2SA1943 Datasheet. Specs and Replacement
The 2SA1943 is a PNP power bipolar junction transistor widely used in high-fidelity audio amplifiers. Built for high current handling, it provides a collector current up to 15A and a collector-emitter voltage rating of 230V, making it suitable for robust output stages. Its complementary pair is the 2SC5200 NPN transistor. The device offers good linearity, low distortion, efficient heat dissipation when mounted on an adequate heatsink. With high gain bandwidth and reliable thermal stability, the 2SA1943 remains a standard choice for Class-AB audio power designs.
Type Designator: 2SA1943 📄📄
Material of Transistor: Si
Polarity: PNP
Absolute Maximum Ratings
Maximum Collector Power Dissipation (Pc): 150 W
Maximum Collector-Base Voltage |Vcb|: 230 V
Maximum Collector-Emitter Voltage |Vce|: 230 V
Maximum Emitter-Base Voltage |Veb|: 5 V
Maximum Collector Current |Ic max|: 15 A
Max. Operating Junction Temperature (Tj): 150 °C
Electrical Characteristics
Transition Frequency (ft): 30 MHz
Collector Capacitance (Cc): 360 pF
Forward Current Transfer Ratio (hFE), MIN: 55
Noise Figure, dB: -
Package: TO264
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2SA1943 datasheet
..1. Size:133K toshiba
2sa1943.pdf 
2SA1943 TOSHIBA Transistor Silicon PNP Triple Diffused Type 2SA1943 Power Amplifier Applications Unit mm High collector voltage VCEO = -230 V (min) Complementary to 2SC5200 Recommended for 100-W high-fidelity audio frequency amplifier output stage. Absolute Maximum Ratings (Ta = 25 C) Characteristics Symbol Rating Unit Collector-base voltage VCBO -230 V Coll... See More ⇒
..2. Size:487K fairchild semi
2sa1943 fjl4215.pdf
January 2009 2SA1943/FJL4215 PNP Epitaxial Silicon Transistor Applications High-Fidelity Audio Output Amplifier General Purpose Power Amplifier Features High Current Capability IC = -17A. High Power Dissipation 150watts. TO-264 1 High Frequency 30MHz. 1.Base 2.Collector 3.Emitter High Voltage VCEO= -250V Wide S.O.A for reliable operation. Ex... See More ⇒
..3. Size:182K utc
2sa1943.pdf
UNISONIC TECHNOLOGIES CO., LTD 2SA1943 PNP SILICON TRANSISTOR POWER AMPLIFIER APPLICATIONS FEATURES * Complementary to UTC 2SC5200 * Recommended for 100W High Fidelity Audio Frequency Amplifier Output Stage 1 TO-3PL ORDERING INFORMATION Ordering Number Pin Assignment Package Packing Lead Free Halogen Free 1 2 3 2SA1943L-x-T3L-T 2SA1943G-x-T3L-T TO-3PL B C E Tube 2SA... See More ⇒
..4. Size:198K jmnic
2sa1943.pdf
JMnic Product Specification Silicon PNP Power Transistors 2SA1943 DESCRIPTION With TO-3PL package Complement to type 2SC5200 APPLICATIONS Power amplifier applications Recommended for 100W high fidelity audio frequency amplifier output stage PINNING PIN DESCRIPTION 1 Emitter Collector;connected to 2 mounting base Fig.1 simplified outline (TO-3PL) and symbol ... See More ⇒
..6. Size:848K cn evvo
2sa1943.pdf
Silicon NPN transistor Features Power Amplifier Applications Complementary to 2SC5200 High collector voltage VCEO=230V (min) Recommended for 100-W high-fidelity audio frequency amplifier Output stage Note Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the significant change in temperature, etc.) may cause this produc... See More ⇒
..7. Size:145K cn minos
2sa1943.pdf
