X-On Electronics has gained recognition as a prominent supplier of BUL128D-B Bipolar Transistors - BJT across the USA, India, Europe, Australia, and various other global locations. BUL128D-B Bipolar Transistors - BJT are a product manufactured by STMicroelectronics. We provide cost-effective solutions for Bipolar Transistors - BJT, ensuring timely deliveries around the world.

BUL128D-B STMicroelectronics

BUL128D-B electronic component of STMicroelectronics
BUL128D-B STMicroelectronics
BUL128D-B Bipolar Transistors - BJT
BUL128D-B  Semiconductors

Images are for reference only
See Product Specifications
Part No. BUL128D-B
Manufacturer: STMicroelectronics
Category: Bipolar Transistors - BJT
Description: Bipolar (BJT) Transistor NPN 400 V 4 A 70 W Through Hole TO-220
Datasheet: BUL128D-B Datasheet (PDF)
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges



Price (USD)
1: USD 0.5478 ea
Line Total: USD 0.55 
Availability - 218
Ship by Mon. 03 Feb to Thu. 06 Feb
MOQ: 1  Multiples: 1
Pack Size: 1
Availability Price Quantity
218
Ship by Mon. 03 Feb to Thu. 06 Feb
MOQ : 1
Multiples : 1
1 : USD 0.5478
10 : USD 0.4648
50 : USD 0.4189
100 : USD 0.3673
500 : USD 0.345
1000 : USD 0.3344
2000 : USD 0.3303

11
Ship by Thu. 23 Jan to Mon. 27 Jan
MOQ : 1
Multiples : 1
1 : USD 0.798
10 : USD 0.6804
36 : USD 0.476
100 : USD 0.448
250 : USD 0.441

   
Manufacturer
Product Category
RoHS - XON
Icon ROHS
Mounting Style
Package / Case
Transistor Polarity
Configuration
Maximum DC Collector Current
Collector- Emitter Voltage VCEO Max
Collector- Base Voltage VCBO
Emitter- Base Voltage VEBO
Pd - Power Dissipation
Minimum Operating Temperature
Maximum Operating Temperature
Series
Packaging
Brand
Dc Collector/Base Gain Hfe Min
Height
Length
Width
Cnhts
Hts Code
Mxhts
Product Type
Factory Pack Quantity :
Subcategory
Taric
LoadingGif
 
Notes:- Show Stocked Products With Similar Attributes.

We are delighted to provide the BUL128D-B from our Bipolar Transistors - BJT category, at competitive rates not only in the United States, Australia, and India, but also across Europe and beyond. A long established and extensive electronic component distribution network has enhanced our global reach and dependability, ensuring cost savings through prompt deliveries worldwide. Client satisfaction is at the heart of our business, where every component counts and every customer matters. Our technical service team is ready to assist you. From product selection to after-sales support, we strive to deliver a seamless and satisfying experience. Are you ready to experience the best in electronic component distribution? Contact X-ON Electronics today and discover why X-On are a preferred choice for the BUL128D-B and other electronic components in the Bipolar Transistors - BJT category and beyond.

