Please enter a valid full or partial manufacturer part number with a minimum of 3 letters or numbers

    BD679 Search Results

    SF Impression Pixel

    BD679 Price and Stock

    onsemi BD679AS

    TRANS NPN DARL 80V 4A TO126-3
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey BD679AS Bulk 7,269 1
    • 1 $1.17
    • 10 $0.73
    • 100 $1.17
    • 1000 $0.33757
    • 10000 $0.25728
    Buy Now
    Avnet Americas BD679AS Bulk 10 Weeks 4,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.27377
    Buy Now
    Mouser Electronics BD679AS 32,470
    • 1 $0.75
    • 10 $0.609
    • 100 $0.394
    • 1000 $0.307
    • 10000 $0.248
    Buy Now
    Newark BD679AS Bulk 2,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 $0.33
    • 10000 $0.259
    Buy Now
    Onlinecomponents.com BD679AS 3,500
    • 1 -
    • 10 -
    • 100 $0.2964
    • 1000 $0.2837
    • 10000 $0.247
    Buy Now
    Avnet Silica BD679AS 11 Weeks 2,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now
    Flip Electronics BD679AS 1,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote
    Master Electronics BD679AS 3,500
    • 1 -
    • 10 -
    • 100 $0.2964
    • 1000 $0.2837
    • 10000 $0.247
    Buy Now

    STMicroelectronics BD679

    TRANS NPN DARL 80V 4A SOT32-3
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey BD679 Tube 5,251 1
    • 1 $0.79
    • 10 $0.79
    • 100 $0.79
    • 1000 $0.21794
    • 10000 $0.16186
    Buy Now
    Avnet Americas BD679 Tube 14 Weeks 6,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.12877
    Buy Now
    Mouser Electronics BD679 5,425
    • 1 $0.61
    • 10 $0.322
    • 100 $0.286
    • 1000 $0.201
    • 10000 $0.153
    Buy Now
    Verical BD679 12,697 37
    • 1 -
    • 10 -
    • 100 $0.2754
    • 1000 $0.2754
    • 10000 $0.2754
    Buy Now
    BD679 1,255 1,255
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.1478
    Buy Now
    Arrow Electronics BD679 12,697 14 Weeks 1
    • 1 $0.4984
    • 10 $0.3566
    • 100 $0.2886
    • 1000 $0.1746
    • 10000 $0.1559
    Buy Now
    BD679 1,255 14 Weeks 2,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.1478
    Buy Now
    Newark BD679 Bulk 598 1
    • 1 $0.51
    • 10 $0.409
    • 100 $0.304
    • 1000 $0.193
    • 10000 $0.151
    Buy Now
    STMicroelectronics BD679 5,425 1
    • 1 $0.6
    • 10 $0.32
    • 100 $0.28
    • 1000 $0.22
    • 10000 $0.22
    Buy Now
    Future Electronics BD679 Tube 8,400 14 Weeks 50
    • 1 -
    • 10 -
    • 100 $0.156
    • 1000 $0.149
    • 10000 $0.133
    Buy Now
    BD679 Tube 14 Weeks 4,000
    • 1 $0.149
    • 10 $0.149
    • 100 $0.149
    • 1000 $0.139
    • 10000 $0.127
    Buy Now
    BD679 Tube 14 Weeks 8,000
    • 1 -
    • 10 -
    • 100 $0.149
    • 1000 $0.142
    • 10000 $0.127
    Buy Now
    Bristol Electronics BD679 73 7
    • 1 -
    • 10 $0.825
    • 100 $0.5363
    • 1000 $0.5363
    • 10000 $0.5363
    Buy Now
    Quest Components BD679 58
    • 1 $1.1
    • 10 $0.88
    • 100 $0.55
    • 1000 $0.55
    • 10000 $0.55
    Buy Now
    TME BD679 708 1
    • 1 $0.455
    • 10 $0.392
    • 100 $0.281
    • 1000 $0.206
    • 10000 $0.206
    Buy Now
    ComSIT USA BD679 3,420
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote
    Avnet Silica BD679 9,950 15 Weeks 50
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now
    EBV Elektronik BD679 900 15 Weeks 50
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now

