Part Details for BFY51 by STMicroelectronics
Results Overview of BFY51 by STMicroelectronics
- Distributor Offerings: (0 listings)
- Number of FFF Equivalents: (10 replacements)
- CAD Models: (Request Part)
- Number of Functional Equivalents: (10 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.
BFY51 Information
BFY51 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.
Part Details for BFY51
BFY51 CAD Models
BFY51 Part Data Attributes
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BFY51
STMicroelectronics
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Datasheet
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BFY51
STMicroelectronics
1000mA, 30V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-39
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| Rohs Code | No | |
| Part Life Cycle Code | Obsolete | |
| Ihs Manufacturer | STMICROELECTRONICS | |
| Reach Compliance Code | not_compliant | |
| ECCN Code | EAR99 | |
| HTS Code | 8541.29.00.75 | |
| Samacsys Manufacturer | STMicroelectronics | |
| Collector Current-Max (IC) | 1 A | |
| Collector-Emitter Voltage-Max | 30 V | |
| Configuration | SINGLE | |
| DC Current Gain-Min (hFE) | 40 | |
| 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 | 200 °C | |
| Package Body Material | METAL | |
| Package Shape | ROUND | |
| Package Style | CYLINDRICAL | |
| Polarity/Channel Type | NPN | |
| Power Dissipation Ambient-Max | 5 W | |
| Power Dissipation-Max (Abs) | 0.8 W | |
| Qualification Status | Not Qualified | |
| Surface Mount | NO | |
| Terminal Finish | TIN LEAD | |
| Terminal Form | WIRE | |
| Terminal Position | BOTTOM | |
| Transistor Application | SWITCHING | |
| Transistor Element Material | SILICON | |
| Transition Frequency-Nom (fT) | 50 MHz | |
| VCEsat-Max | 1.6 V |
Alternate Parts for BFY51
This table gives cross-reference parts and alternative options found for BFY51. 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 BFY51, 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 |
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| BFY51 | Continental Device India Ltd | $0.2916 | Small Signal Bipolar Transistor, 1A I(C), 30V V(BR)CEO, 1-Element, NPN, Silicon, TO-39 | BFY51 vs BFY51 |
| BFY51LEADFREE | Central Semiconductor Corp | Check for Price | Small Signal Bipolar Transistor, 30V V(BR)CEO, 1-Element, NPN, Silicon, TO-39, TO-39, 3 PIN | BFY51 vs BFY51LEADFREE |
| BFY51 | Crimson Semiconductor Inc | Check for Price | Small Signal Bipolar Transistor, 1A I(C), 30V V(BR)CEO, 1-Element, NPN, Silicon, TO-39, | BFY51 vs BFY51 |
| BFY51 | Diodes Incorporated | Check for Price | 1000mA, 30V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-39 | BFY51 vs BFY51 |
| BFY51-QR-B | TT Electronics Power and Hybrid / Semelab Limited | Check for Price | 1000mA, 30V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-205AD, HERMETIC SEALED, METAL, TO-39, 3 PIN | BFY51 vs BFY51-QR-B |
| BFY51 | NXP Semiconductors | Check for Price | TRANSISTOR 1000 mA, 30 V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-39, BIP General Purpose Small Signal | BFY51 vs BFY51 |
| BFY51 | TT Electronics Power and Hybrid / Semelab Limited | Check for Price | 1000mA, 30V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-205AD, HERMETIC SEALED, METAL, TO-39, 3 PIN | BFY51 vs BFY51 |
| BFY51 | TT Electronics Resistors | Check for Price | Small Signal Bipolar Transistor, 1A I(C), 30V V(BR)CEO, 1-Element, NPN, Silicon, TO-205AD, HERMETIC SEALED, METAL, TO-39, 3 PIN | BFY51 vs BFY51 |
| BFY51 | Micro Electronics Corporation | Check for Price | Small Signal Bipolar Transistor, 1A I(C), 30V V(BR)CEO, 1-Element, NPN, Silicon, TO-39, TO-39, 3 PIN | BFY51 vs BFY51 |
| BFY51 | Central Semiconductor Corp | Check for Price | Small Signal Bipolar Transistor, 1A I(C), 30V V(BR)CEO, 1-Element, NPN, Silicon, TO-39, TO-39, 3 PIN | BFY51 vs BFY51 |
BFY51 Frequently Asked Questions (FAQ)
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The maximum safe operating area (SOA) for the BFY51 is not explicitly stated in the datasheet. However, it's recommended to follow the general guidelines for SOA calculation provided in the application notes and to consult with STMicroelectronics' support team for specific guidance.
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To ensure proper biasing, follow the recommended operating conditions and biasing schemes outlined in the datasheet and application notes. Additionally, consider using a voltage regulator or a biasing network to maintain a stable voltage supply and minimize thermal effects.
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For optimal thermal management, use a PCB layout that allows for good heat dissipation, such as using a thermal pad or a heat sink. Ensure that the transistor is mounted on a copper plane or a thermal via to dissipate heat efficiently. Consult the datasheet and application notes for specific layout recommendations.
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Yes, the BFY51 can be used in switching applications, but it's essential to consider the transistor's switching characteristics, such as the transition frequency, rise and fall times, and the maximum switching frequency. Consult the datasheet and application notes for specific guidance on switching applications.
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To protect the BFY51 from ESD, follow proper handling and storage procedures, such as using anti-static bags, wrist straps, and mats. Ensure that the PCB design includes ESD protection components, such as TVS diodes or resistors, and consider using a ESD-protected transistor package.