BD139 Specs and Replacement
The BD139 is a widely used NPN bipolar junction transistor designed for medium-power applications. Housed in a TO126 package, it supports a collector current up to 1.5A and a collector-emitter voltage of 80V. Its gain typically ranges from 40 to 160, making it suitable for linear amplification and switching. With good thermal stability and a moderate power dissipation rating (around 12.5W with proper heatsinking), the BD139 is commonly used in audio stages, voltage regulators, driver circuits. Its reliability and versatility make it a staple in analog and power-control designs.
Type Designator: BD139
Material of Transistor: Si
Polarity: NPN
Absolute Maximum Ratings
Maximum Collector Power Dissipation (Pc): 12.5
W
Maximum Collector-Base Voltage |Vcb|: 100
V
Maximum Collector-Emitter Voltage |Vce|: 80
V
Maximum Emitter-Base Voltage |Veb|: 5
V
Maximum Collector Current |Ic max|: 1.5
A
Max. Operating Junction Temperature (Tj): 150
°C
Electrical Characteristics
Transition Frequency (ft): 50
MHz
Forward Current Transfer Ratio (hFE), MIN: 40
Noise Figure, dB: -
Package:
TO126
-
BJT ⓘ Cross-Reference Search
BD139 datasheet
..1. Size:100K motorola
bd135 bd137 bd139.pdf 

Order this document MOTOROLA by BD135/D SEMICONDUCTOR TECHNICAL DATA BD135 BD137 Plastic Medium Power Silicon BD139 NPN Transistor . . . designed for use as audio amplifiers and drivers utilizing complementary or quasi complementary circuits. 1.5 AMPERE POWER TRANSISTORS DC Current Gain hFE = 40 (Min) @ IC = 0.15 Adc NPN SILICON BD 135, 137, 139 are complementary with... See More ⇒
..2. Size:49K philips
bd135 bd137 bd139 3.pdf 

DISCRETE SEMICONDUCTORS DATA SHEET book, halfpage M3D100 BD135; BD137; BD139 NPN power transistors 1999 Apr 12 Product specification Supersedes data of 1997 Mar 04 Philips Semiconductors Product specification NPN power transistors BD135; BD137; BD139 FEATURES PINNING High current (max. 1.5 A) PIN DESCRIPTION Low voltage (max. 80 V). 1 emitter 2 collector, connected to m... See More ⇒
..3. Size:44K st
bd135 bd137 bd139.pdf 

BD135 BD137/BD139 NPN SILICON TRANSISTORS SGS-THOMSON PREFERRED SALESTYPES DESCRIPTION The BD135, BD137 and BD139 are silicon epitaxial planar NPN transistors in Jedec SOT-32 plastic package, designed for audio amplifiers and drivers utilizing complementary or quasi compementary circuits. The complementary PNP types are the BD136 1 2 BD138 and BD140. 3 SOT-32 INTERNAL SCHEMATIC... See More ⇒
..4. Size:141K st
bd135 bd135-16 bd136 bd136-16 bd139 bd139-10 bd139-16 bd140 bd140-10 bd140-16.pdf 

BD135 - BD136 BD139 - BD140 Complementary low voltage transistor Features Products are pre-selected in DC current gain Application General purpose 1 2 3 Description SOT-32 These epitaxial planar transistors are mounted in the SOT-32 plastic package. They are designed for audio amplifiers and drivers utilizing complementary or quasi-complementary circuits. The NPN typ... See More ⇒
..5. Size:155K st
bd135 bd136 bd139 bd140.pdf 

BD135 - BD136 BD139 - BD140 Complementary low voltage transistor Features Products are pre-selected in DC current gain Application General purpose 1 2 3 Description SOT-32 These epitaxial planar transistors are mounted in the SOT-32 plastic package. They are designed for audio amplifiers and drivers utilizing complementary or quasi-complementary circuits. The NPN typ... See More ⇒
..6. Size:74K st
bd135 bd139.pdf 

BD135 BD139 NPN SILICON TRANSISTORS Type Marking BD135 BD135 BD135-10 BD135-10 BD135-16 BD135-16 BD139 BD139 BD139-10 BD139-10 BD139-16 BD139-16 1 2 STMicroelectronics PREFERRED 3 SALESTYPES SOT-32 DESCRIPTION The BD135 and BD139 are silicon Epitaxial Planar NPN transistors mounted in Jedec SOT-32 plastic package, designed for audio amplifiers and drivers utilizing com... See More ⇒
..7. Size:41K fairchild semi
bd135 bd137 bd139.pdf 