    STMicroelectronics BD679A

    TRANS NPN DARL 80V 4A SOT32-3
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey BD679A Tube 3,975 1
    • 1 $1.03
    • 10 $1.03
    • 100 $1.03
    • 1000 $0.29196
    • 10000 $0.22063
    Buy Now
    Avnet Americas BD679A Tube 14 Weeks 4,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.21274
    Buy Now
    Mouser Electronics BD679A 3,823
    • 1 $0.66
    • 10 $0.405
    • 100 $0.364
    • 1000 $0.268
    • 10000 $0.211
    Buy Now
    Verical BD679A 54,234 37
    • 1 -
    • 10 -
    • 100 $0.3507
    • 1000 $0.2719
    • 10000 $0.1815
    Buy Now
    BD679A 2,000 2,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.1991
    Buy Now
    Arrow Electronics BD679A 54,234 14 Weeks 1
    • 1 $0.6122
    • 10 $0.4655
    • 100 $0.3492
    • 1000 $0.2707
    • 10000 $0.1807
    Buy Now
    BD679A 3,500 14 Weeks 2,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.1991
    Buy Now
    Newark BD679A Bulk 195 5
    • 1 $0.63
    • 10 $0.513
    • 100 $0.373
    • 1000 $0.274
    • 10000 $0.209
    Buy Now
    STMicroelectronics BD679A 3,823 1
    • 1 $0.65
    • 10 $0.4
    • 100 $0.36
    • 1000 $0.29
    • 10000 $0.29
    Buy Now
    TME BD679A 3,415 1
    • 1 $0.417
    • 10 $0.361
    • 100 $0.289
    • 1000 $0.229
    • 10000 $0.184
    Buy Now
    ComSIT USA BD679A 7,092
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote
    Avnet Silica BD679A 1,000 15 Weeks 50
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now
    EBV Elektronik BD679A 10,400 15 Weeks 50
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now

    onsemi BD679

    TRANS NPN DARL 80V 4A TO126
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey BD679 Bulk 500
    • 1 -
    • 10 -
    • 100 -
    • 1000 $0.30564
    • 10000 $0.30564
    Buy Now

    Rochester Electronics LLC BD679G

    TRANS NPN DARL 80V 4A TO126
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey BD679G Bulk 814
    • 1 -
    • 10 -
    • 100 -
    • 1000 $0.37
    • 10000 $0.37
    Buy Now

    BD679 Datasheets (90)

    Part ECAD Model Manufacturer Description Curated Datasheet Type PDF
    BD679 Central Semiconductor Darlington Bipolar Transistor, NPN, 80V, TO-126, 3-Pin Original PDF
    BD679 Continental Device India NPN PLASTIC POWER DARLINGTON TRANSISTORS Original PDF
    BD679 Continental Device India NPN Plastic Power Transistors Original PDF
    BD679 Motorola Plastic Medium-Power Silicon NPN Darlingtons Original PDF
    BD679 On Semiconductor TRANS DARLINGTON NPN 80V 4A 3TO-225AA BOX Original PDF
    BD679 Philips Semiconductors Silicon Darlington Power Transistor Original PDF
    BD679 STMicroelectronics TRANS DARLINGTON NPN 80V 4A 3SOT-32 Original PDF
    BD679 STMicroelectronics Complementary power Darlington transistors Original PDF
    BD679 STMicroelectronics COMPLEMENTARY SILICON POWER DARLINGTON TRANSISTORS Original PDF
    BD679 STMicroelectronics COMPLEMENTARY SILICON POWER DARLINGTON TRANSISTOR Original PDF
    BD679 STMicroelectronics complementary darlington power transistor Original PDF
    BD679 Transys Electronics NPN PLASTIC POWER DARLINGTON TRANSISTORS Original PDF
    BD679 Various Russian Datasheets Transistor Original PDF
    BD 679 Infineon Technologies TRANS DARLINGTON NPN 80V 4A 3TO-126 Scan PDF
    BD679 Motorola Motorola Semiconductor Data & Cross Reference Book Scan PDF
    BD679 Motorola Motorola Transistor Datasheets Scan PDF
    BD679 Motorola The European Selection Data Book 1976 Scan PDF
    BD679 Motorola European Master Selection Guide 1986 Scan PDF
    BD679 Mullard Quick Reference Guide 1977/78 Scan PDF
    BD679 Unknown Basic Transistor and Cross Reference Specification Scan PDF

