Part Details for BC394 by STMicroelectronics
Results Overview of BC394 by STMicroelectronics
- Distributor Offerings: (1 listing)
- Number of FFF Equivalents: (5 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.
BC394 Information
BC394 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 BC394
| Part # | Distributor | Description | Stock | Price | Buy | |
|---|---|---|---|---|---|---|
|
|
ComSIT USA | Electronic Component RoHS: Not Compliant |
|
|
RFQ |
Part Details for BC394
BC394 CAD Models
BC394 Part Data Attributes
|
|
BC394
STMicroelectronics
Buy Now
Datasheet
|
Compare Parts:
BC394
STMicroelectronics
100mA, 180V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-18, METAL PACKAGE-3
Select a part to compare: |
| Rohs Code | No | |
| Part Life Cycle Code | Obsolete | |
| Ihs Manufacturer | STMICROELECTRONICS | |
| Part Package Code | BCY | |
| Package Description | METAL PACKAGE-3 | |
| Pin Count | 3 | |
| Reach Compliance Code | compliant | |
| ECCN Code | EAR99 | |
| Collector Current-Max (IC) | 0.1 A | |
| Collector-Emitter Voltage-Max | 180 V | |
| Configuration | SINGLE | |
| DC Current Gain-Min (hFE) | 30 | |
| JEDEC-95 Code | TO-18 | |
| 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) | 0.4 W | |
| Qualification Status | Not Qualified | |
| Surface Mount | NO | |
| Terminal Finish | TIN LEAD | |
| Terminal Form | WIRE | |
| Terminal Position | BOTTOM | |
| Transistor Application | AMPLIFIER | |
| Transistor Element Material | SILICON | |
| Transition Frequency-Nom (fT) | 50 MHz |
Alternate Parts for BC394
This table gives cross-reference parts and alternative options found for BC394. 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 BC394, 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 |
|---|---|---|---|---|
| BC394 | Motorola Mobility LLC | Check for Price | 500mA, 180V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-18 | BC394 vs BC394 |
| BC394 | Central Semiconductor Corp | Check for Price | Small Signal Bipolar Transistor, 0.5A I(C), 180V V(BR)CEO, 1-Element, NPN, Silicon, TO-18, | BC394 vs BC394 |
| BC394G4 | TT Electronics Power and Hybrid / Semelab Limited | Check for Price | 100mA, 160V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-206AA, HERMETIC SEALED, METAL, TO-18, 3 PIN | BC394 vs BC394G4 |
| BC394 | TT Electronics Resistors | Check for Price | Small Signal Bipolar Transistor, 0.1A I(C), 160V V(BR)CEO, 1-Element, NPN, Silicon, TO-206AA, HERMETIC SEALED, METAL, TO-18, 3 PIN | BC394 vs BC394 |
| BC394 | Micro Electronics Ltd | Check for Price | Small Signal Bipolar Transistor, 0.1A I(C), 180V V(BR)CEO, 1-Element, NPN, Silicon, TO-18, TO-18, 3 PIN | BC394 vs BC394 |
BC394 Frequently Asked Questions (FAQ)
-
The maximum safe operating area (SOA) for the BC394 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 rule, it's recommended to operate the transistor within the specified voltage and current ratings to ensure safe operation.
-
The choice of base resistor value for the BC394 depends on the specific application and the desired current gain. A general rule of thumb is to choose a base resistor value that limits the base current to 1/10th of the collector current. For example, if the collector current is 100mA, the base resistor value should be chosen to limit the base current to 10mA.
-
Yes, the BC394 can be used as a switch, but it's essential to consider the transistor's switching characteristics, such as the turn-on and turn-off times, and the collector-emitter saturation voltage. The BC394 has a relatively slow switching speed compared to modern switching transistors, so it may not be suitable for high-frequency switching applications.
-
To protect the BC394 from electrostatic discharge (ESD), it's recommended to handle the device with anti-static precautions, such as using an anti-static wrist strap or mat. Additionally, the device should be stored in an anti-static package, and the PCB should be designed with ESD protection in mind, such as using ESD protection diodes or resistors.
-
The BC394 is a relatively old transistor, and there may not be a direct equivalent replacement. However, some possible alternatives include the 2N3904 or the BC547, which have similar characteristics and can be used as a replacement in many applications. However, it's essential to verify the specifications and performance of the replacement device to ensure it meets the requirements of the application.