 / KST43 Rev. 1.1.0 2

K S Typical Performance Characteristics T 4 2 / K 1000 GE 10 S TA IC = 10 IB T L 4 O V 3 N ON — URRENT GAI 100 VCE = 10V V], SATURATI 1 VBE(sat) NPN E C C at)[ 0.1 VCE(sat) p h, DFE sat), V(sCE itaxia 10 V(BE 0.01 l S 1 10 100 1 10 100 i l i c IC[mA], COLLECTOR CURRENT IC[mA], COLLECTOR CURRENT o n Figure 1. DC Current Gain Figure 2. Collector-Emitter Saturation Voltage and T Base-Emitter Saturation Voltage r a n s is 100 t o IE = 0 CT 120 r f = 1MHz DU O R 100 E P APACITANC 10 MHz],ANDWIDTH 6800 VCE = 20V pF], C f[TAIN B 40 C [cb NT G E 20 R R U 1 C 0 0.1 1 10 100 1 10 100 VCB [V], COLLECTOR-BASE VOLTAGE IC[mA], COLLECTOR CURRENT Figure 3. Collector-Base Capacitance Figure 4. Current Gain Bandwidth Product © 2002 Fairchild Semiconductor Corporation www.fairchildsemi.com KST42 / KST43 Rev. 1.1.0 3

K S Physical Dimensions T 4 2 / K S T 4 3 0.95 2.92±0.20 — 3 N 1.40 P N E p +0.20 1.30 2.20 i -0.15 ta x i a l S 1 2 i (0.29) 0.60 lic 0.95 0.37 o 0.20 A B 1.00 n 1.90 1.90 T r a LAND PATTERN n RECOMMENDATION s i s t 1.20 MAX SEE DETAIL A o r (0.93) 0.10 0.00 0.10 C C 2.40±0.30 NOTES: UNLESS OTHERWISE SPECIFIED GAGE PLANE A) REFERENCE JEDEC REGISTRATION TO-236, VARIATION AB, ISSUE H. 0.23 B) ALL DIMENSIONS ARE IN MILLIMETERS. 0.08 C) DIMENSIONS ARE INCLUSIVE OF BURRS, 0.25 MOLD FLASH AND TIE BAR EXTRUSIONS. D) DIMENSIONING AND TOLERANCING PER ASME Y14.5M - 1994. 0.20 MIN SEATING E) DRAWING FILE NAME: MA03DREV10 (0.55) PLANE SCALE: 2X Figure 5. 3-LEAD, SOT23, JEDEC TO-236, LOW PROFILE (ACTIVE) Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/dwg/MA/MA03D.pdf. For current tape and reel specifications, visit Fairchild Semiconductor’s online packaging area: http://www.fairchildsemi.com/packing_dwg/PKG-MA03D.pdf. © 2002 Fairchild Semiconductor Corporation www.fairchildsemi.com KST42 / KST43 Rev. 1.1.0 4