Image Part-Description
Stock Image SMAJ130CA-TR
STMicroelectronics TVS Diodes - Transient Voltage Suppressors 400W 130V Bidirect
Stock : 1529
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Stock Image BAT43
Diode: Schottky rectifying; THT; 30V; 0.2A; DO35; Ufmax:0.45V
Stock : 28000
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Stock Image SM6T24A
Diode: transil; 600W; 24V; 18A; unidirectional; ±5%; SMB
Stock : 5000
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Stock Image ESDA5-1BF4
STMicroelectronics TVS Diodes - Transient Voltage Suppressors
Stock : 10
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Stock Image ESDAVLC6-1V2
ESD Suppressors / TVS Diodes Single line low capacitance Transil for ESD protection
Stock : 20000
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Stock Image ESDZV5-1BF4
ESD Suppressors / TVS Diodes Ultra Low clamping single line bidirectional ESD protection
Stock : 60000
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Stock Image P6KE47CA
Diode: transil; 600W; 44.7V; 9.7A; bidirectional; DO15
Stock : 14000
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Stock Image SMBJ70CA-TR
TVS Diodes - Transient Voltage Suppressors 600W 70V Bidirect
Stock : 85000
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Stock Image SMBJ58A-TR
TVS Diodes - Transient Voltage Suppressors 600W 58V Unidirect
Stock : 2500
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Stock Image SMAJ40A-TR
TVS Diodes - Transient Voltage Suppressors 400W 40V Unidirect
Stock : 40000
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Image Part-Description
Stock Image 2N5401
Central Semiconductor Bipolar Transistors - BJT PNP Gen Pr Amp
Stock : 1
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Stock Image 2SD1898T100Q
Bipolar (BJT) Transistor NPN 80 V 1 A 100MHz 2 W Surface Mount MPT3
Stock : 200
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Stock Image MJE170G
Bipolar (BJT) Transistor PNP 40 V 3 A 50MHz 1.5 W Through Hole TO-126
Stock : 264
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Stock Image FMMT551TA
Bipolar Transistors - BJT PNP Medium Power
Stock : 308
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Stock Image BC807DS,115
Transistors Bipolar - BJT TRANS DOUBLE TAPE-7
Stock : 14098
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Stock Image NSS60601MZ4T3G
ON Semiconductor Bipolar Transistors - BJT 60V6A LOW VCE(SAT) NPN
Stock : 1
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Stock Image KSC2330YTA
Bipolar (BJT) Transistor NPN 300 V 100 mA 50MHz 1 W Through Hole TO-92-3
Stock : 0
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Stock Image CMUT2907A TR
Central Semiconductor Bipolar Transistors - BJT PNP
Stock : 8901
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Stock Image 2SC4117-BL,LF
Bipolar Transistors - BJT Transistor for Low Freq. Amplification
Stock : 1
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.
Stock Image 2N4401
Trans GP BJT NPN 40V 0.6A 3-Pin TO-92 Bulk
Stock : 0
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

BUL128D-B HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTOR n STMicroelectronics PREFERRED SALES Figure 1: Package TYPE n NPN TRANSISTOR n HIGH VOLTAGE CAPABILITY n LOW SPREAD OF DYNAMIC PARAMETERS n MINIMUM LOT-TO-LOT SPREAD FOR RELIABLE OPERATION n VERY HIGH SWITCHING SPEED n INTEGRATED ANTIPARALLEL 3 COLLECTOR- EMITTER DIODE 2 1 TO-220 APPLICATIONS n ELECTRONIC BALLAST FOR FLUORESCENT LIGHTING Figure 2: Internal Schematic Diagram n FLYBACK AND FORWARD SINGLE TRANSISTOR LOW POWER CONVERTERS DESCRIPTION The device is manufactured using high voltage Multi Epitaxial Planar technology for high switching speeds and medium voltage capability. It uses a Cellular Emitter structure with planar edge termination to enhance switching speeds while maintaining the wide RBSOA. The device is designed for use in lighting applications and low cost switch-mode power supplies. Table 1: Order Codes Part Number Marking Package Packaging BUL128D-B BUL128D-B TO-220 Tube Table 2: Absolute Maximum Ratings Symbol Parameter Value Unit V Collector-Emitter Voltage (V = 0) 700 V CES BE V Collector-Emitter Voltage (I = 0) 400 V CEO B Emitter-Base Voltage V V V EBO (BR)EBO o (I = 0, I = 2 A, t < 10 s, T = 150 C) C B p J I Collector Current 4A C I Collector Peak Current (t < 5ms) 8A CM p I Base Current 2A B I Base Peak Current (t < 5ms) 4A BM p Rev. 2 February 2005 1/8BUL128D-B Symbol Parameter Value Unit o P Total Dissipation at T = 25 C 70 W tot C T Storage Temperature -65 to 150 C stg T Max. Operating Junction Temperature 150 C J Table 3: Thermal Data o R Thermal Resistance Junction-Case Max 1.78 thj-case C/W Thermal Resistance Junction-Ambient Max 62.5 o R thj-amb C/W o Table 4: Electrical Characteristics (T = 25 C unless otherwise specified) case Symbol Parameter Test Conditions Min. Typ. Max. Unit I Collector Cut-off Current V = 700 V 100 A CES CE (V = 0 V) o 500 A BE V =700 V T = 125 C CE j I Collector Cut-off Current V = 400 V 250 A CEO CE (I = 0) B V Emitter-Base I = 10 mA 9 18 V (BR)EBO E Breakdown Voltage (I = 0 ) C V * Collector-Emitter I = 100 mA L = 25 mH 400 V CEO(sus) C Sustaining Voltage (I = 0 ) B V * Collector-Emitter I = 0.5 A I = 0.1 A 0.7 V CE(sat) C B Saturation Voltage 1 V I = 1 A I = 0.2 A C B 1.5 V I = 2.5 A I = 0.5 A C B 0.5 V I = 4 A I = 1 A C B V * Base-Emitter Saturation I = 0.5 A I = 0.1 A 1.1 V BE(sat) C B Voltage 1.2 V I = 1 A I = 0.2 A C B 1.3 V I = 2.5 A I = 0.5 A C B h * DC Current Gain I = 10 mA V = 5 V 10 FE C CE 12 32 I = 2 A V = 5 V C CE RESISTIVE LOAD V =200 V I = 2 A CC C t Storage Time 0.6 s I = 0.4 A V = -5 V s B1 BE(off) Fall Time 0.1 s t f R = 0 W L = 200 H BB (see figure 15) INDUCTIVE LOAD V =250 V I = 2 A CC C t Storage Time 2 2.9 s s I = 0.4 A I = -0.4 A B1 B2 Fall Time 0.2 s t Tp = 30 s (see figure 14) f * Pulsed: Pulsed duration = 300 ms, duty cycle 1.5 % 2/8