BD135/137/139 Medium Power Linear and Switching Applications Complement to BD136, BD138 and BD140 respectively TO-126 1 1. Emitter 2.Collector 3.Base NPN Epitaxial Silicon Transistor Absolute Maximum Ratings TC=25 C unless otherwise noted Symbol Parameter Value Units VCBO Collector-Base Voltage BD135 45 V BD137 60 V BD139 80 V VCEO Collector-Emitter Voltage BD135 ... See More ⇒
..8. Size:51K samsung
bd135 bd137 bd139.pdf 

BD135/137/139 NPN EPITAXIAL SILICON TRANSISTOR MEDIUM POWER LINEAR AND TO-126 SWITCHING APPLICATIONS Complement to BD136, BD138 and BD140 respectively ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Rating Unit Collector Base Voltage BD135 VCBO 45 V BD137 60 V BD139 80 V Collector Emitter Voltage BD135 VCEO 45 V BD137 60 V BD139 80 V 1. Emitter 2.Collector 3.Bas... See More ⇒
..9. Size:196K onsemi
bd135 bd137 bd139.pdf 

BD135 / 137 / 139 NPN Epitaxial Silicon Transistor Features Complement to BD136, BD138 and BD140 respectively Applications Medium Power Linear and Switching TO-126 1 1. Emitter 2.Collector 3.Base Ordering Information Part Number Marking Package Packing Method BD13516S BD135-16 Bulk BD1356STU BD135-6 BD13510STU BD135-10 BD13516STU BD135-16 Rail BD13716STU BD137-16 BD13710... See More ⇒
..10. Size:135K utc
bd139.pdf 

UNISONIC TECHNOLOGIES CO., LTD BD139 NPN SILICON TRANSISTOR NPN POWER TRANSISTORS FEATURES * High current (max.1.5A) 1 * Low voltage (max.80V) TO-251 1 TO-126 ORDERING INFORMATION Ordering Number Pin Assignment Package Packing Lead Free Halogen Free 1 2 3 BD139L-xx-T60-K BD139G-xx-T60-K TO-126 E C B Bulk BD139L-xx-TM3-T BD139G-xx-TM3-T TO-251 B C E Tube BD139L-xx... See More ⇒
..11. Size:246K cdil
bd135 bd137 bd139.pdf 

Continental Device India Limited An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company NPN EPITAXIAL SILICON POWER TRANSISTORS BD135 BD137 BD139 TO126 Plastic Package E C B Designed for use as Audio Amplifier and Drivers Utilizing Complementary BD136, BD138, BD140 ABSOLUTE MAXIMUM RATINGS DESCRIPTION SYMBOL BD135 BD137 BD139 UNIT Collector -Emitter Voltage VCEO 45 60 80 V Col... See More ⇒
..12. Size:931K jiangsu
bd135 bd137 bd139.pdf 

JIANGSU CHANGJING ELECTRONICS TECHNOLOGY CO., LTD TO-126 Plastic-Encapsulate Transistors BD135 / BD137 / BD139 TRANSISTOR (NPN) TO 126 FEATURES 1. EMITTER High Current Complement To BD136, BD138 And BD140 2. COLLECTOR 3. BASE Equivalent Circuit BD135 BD137 BD139 XX XX XX BD135,BD137,BD139=Device code Solid dot = Green molding compound device, if none,... See More ⇒
..13. Size:31K kec
bd139.pdf 

SEMICONDUCTOR BD139 TECHNICAL DATA EPITAXIAL PLANAR NPN TRANSISTOR GENERAL PURPOSE APPLICATION. A B D C FEATURES E High Current. (Max. 1.5A) F DC Current Gain hFE=40Min. @IC=0.15A Complementary to BD140. G H DIM MILLIMETERS J A 8.3 MAX K B 5.8 L C 0.7 _ + D 3.2 0.1 MAXIMUM RATING (Ta=25 ) E 3.5 _ + F 11.0 0.3 CHARACTERISTIC SYMBOL RATING UNIT G 2.9 M... See More ⇒
..14. Size:191K lge
bd135 bd137 bd139.pdf 

BD135/BD137/BD139(NPN) TO-126 Transistor TO-126 1. EMITTER 2. COLLECTOR 3. BASE 3 2 1 Features High Current(1.5A) Low Voltage(80V) 2.500 7.400 Dimensions in inches and (millimeters) 2.900 1.100 MAXIMUM RATINGS (TA=25 unless otherwise noted ) 7.800 1.500 Va3.900 lue 3.000 Symbol Parameter 4.100 Units 3.200 BD135 BD137 BD139 10.600 0.000 11.000 0... See More ⇒
..15. Size:329K wietron
bd135 bd137 bd139.pdf 