    BD679 Datasheets Context Search

    Catalog Datasheet MFG & Type PDF Document Tags

    bd679 PNP transistor

    Abstract: BD679 BD680
    Text: Power Transistors www.jmnic.com BD680 Silicon PNP Transistors Features ECB With TO-126 package In monolithic Darlington configuration This transistor is intended for use in medium power linar and switching applications Complement to type BD679 Absolute Maximum Ratings Tc=25


    Original
    PDF BD680 O-126 BD679 O-126 bd679 PNP transistor BD679 BD680

    Untitled

    Abstract: No abstract text available
    Text: BD676A/678A/680A/682 BD676A/678A/680A/682 Medium Power Linear and Switching Applications • Medium Power Darlington TR • Complement to BD675A, BD677A, BD679A and BD681 respectively TO-126 1 PNP Epitaxial Silicon Transistor 1. Emitter 2.Collector 3.Base


    Original
    PDF BD676A/678A/680A/682 BD675A, BD677A, BD679A BD681 BD676A BD678A BD680A BD682

    BD675A

    Abstract: BD676A BD677A BD678A BD679A BD680A BD681 BD682
    Text: BD676A/678A/680A/682 BD676A/678A/680A/682 Medium Power Linear and Switching Applications • Medium Power Darlington TR • Complement to BD675A, BD677A, BD679A and BD681 respectively TO-126 1 PNP Epitaxial Silicon Transistor 1. Emitter 2.Collector 3.Base


    Original
    PDF BD676A/678A/680A/682 BD675A, BD677A, BD679A BD681 O-126 BD676A BD678A BD680A BD675A BD676A BD677A BD678A BD680A BD682

    BD675-BD677-BD679-BD681

    Abstract: BD681A transistor BD677 BD677 BD677 transistor BD675 BD681 transistor BD681 BD679
    Text: NPN BD675/A - BD677/A - BD679/A - BD681/A SILICON DARLINGTON POWER TRANSISTORS The BD675/A-BD677/A-BD679/A-BD681/A are NPN They are eptaxial-base transistors in monolithic Darlington circuit for audio and video applications. They are mounted in Jedec TO-126 plastic package.


    Original
    PDF BD675/A BD677/A BD679/A BD681/A BD675/A-BD677/A-BD679/A-BD681/A O-126 BD676/A-BD678/A-BD680/A-BD682/A BD675/A BD677/A BD679/A BD675-BD677-BD679-BD681 BD681A transistor BD677 BD677 BD677 transistor BD675 BD681 transistor BD681 BD679

    Untitled

    Abstract: No abstract text available
    Text: BD675, BD675A, BD677, BD677A, BD679, BD679A, BD681 Plastic Medium-Power Silicon NPN Darlingtons This series of plastic, medium−power silicon NPN Darlington transistors can be used as output devices in complementary general−purpose amplifier applications.