Tariff Desc

8541.21.00 16 No - - With a dissipation rate of less than 1 W Free

DIODES, TRANSISTORS AND SIMILAR SEMICONDUCTOR DEVICES; PHOTOSENSITIVE SEMICONDUCTOR DEVICES,
C-Max (VA)
SG3
ST
ST MICROELECTRONICS
ST2
ST7
STM
STMICRELECTRONICS
STN
Trusted Retailer for 7F32000E06UCG SMD Crystal Resonators by SJK image

Nov 8, 2024
The 7F32000E06UCG SMD Crystal Resonator by SJK is a high-precision component ideal for applications needing stable timing, such as microcontroller clocks, communication modules, and consumer electronics. Packaged in a compact SMD-2016_4P format, it offers excellent frequency tolerance (±10 ppm) a
Best Supplier of PX0725/30/63 AC Power Entry Modules in USA image

Jun 26, 2024

Xon Electronic has emerged as a leading supplier of PX0725/30/63 in USA, Australia, India, Europe and other countries, series of AC power entry modules. Xon Electronic stands out as the best supplier for these components, exploring their features

RBMTXLITE-L4X2.X.W.X.X. Ethernet Modules Retailer in India image

Sep 2, 2024
Xon Electronic stands as the premier global retailer for the RBMTXLITE-L4X2.X.W.X.X. Ethernet Module by TELEORIGIN. This high-performance 4G LTE router offers a compact design, robust metal enclosure, and a data rate of up to 150Mbps, making it ideal for various applications, from industrial automa
206305-1 Standard Circular Connector Retailer in India, USA image

Oct 16, 2024
The 206305-1 Standard Circular Connector by TE Connectivity is a 37-position plug with a shell size of 23, designed for demanding applications in aerospace, defense, industrial automation, and telecommunications. This high-performance connector offers gold-plated contacts for superior conductiv

Looking for help? Visit our FAQ's Section to answer to all your questions

 

X-ON Worldwide Electronics

Welcome To X-ON Electronics
For over three decades, we have been advocating and shaping the electronic components industry. Our management complements our worldwide business scope and focus. We are committed to innovation, backed by a strong business foundation. If you need a trustworthy supplier of electronic components for your business – look no further.
 

Copyright ©2025  X-ON Electronics Services. All rights reserved.
Please ensure you have read and understood our Terms & Conditions before purchasing. All prices exclude GST.

Image for all the cards that are accepted Image for all the cards that are accepted Image for all the cards that are accepted Image for all the cards that are accepted Image for all the cards that are accepted AS9120 Certified