BD135/137/139 NPN Epitaxial Planar Transistors 1. EMITTER 2. COLLECTOR P b Lead(Pb)-Free 3. BASE 1 2 3 TO-126 ABSOLUTE MAXIMUM RATINGS(TA=25 C) Rating Symbol BD135 BD137 BD139 Unit VCBO 45 60 80 V Collector-Emitter Voltage VCEO 45 60 80 V Collector-Base Voltage VEBO Emitter-Base Voltage 5.0 5.0 5.0 V Collector Current IC 1.5 A PD 1.25 W Power Disspation Tj 150 C Ju... See More ⇒
..16. Size:813K slkor
bd139.pdf 

BD139 NPN Silicon NPN transistor / Descriptions TO-126 NPN Silicon NPN transistor in a TO-126 Plastic Package. / Features / Applications BD140 Complement to BD140 Medium power linear and switching applications / Equivalent Circuit ... See More ⇒
..17. Size:207K inchange semiconductor
bd139.pdf 

isc Silicon NPN Power Transistor BD139 DESCRIPTION DC Current Gain- h = 40(Min)@ I = 0.15A FE C Collector-Emitter Sustaining Voltage - V = 80V(Min) CEO(SUS) Complement to type BD140 Minimum Lot-to-Lot variations for robust device performance and reliable operation APPLICATIONS Designed for use as audio amplifiers and drivers utilizing complementary or quasi complement... See More ⇒
..18. Size:117K inchange semiconductor
bd135 bd137 bd139.pdf 

Inchange Semiconductor Product Specification Silicon NPN Power Transistors BD135 BD137 BD139 DESCRIPTION With TO-126 package High current Complement to type BD136/138/140 APPLICATIONS Driver stages in high-fidelity amplifiers and television circuits PINNING PIN DESCRIPTION 1 Emitter Collector;connected to 2 mounting base 3 Base Absolute maximum ratings (T... See More ⇒
0.1. Size:128K onsemi
bd135g bd137g bd139g.pdf 

BD135G, BD137G, BD139G Plastic Medium-Power Silicon NPN Transistors This series of plastic, medium-power silicon NPN transistors are designed for use as audio amplifiers and drivers utilizing complementary or quasi complementary circuits. http //onsemi.com Features 1.5 A POWER TRANSISTORS High DC Current Gain NPN SILICON BD 135, 137, 139 are complementary with BD 136, 138, 14... See More ⇒
0.2. Size:80K onsemi
bd139g bd135tg bd135g bd137g.pdf 

BD135G, BD137G, BD139G Plastic Medium-Power Silicon NPN Transistors This series of plastic, medium-power silicon NPN transistors are designed for use as audio amplifiers and drivers utilizing complementary or quasi complementary circuits. http //onsemi.com Features 1.5 A POWER TRANSISTORS High DC Current Gain NPN SILICON BD 135, 137, 139 are complementary with BD 136, 138, 14... See More ⇒
0.4. Size:80K secos
bd135-bd137-bd139.pdf 

BD135 / BD137 / BD139 NPN Plastic Encapsulated Transistor Elektronische Bauelemente RoHS Compliant Product A suffix of -C specifies halogen & lead-free FEATURES TO-126 High current Complement to BD136, BD138 and BD140 1Emitter 1 1 1 2Collector 2 2 2 3Base 3 3 3 CLASSIFICATION OF hFE (1) A Product-Rank BD135-6 BD135-10 BD135-16 B E F Product-Rank BD13... See More ⇒
0.5. Size:454K semtech
stbd135t stbd137t stbd139t.pdf 

BD135T / BD137T / BD139T NPN SILICON EPITAXIAL POWER TRANSISTOR These devices are designed as Audio Amplifier and Drivers Utilizing. E C B TO-126 Plastic Package O Absolute Maximum Ratings (Ta=25 C) Value Parameter Symbol Unit BD135T BD137T BD139T Collector Emitter Voltage VCEO 45 60 80 V Collector Emitter Voltage ( RBE = 1 K ) VCER 45 60 100 V Collector Base Vo... See More ⇒
Detailed specifications: BD137-10
, BD137-16
, BD137-6
, BD137G
, BD138
, BD138-10
, BD138-6
, BD138G
, 2N3055
, BD139-10
, BD139-16
, BD139-6
, BD139G
, BD140
, BD140-10
, BD140-16
, BD140-6
.
History: 2N271
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