Part Details for BF259 by STMicroelectronics
Results Overview of BF259 by STMicroelectronics
- Distributor Offerings: (3 listings)
- Number of FFF Equivalents: (0 replacements)
- CAD Models: (Request Part)
- Number of Functional Equivalents: (8 options)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
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 STMicroelectronics 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 | |
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Quest Components | TRANSISTOR,BJT,NPN,300V V(BR)CEO,100MA I(C),TO-205AD | 400 |
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$1.0140 / $3.1200 | Buy Now |
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Quest Components | TRANSISTOR,BJT,NPN,300V V(BR)CEO,100MA I(C),TO-205AD | 146 |
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$0.8250 / $1.6500 | Buy Now |
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Quest Components | TRANSISTOR,BJT,NPN,300V V(BR)CEO,100MA I(C),TO-205AD | 80 |
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$0.8250 / $1.6500 | Buy Now |
Part Details for BF259
BF259 CAD Models
BF259 Part Data Attributes
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BF259
STMicroelectronics
Buy Now
Datasheet
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Compare Parts:
BF259
STMicroelectronics
300V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-39
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| Pbfree Code | No | |
| Rohs Code | No | |
| Part Life Cycle Code | Obsolete | |
| Ihs Manufacturer | STMICROELECTRONICS | |
| Reach Compliance Code | not_compliant | |
| ECCN Code | EAR99 | |
| Samacsys Manufacturer | STMicroelectronics | |
| 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 | |
| Terminal Form | WIRE | |
| Terminal Position | BOTTOM | |
| Transistor Element Material | SILICON | |
| Transition Frequency-Nom (fT) | 90 MHz |
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 | 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 | Micro Electronics Corporation | 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 | Micro Electronics Ltd | 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 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 |
| 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 |
| 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 | 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 Frequently Asked Questions (FAQ)
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The maximum SOA for the BF259 is not explicitly stated in the datasheet, but it can be estimated based on the device's thermal resistance and maximum junction temperature. As a general rule, it's recommended to keep the device within the specified absolute maximum ratings to ensure reliable operation.
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To ensure proper biasing, follow the recommended biasing circuit and component values provided in the datasheet. Additionally, consider the device's current gain (hFE) and base-emitter voltage (VBE) when designing the biasing circuit. It's also important to ensure the device is operated within its recommended operating conditions.
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For optimal thermal performance, use a PCB layout that allows for good heat dissipation. This can include using a thermal pad or heat sink, and ensuring good airflow around the device. The datasheet provides guidelines for thermal resistance and junction-to-ambient thermal resistance, which can help inform the PCB design.
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To prevent electrostatic discharge (ESD) damage, follow proper handling and storage procedures for the BF259. This includes using ESD-safe materials, grounding yourself before handling the device, and storing the device in an ESD-safe environment. The datasheet may also provide specific ESD protection recommendations.
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The BF259's reliability and lifespan are influenced by factors such as operating conditions, storage conditions, and handling practices. The datasheet provides information on the device's reliability, including its mean time to failure (MTTF) and failure rate. Additionally, following proper handling and storage procedures can help extend the device's lifespan.