Part Details for BD139 by Philips Semiconductors
Results Overview of BD139 by Philips Semiconductors
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BD139 Information
BD139 by Philips Semiconductors is an Other Transistor.
Other 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.
Part Details for BD139
BD139 CAD Models
BD139 Part Data Attributes
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BD139
Philips Semiconductors
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Datasheet
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BD139
Philips Semiconductors
Transistor,
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| Rohs Code | No | |
| Part Life Cycle Code | Transferred | |
| Ihs Manufacturer | PHILIPS SEMICONDUCTORS | |
| Reach Compliance Code | unknown | |
| ECCN Code | EAR99 | |
| Collector Current-Max (IC) | 1.5 A | |
| Configuration | SINGLE | |
| DC Current Gain-Min (hFE) | 40 | |
| JESD-609 Code | e0 | |
| Number of Elements | 1 | |
| Operating Temperature-Max | 150 °C | |
| Polarity/Channel Type | NPN | |
| Power Dissipation-Max (Abs) | 8 W | |
| Surface Mount | NO | |
| Terminal Finish | Tin/Lead (Sn/Pb) | |
| Transition Frequency-Nom (fT) | 250 MHz |
BD139 Frequently Asked Questions (FAQ)
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The maximum safe operating temperature for the BD139 is 150°C, but it's recommended to operate it at a maximum of 120°C to ensure reliability and longevity.
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While the BD139 can be used as a switch, it's not suitable for high-frequency applications due to its relatively high transition frequency (ft) of 30 MHz. For high-frequency applications, consider using a transistor with a higher ft, such as the BD239 or a dedicated high-frequency transistor.
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To ensure proper biasing for linear amplifier applications, use a voltage divider network to set the base voltage, and choose a collector resistor that provides the desired collector current. Additionally, consider using a negative feedback network to improve linearity and stability.
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The maximum collector current the BD139 can handle is 1.5 A, but it's recommended to operate it at a maximum of 1 A to ensure reliability and prevent overheating.
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Yes, the BD139 can be used in a push-pull amplifier configuration, but it's essential to ensure that the transistors are properly matched and biased to prevent crossover distortion and ensure optimal performance.