    Original
    PDF BD675, BD675A, BD677, BD677A, BD679, BD679A, BD681 BD675/D

    TO126 package

    Abstract: BD683 darlington power pack pin configuration NPN transistor BD679 to-126 transistor BD675 BD675A BD676 BD677 BD677A
    Text: Continental Device India Limited IS/ISO 9002 Lic# QSC/L- 000019.3 An IS/ISO 9002 and IECQ Certified Manufacturer NPN PLASTIC POWER DARLINGTON TRANSISTORS BD675, BD675A BD677, BD677A BD679, BD679A BD681, BD683 TO126 Plastic Package EC B Complementary BD676, 676A, 678, 678A, 680, 680A, 682 & 684


    Original
    PDF BD675, BD675A BD677, BD677A BD679, BD679A BD681, BD683 BD676, BD675 TO126 package BD683 darlington power pack pin configuration NPN transistor BD679 to-126 transistor BD675 BD675A BD676 BD677 BD677A

    BD681G

    Abstract: to225aa BD681 EQUIVALENT bd675g BD679 transistor BD681 BD681 BD679G BD679AG BD676
    Text: BD675, BD675A, BD677, BD677A, BD679, BD679A, BD681 BD681 is a Preferred Device Plastic Medium-Power Silicon NPN Darlingtons This series of plastic, medium−power silicon NPN Darlington transistors can be used as output devices in complementary general−purpose amplifier applications.


    Original
    PDF BD675, BD675A, BD677, BD677A, BD679, BD679A, BD681 BD681 BD676, BD681G to225aa BD681 EQUIVALENT bd675g BD679 transistor BD681 BD679G BD679AG BD676

    BD679

    Abstract: No abstract text available
    Text: BD675, BD675A, BD677, BD677A, BD679, BD679A, BD681 BD681 is a Preferred Device Plastic Medium-Power Silicon NPN Darlingtons This series of plastic, medium−power silicon NPN Darlington transistors can be used as output devices in complementary general−purpose amplifier applications.


    Original
    PDF BD675, BD675A, BD677, BD677A, BD679, BD679A, BD681 BD681 BD676, BD679

    Untitled

    Abstract: No abstract text available
    Text: BD679 Transistors NPN Darlington Transistor Military/High-RelN V BR CEO (V)80 V(BR)CBO (V)100 I(C) Max. (A)4.0 Absolute Max. Power Diss. (W)40 Maximum Operating Temp (øC)150õ I(CBO) Max. (A)200u @V(CBO) (V) (Test Condition)80 h(FE) Min. Current gain.750


    Original
    PDF BD679 Freq10M

    BD679

    Abstract: BD681G bd681 TRANSISTOR transistor bd681 BD679G to225aa bd677 TRANSISTOR bd681 9 435 BD675 BD675G
    Text: BD675, BD675A, BD677, BD677A, BD679, BD679A, BD681 BD681 is a Preferred Device Plastic Medium−Power Silicon NPN Darlingtons This series of plastic, medium−power silicon NPN Darlington transistors can be used as output devices in complementary general−purpose amplifier applications.


    Original
    PDF BD675, BD675A, BD677, BD677A, BD679, BD679A, BD681 BD681 BD676, BD679 BD681G bd681 TRANSISTOR transistor bd681 BD679G to225aa bd677 TRANSISTOR bd681 9 435 BD675 BD675G

    pin configuration NPN transistor BD679

    Abstract: 2SC101 pin configuration NPN transistor BD 677 BU108 TIP120 equivalent 2SC7 2N6052 equivalent 2SC558 BDX54 2SC1943
    Text: MOTOROLA SEMICONDUCTOR TECHNICAL DATA BD675 BD675A BD677 BD677A BD679 BD679A BD681* Plastic Medium-Power Silicon NPN Darlingtons . . . for use as output devices in complementary general–purpose amplifier applications. • High DC Current Gain — hFE = 750 Min @ IC = 1.5 and 2.0 Adc


    Original
    PDF BD675, BD676, BD675 BD675A BD677 BD677A BD679 BD679A BD681* TIP73B pin configuration NPN transistor BD679 2SC101 pin configuration NPN transistor BD 677 BU108 TIP120 equivalent 2SC7 2N6052 equivalent 2SC558 BDX54 2SC1943

    bd6792

    Abstract: BD67929EFV
    Text: Motor Drivers for Printers Three-phase Brushless Motor Driver for Polygonal Mirrors [For LBP, PPC] BD67929EFV No.10016EAT05 ●Description BD67929EFV is a 3-phase brushless motor driver for polygon mirror motors of direct PWM drive type built-in PLL ensuring.