TRADEMARKS The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global subsidiaries, and is not intended to be an exhaustive list of all such trademarks. AccuPower(cid:2) F-PFS(cid:2) AX-CAP®* FRFET® ® ®* BitSiC(cid:2) Global Power ResourceSM PowerTrench® TinyBoost® Build it Now(cid:2) GreenBridge(cid:2) PowerXS™ TinyBuck® CorePLUS(cid:2) Green FPS(cid:2) Programmable Active Droop(cid:2) TinyCalc(cid:2) CorePOWER(cid:2) Green FPS(cid:2) e-Series(cid:2) QFET® TinyLogic® CROSSVOLT(cid:2) Gmax(cid:2) QS(cid:2) TINYOPTO(cid:2) CTL(cid:2) GTO(cid:2) Quiet Series(cid:2) TinyPower(cid:2) Current Transfer Logic(cid:2) IntelliMAX(cid:2) RapidConfigure(cid:2) TinyPWM(cid:2) DEUXPEED® ISOPLANAR(cid:2) (cid:2) TinyWire(cid:2) Dual Cool™ Making Small Speakers Sound Louder TranSiC(cid:2) EcoSPARK® and Better™ Saving our world, 1mW/W/kWat a time™ TriFault Detect(cid:2) EfficientMax(cid:2) MegaBuck(cid:2) SignalWise(cid:2) TRUECURRENT®* ESBC(cid:2) MICROCOUPLER(cid:2) SmartMax(cid:2) (cid:3)SerDes(cid:2) ® MicroFET(cid:2) SMART START(cid:2) FFFFFFFFaAPAAEaasiiCSCSTrrtccB(cid:2)TvTThhC®e® iiQll noddcur ®eShi e(cid:2)(cid:2)et m Siecroiensd(cid:2)uc tor® MMMMmOOOPpPWioiilcclttTTerroiSooorOOHDnPaPPLiMvrTaaOieLkvk(cid:2)arAe2(cid:2)G®x (cid:2)N(cid:2) (cid:2)I CA ®R ® SSSSSSSSSuTouuPuuypnpplppEMuecereeAte®rFirrrSoL FMSSEnOTEOOTOsHTT(cid:2) TTSf(cid:2)(cid:2)®o(cid:2)(cid:2) ® -r 3-- Y68 our Success(cid:2) UUUVVVXCioSHlnstrli™XuCtFaaa(cid:2)E ®g Fl MTe R(cid:2)PaFlx uE(cid:2) sT(cid:2)(cid:2) Sync-Lock™ (cid:3037)(cid:10106)™ * Trademarks of System General Corporation, used under license by Fairchild Semiconductor. DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are 2. A critical component in any component of a life support, device, or intended for surgical implant into the body or (b) support or sustain system whose failure to perform can be reasonably expected to life, and (c) whose failure to perform when properly used in cause the failure of the life support device or system, or to affect its accordance with instructions for use provided in the labeling, can be safety or effectiveness. reasonably expected to result in a significant injury of the user. ANTI-COUNTERFEITING POLICY Fairchild Semiconductor Corporation's Anti-Counterfeiting Policy. Fairchild's Anti-Counterfeiting Policy is also stated on our external website, www.fairchildsemi.com, under Sales Support. Counterfeiting of semiconductor parts is a growing problem in the industry. All manufacturers of semiconductor products are experiencing counterfeiting of their parts. Customers who inadvertently purchase counterfeit parts experience many problems such as loss of brand reputation, substandard performance, failed applications, and increased cost of production and manufacturing delays. Fairchild is taking strong measures to protect ourselves and our customers from the proliferation of counterfeit parts. Fairchild strongly encourages customers to purchase Fairchild parts either directly from Fairchild or from Authorized Fairchild Distributors who are listed by country on our web page cited above. Products customers buy either from Fairchild directly or from Authorized Fairchild Distributors are genuine parts, have full traceability, meet Fairchild's quality standards for handling and storage and provide access to Fairchild's full range of up-to-date technical and product information. Fairchild and our Authorized Distributors will stand behind all warranties and will appropriately address any warranty issues that may arise. Fairchild will not provide any warranty coverage or other assistance for parts bought from Unauthorized Sources. Fairchild is committed to combat this global problem and encourage our customers to do their part in stopping this practice by buying direct or from authorized distributors. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Product Status Definition Datasheet contains the design specifications for product development. Specifications may change Advance Information Formative / In Design in any manner without notice. Datasheet contains preliminary data; supplementary data will be published at a later date. Fairchild Preliminary First Production Semiconductor reserves the right to make changes at any time without notice to improve design. Datasheet contains final specifications. Fairchild Semiconductor reserves the right to make No Identification Needed Full Production changes at any time without notice to improve the design. Datasheet contains specifications on a product that is discontinued by Fairchild Semiconductor. Obsolete Not In Production The datasheet is for reference information only. Rev. I68 © Fairchild Semiconductor Corporation www.fairchildsemi.com

ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: N. American Technical Support: 800−282−9855 Toll Free ON Semiconductor Website: www.onsemi.com Literature Distribution Center for ON Semiconductor USA/Canada 19521 E. 32nd Pkwy, Aurora, Colorado 80011 USA Europe, Middle East and Africa Technical Support: Order Literature: http://www.onsemi.com/orderlit Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Phone: 421 33 790 2910 Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Japan Customer Focus Center For additional information, please contact your local Email: orderlit@onsemi.com Phone: 81−3−5817−1050 Sales Representative © Semiconductor Components Industries, LLC www.onsemi.com www.onsemi.com 1

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: O N Semiconductor: KST42MTF KST42MTF_Q