2SA1943 Minos High Power Products PNP TRANSISTORS Features Power Amplifier Applications Complementaryto2SC5200 Highcollector voltage VCEO=-230V (min) Recommendedfor 100-Whigh-fidelity audiofrequency amplifier Output stage Note Using continuously under heavy loads (e.g. theapplication of hightemperature/current/voltageandthe significant change in temperature, etc.) may causethis pro... See More ⇒
..8. Size:204K inchange semiconductor
2sa1943.pdf
isc Silicon PNP Power Transistor 2SA1943 DESCRIPTION High Current Capability High Power Dissipation High Collector-Emitter Breakdown Voltage- V =- 230V(Min) (BR)CEO Complement to Type 2SC5200 Minimum Lot-to-Lot variations for robust device performance and reliable operation APPLICATIONS Power amplifier applications Recommend for 100W high fidelity audio frequency amp... See More ⇒
0.1. Size:156K toshiba
2sa1943n.pdf
2SA1943N Bipolar Transistors Silicon PNP Triple-Diffused Type 2SA1943N 2SA1943N 2SA1943N 2SA1943N 1. Applications 1. Applications 1. Applications 1. Applications Power Amplifiers 2. Features 2. Features 2. Features 2. Features (1) High collector voltage VCEO = -230 V (min) (2) Complementary to 2SC5200N (3) Recommended for 100-W high-fidelity audio frequency amplifier outpu... See More ⇒
0.3. Size:330K onsemi
2sa1943rtu 2sa1943otu fjl4215rtu fjl4215otu.pdf
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 nomenclatur... See More ⇒
0.4. Size:219K nell
2sa1943bl.pdf
RoHS 2SA1943BL Series RoHS SEMICONDUCTOR Nell High Power Products Silicon PNP triple diffusion planar transistor -15A/-230V/150W 5.00 20.00 0.20 18.00 3.30 0.20 TO-3PL FEATURES High breakdown voltage, VCEO = -230V (min) Complementary to 2SC5200BL 0.60 3.20 TO-3PL package which can be installed to the 5.45 0.05 5.45 0.05 heat sink with one screw 1 2 3 APPLICATIONS S... See More ⇒
0.5. Size:1806K cn sps
2sa1943t7tl.pdf
2SA1943T7TL Silicon PNP Power Transistor DESCRIPTION High Collector-Emitter Breakdown Voltage- V = -230V(Min) (BR)CEO Complement to Type 2SC5200 APPLICATIONS Power amplifier applications Recommended for 100W high fidelity audio frequency amplifier output stage ABSOLUTE MAXIMUM RATINGS(Ta=25 ) SYMBOL PARAMETER VALUE UNIT V Collector-Base Voltage -230 V CBO V Collector-... See More ⇒
0.6. Size:425K cn sptech
2sa1943r 2sa1943o.pdf
SPTECH Product Specification SPTECH Silicon PNP Power Transistor 2SA1943 DESCRIPTION High Collector-Emitter Breakdown Voltage- V = -230V(Min) (BR)CEO Complement to Type 2SC5200 APPLICATIONS Power amplifier applications Recommended for 100W high fidelity audio frequency amplifier output stage ABSOLUTE MAXIMUM RATINGS(Ta=25 ) SYMBOL PARAMETER VALUE UNIT V Collector-Base V... See More ⇒
0.7. Size:214K inchange semiconductor
2sa1943n.pdf
isc Silicon PNP Power Transistor 2SA1943N DESCRIPTION High Current Capability High Power Dissipation High Collector-Emitter Breakdown Voltage- V = -230V(Min) (BR)CEO Complement to Type 2SC5200N Minimum Lot-to-Lot variations for robust device performance and reliable operation APPLICATIONS Power amplifier applications Recommend for 100W high fidelity audio frequency a... See More ⇒
Detailed specifications: ZXTP2027F, ZXTP2029F, ZXTP2039F, ZXTP25060BFH, ZXTP25100BFH, ZXTP25100CFH, ZXTP25100CZ, ZXTP722MA, BC556, 2SC5200, BDW94CF, FJA13009, FJA4210, FJA4213, FJA4310, FJA4313, FJB102
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