    Original
    PDF BD67929EFV 10016EAT05 BD67929EFV bd6792

    bd6792

    Abstract: transistor f483 F483 chart polygon mirror motor BD67929EFV
    Text: Motor Drivers for Printers Three-phase Brushless Motor Driver for Polygonal Mirrors [For LBP, PPC] BD67929EFV No.10016EAT05 ●Description BD67929EFV is a 3-phase brushless motor driver for polygon mirror motors of direct PWM drive type built-in PLL ensuring.


    Original
    PDF BD67929EFV 10016EAT05 BD67929EFV R1010A bd6792 transistor f483 F483 chart polygon mirror motor

    pin configuration NPN transistor BD679

    Abstract: BD675 BD675A BD676 BD677 BD677A BD679 BD679A BD681 BD683
    Text: Continental Device India Limited An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company NPN PLASTIC POWER DARLINGTON TRANSISTORS BD675, BD675A BD677, BD677A BD679, BD679A BD681, BD683 TO126 Plastic Package EC B Complementary BD676, 676A, 678, 678A, 680, 680A, 682 & 684


    Original
    PDF BD675, BD675A BD677, BD677A BD679, BD679A BD681, BD683 BD676, BD675 pin configuration NPN transistor BD679 BD675 BD675A BD676 BD677 BD677A BD679 BD679A BD681 BD683

    bd677 datasheet

    Abstract: BD679 BD677 BD675 NPN POWER DARLINGTON TRANSISTORS
    Text: Inchange Semiconductor Product Specification Silicon NPN Darligton Power Transistors BD675/BD677/BD679 ・ DESCRIPTION ・With TO-126 package ・Complement to type BD676/678/680 ・DARLINGTON ・High DC current gain APPLICATIONS ・For use as output devices in


    Original
    PDF BD675/BD677/BD679 O-126 BD676/678/680 BD675 BD677 BD679 bd677 datasheet BD679 BD677 BD675 NPN POWER DARLINGTON TRANSISTORS

    to126 case

    Abstract: BD139 BD136
    Text: Power Transistors TO-126 Case Top View TYPE NO. NPN 2N4921 2N4922 2N4923 2N5190 2N5191 2N5192 2N5655 2N5656 2N5657 2N6037 2N6038 2N6039 BD135 BD137 BD139 BD175 BD177 BD179 BD233 BD235 BD237 BD433 BD435 BD437 BD439 BD441 BD675 BD675A BD677 BD677A BD679 BD679A


    Original
    PDF O-126 610-2N4923 2N4923 to126 case BD139 BD136

    Untitled

    Abstract: No abstract text available
    Text: BD675, BD675A, BD677, BD677A BD679, BD679A, BD681 BD675, 675A, 677, 677A, 679, 679A, 681 NPN PLASTIC POWER TRANSISTORS, Medium Power Darlingtons Complementary BD676, 676A, 678, 678A, 680, 680A, 682 PIN CONFIGURATION 1. EMITTER 2. COLLECTOR 3. BASE DIM MIN.


    OCR Scan
    PDF BD675, BD675A, BD677, BD677A BD679, BD679A, BD681 BD676,

    IC AL 6001 audio ic

    Abstract: transistor 684 B0680 BD676 5559 transistor BD680 B0680 DIODE bd679 PNP transistor 684 k 100 BD675
    Text: BD676; 678 J ^ BD680; 682; 684 SILICON DARLINGTON POWER TRANSISTORS P-N-P epitaxial-base transistors in monolithic Darlington circuit for audio and video output applications; SOT-32 plastic envelope. N-P-N complements are BD675, BD677, BD679, BD681 and BD683.


