We use Cookies to give you best experience on our website. By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies. Please see our Privacy Policy for more information.

Register or Sign In
Transistors / Small Signal Bipolar Transistors / BF259
Datasheets
BF259 by:
Continental Device India Ltd
Baneasa SA
Central Semiconductor Corp
Continental Device India Ltd
Crimson Semiconductor Inc
Freescale Semiconductor
Micro Electronics Corporation
Micro Electronics Ltd
Motorola Mobility LLC
Motorola Semiconductor Products
National Semiconductor Corporation
New Jersey Semiconductor Products Inc
Semiconductors Inc
SGS Semiconductor Ltd
SPC Multicomp
STMicroelectronics
Tesla Elektronicke Soucastky
Texas Instruments
TT Electronics Power and Hybrid / Semelab Limited
TT Electronics Resistors
Not Found

Small Signal Bipolar Transistor, 0.1A I(C), 300V V(BR)CEO, 1-Element, NPN, Silicon, TO-39

Part Details for BF259 by Continental Device India Ltd

Results Overview of BF259 by Continental Device India Ltd

Tip: Data for a part may vary between manufacturers. You can filter for manufacturers on the top of the page next to the part image and part number.

Applications Industrial Automation Motor control systems

BF259 Information

BF259 by Continental Device India Ltd is a Small Signal Bipolar Transistor.
Small Signal Bipolar Transistors are under the broader part category of Transistors.

A transistor is a small semiconductor device used to amplify, control, or create electrical signals. When selecting a transistor, factors such as voltage, current rating, gain, and power dissipation must be considered, with common types. Read more about Transistors on our Transistors part category page.

Price & Stock for BF259

Part # Distributor Description Stock Price Buy
DISTI # BF259-CDI
TME Transistor: NPN, bipolar, 300V, 0.1A, 1/5W, TO39 Min Qty: 1 1460
  • 1 $0.8340
  • 5 $0.6910
  • 25 $0.4150
  • 100 $0.3730
  • 500 $0.3300
$0.3300 / $0.8340 Buy Now

Part Details for BF259

BF259 CAD Models

There are no models available for this part yet.

Sign in to request this CAD model.

Register or Sign In

BF259 Part Data Attributes

Parametric Data
BF259 Continental Device India Ltd
Buy Now Datasheet
Compare Parts:
BF259 Continental Device India Ltd Small Signal Bipolar Transistor, 0.1A I(C), 300V V(BR)CEO, 1-Element, NPN, Silicon, TO-39
Select a part to compare:
Rohs Code No
Part Life Cycle Code Active
Ihs Manufacturer CONTINENTAL DEVICE INDIA LTD
Reach Compliance Code compliant
ECCN Code EAR99
Collector Current-Max (IC) 0.1 A
Collector-Emitter Voltage-Max 300 V
Configuration SINGLE
DC Current Gain-Min (hFE) 25
JEDEC-95 Code TO-39
JESD-30 Code O-MBCY-W3
JESD-609 Code e0
Number of Elements 1
Number of Terminals 3
Operating Temperature-Max 175 °C
Package Body Material METAL
Package Shape ROUND
Package Style CYLINDRICAL
Polarity/Channel Type NPN
Power Dissipation-Max (Abs) 5 W
Qualification Status Not Qualified
Surface Mount NO
Terminal Finish Tin/Lead (Sn/Pb)
Terminal Form WIRE
Terminal Position BOTTOM
Transistor Element Material SILICON
Transition Frequency-Nom (fT) 110 MHz
VCEsat-Max 1 V

Alternate Parts for BF259

This table gives cross-reference parts and alternative options found for BF259. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of BF259, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.

Part Number Manufacturer Composite Price Description Compare
BF259.MOD TT Electronics Power and Hybrid / Semelab Limited Check for Price 100mA, 300V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-205AD, HERMETIC SEALED, METAL, TO-39, 3 PIN BF259 vs BF259.MOD
Part Number Manufacturer Composite Price Description Compare
BF259.MODG4 TT Electronics Power and Hybrid / Semelab Limited Check for Price 100mA, 300V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-205AD, HERMETIC SEALED, METAL, TO-39, 3 PIN BF259 vs BF259.MODG4
BF259 Central Semiconductor Corp Check for Price Small Signal Bipolar Transistor, 0.1A I(C), 300V V(BR)CEO, 1-Element, NPN, Silicon, TO-39, TO-39, 3 PIN BF259 vs BF259
BF259 TT Electronics Resistors Check for Price Small Signal Bipolar Transistor, 0.1A I(C), 300V V(BR)CEO, 1-Element, NPN, Silicon, TO-205AD, HERMETIC SEALED, METAL, TO-39, 3 PIN BF259 vs BF259
BF259 Baneasa SA Check for Price Small Signal Bipolar Transistor, 0.1A I(C), 1-Element, NPN, Silicon, TO-39, TO-39, 3 PIN BF259 vs BF259
BF259 Motorola Semiconductor Products Check for Price Small Signal Bipolar Transistor, 0.1A I(C), 300V V(BR)CEO, 1-Element, NPN, Silicon, TO-39 BF259 vs BF259
MJ421 Central Semiconductor Corp Check for Price Small Signal Bipolar Transistor, 0.1A I(C), 325V V(BR)CEO, 1-Element, NPN, Silicon, TO-39, TO-39, 3 PIN BF259 vs MJ421
BF259G4 TT Electronics Resistors Check for Price Small Signal Bipolar Transistor, 0.1A I(C), 300V V(BR)CEO, 1-Element, NPN, Silicon, TO-205AD, HERMETIC SEALED, METAL, TO-39, 3 PIN BF259 vs BF259G4
MM421 onsemi Check for Price TRANSISTOR 1000 mA, 325 V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-39, TO-39, 3 PIN, BIP General Purpose Small Signal BF259 vs MM421

BF259 Related Parts

BF259 Frequently Asked Questions (FAQ)

  • The maximum safe operating area (SOA) for the BF259 is not explicitly stated in the datasheet, but it can be estimated based on the device's thermal resistance, maximum junction temperature, and voltage ratings. As a general guideline, the SOA for a transistor like the BF259 is typically limited by the maximum voltage and current ratings, as well as the thermal constraints.

  • To ensure the reliability of the BF259 in high-temperature applications, it's essential to follow proper derating guidelines, ensure good thermal management (e.g., using a heat sink), and avoid operating the device near its maximum ratings. Additionally, consider using a transistor with a higher temperature rating or a more robust package, such as a metal-can or ceramic package.

  • For optimal performance and reliability, it's recommended to follow good PCB layout practices, such as keeping the transistor away from heat sources, using a solid copper ground plane, and ensuring good thermal conductivity between the transistor and the heat sink (if used). A thermal via or thermal pad can also be used to improve heat dissipation.

  • Yes, the BF259 can be used in switching applications, but it's essential to consider the device's switching characteristics, such as the transition frequency, rise and fall times, and switching losses. Additionally, ensure that the device is properly biased, and the switching frequency is within the recommended range to avoid overheating or premature failure.

  • The selection of resistor values for the BF259's base and collector circuits depends on the specific application, operating conditions, and desired performance. As a general guideline, the base resistor should be chosen to provide the required base current, while the collector resistor should be selected to ensure the desired collector current and voltage drop. Consult the datasheet and application notes for more information.