    OCR Scan
    PDF BD676; BD680; OT-32 BD675, BD677, BD679, BD681 BD683. BD676 00344S3 IC AL 6001 audio ic transistor 684 B0680 5559 transistor BD680 B0680 DIODE bd679 PNP transistor 684 k 100 BD675

    bd676a

    Abstract: BD678A
    Text: BD676A/678A/680A/682 PNP EPITAXIAL SILICON TRANSISTOR MEDIUM POWER DARLINGTON TR MEDIUM POWER LINEAR AND SWITCHING APPLICATIONS TO-126 • Complement to BD675A, BD677A, BD679A and BD681 respectively ABSOLUTE MAXIMUM RATINGS Characteristic Rating Symbol Collector Base Voltage


    OCR Scan
    PDF BD676A/678A/680A/682 BD675A, BD677A, BD679A BD681 O-126 BD676A BD680A BD682 BD678A

    80681

    Abstract: B0679 BD679 coil BD675 BD675A BD676 BD677 BD677A BD679 BD679A
    Text: BD675, BD675A, BD677, BD677A BD679, BD679A, BD681 BD675, 675A, 677, 677A, 679, 679A, 681 NPN PLASTIC POWER TRANSISTORS, Medium Power Darlingtons Complementary BD676, 676A, 678, 678A, 680, 680A, 682 PIN CO N FIG UR ATIO N 1. EM ITTER 2. C O L L E C T O R 3. B A S E


    OCR Scan
    PDF BD675, BD675A, BD677, BD677A BD679, BD679A, BD681 BD676, 80681 B0679 BD679 coil BD675 BD675A BD676 BD677 BD679 BD679A

    Untitled

    Abstract: No abstract text available
    Text: v is s a s ? QoeaM si S G S - T U O M S O N î[L[lCT ^ [M D©S b B D 6 7 5 /7 5 A /7 7 /7 7 A /7 9 /7 9 A /8 1 B D 6 7 6 /7 6 A /7 8 /7 8 A /8 0 /8 0 A /8 2 S G S-THOMSON 3DE » MEDIUM POWER DARLINGTONS DESCRIPTION The BD675, BD675A, BD677, BD677A, BD679,


    OCR Scan
    PDF BD675, BD675A, BD677, BD677A, BD679, BD679A BD681 O-126 BD676, BD676A,

    Untitled

    Abstract: No abstract text available
    Text: _ J V BD676; 678 BD680; 682; 684 SILICON DARLINGTON POWER TRANSISTORS P-N-P epitaxial-base transistors in monolithic Darlington circuit fo r audio and video output applications; SOT-32 plastic envelope. N-P-N complements are BD675, BD677, BD679, BD681 and BD683.


    OCR Scan
    PDF BD676; BD680; OT-32 BD675, BD677, BD679, BD681 BD683. BD676

    BD679

    Abstract: BD675 BD680 T-988 BD676 BD678 BD682 BD684 D0344
    Text: BD675; 677 BD679; 681; 683 SILICON DARLINGTON POWER TRANSISTORS N-P-N epitaxial-base transistors in monolithic Darlington circuit fo r audio and video applications; SOT-32 plastic envelope. P-N-P complements are BD676, BD678, BD680, BD682 and BD684. QUICK REFERENCE DATA


    OCR Scan
    PDF BD675; BD679 OT-32 BD676, BD678, BD680, BD682 BD684. BD675 BD680 T-988 BD676 BD678 BD684 D0344

    bd681 TRANSISTOR

    Abstract: transistor BD681 n999
    Text: BD676A/678A/680A/682 PNP EPITAXIAL SILICON TRANSISTOR MEDIUM POWER DARLINGTON TR MEDIUM POWER LINEAR AND SWITCHING APPLICATIONS • Complement to BD675A, BD677A, BD679A and BD681 respectively ABSOLUTE MAXIMUM RATINGS C haracteristic Rating Unit -4 5 V : BD678A


    OCR Scan
    PDF BD676A/678A/680A/682 BD675A, BD677A, BD679A BD681 BD678A BD680A BD682 bd681 TRANSISTOR transistor BD681 n999