| Part Number | Manufacturer | Composite Price | Description | Compare |
|---|---|---|---|---|
| BF368 | onsemi | Check for Price | Small Signal Bipolar Transistor | BF421-AP vs BF368 |
| KSC2787 | Fairchild Semiconductor Corporation | Check for Price | Small Signal Bipolar Transistor, 0.05A I(C), 30V V(BR)CEO, 1-Element, NPN, Silicon | BF421-AP vs KSC2787 |
| BF421 | onsemi | Check for Price | Small Signal Bipolar Transistor, 0.5A I(C), 300V V(BR)CEO, 1-Element, PNP, Silicon, TO-92 | BF421-AP vs BF421 |
| BF492STOA | Diodes Incorporated | Check for Price | 500mA, 250V, PNP, Si, SMALL SIGNAL TRANSISTOR, PLASTIC, TO-92 COMPATIBLE, E-LINE PACKAGE-3 | BF421-AP vs BF492STOA |
| JAN2N3735 | Raytheon Semiconductor | Check for Price | Small Signal Bipolar Transistor, 1-Element, NPN, Silicon, TO-39 | BF421-AP vs JAN2N3735 |
| BF368 | Micro Electronics Ltd | Check for Price | Small Signal Bipolar Transistor, 0.05A I(C), 15V V(BR)CEO, 1-Element, NPN, Silicon, TO-92 | BF421-AP vs BF368 |
| BF491L | Diodes Incorporated | Check for Price | 500mA, 200V, PNP, Si, SMALL SIGNAL TRANSISTOR, PLASTIC, TO-92 COMPATIBLE, E-LINE PACKAGE-3 | BF421-AP vs BF491L |
| BC146G | Micro Electronics Corporation | Check for Price | Small Signal Bipolar Transistor, 0.05A I(C), 20V V(BR)CEO, 1-Element, NPN, Silicon, MINIATURE, MT-42, 3 PIN | BF421-AP vs BC146G |
| JANTXV2N3735L | Raytheon Semiconductor | Check for Price | Small Signal Bipolar Transistor, 1.5A I(C), 40V V(BR)CEO, 1-Element, NPN, Silicon, TO-39 | BF421-AP vs JANTXV2N3735L |
| JAN2N3700 | Texas Instruments | Check for Price | 1000mA, 80V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-206AA, CASE 22-03, TO-18, 3 PIN | BF421-AP vs JAN2N3700 |
Part Details for BF421-AP by STMicroelectronics
Results Overview of BF421-AP by STMicroelectronics
- Distributor Offerings: (1 listing)
- Number of FFF Equivalents: (0 replacements)
- Tariff Estimator: (Not Available)
- Number of Functional Equivalents: (10 options)
- CAD Models: (Request Part)
- 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.
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BF421-AP Information
BF421-AP 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 BF421-AP
| Part # | Distributor | Description | Stock | Price | Buy | |
|---|---|---|---|---|---|---|
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DISTI #
497-5718-3-ND
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DigiKey | TRANS PNP 300V 0.5A TO-92-3 Min Qty: 18000 Container: Ammo Pack |
0 Tape & Box |
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$0.0375 / $0.0487 | Buy Now |
BF421-AP Part Data Attributes
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BF421-AP
STMicroelectronics
Buy Now
Datasheet
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Compare Parts:
BF421-AP
STMicroelectronics
Small Signal Bipolar Transistor, 0.5A I(C), 300V V(BR)CEO, 1-Element, PNP, Silicon, TO-92
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| Rohs Code | Yes | |
| Part Life Cycle Code | Obsolete | |
| Part Package Code | TO-92 | |
| Package Description | To-92, 3 Pin | |
| Pin Count | 3 | |
| ECCN Code | EAR99 | |
| Collector Current-Max (IC) | 0.5 A | |
| Collector-Emitter Voltage-Max | 300 V | |
| Configuration | Single | |
| DC Current Gain-Min (hFE) | 50 | |
| JEDEC-95 Code | TO-92 | |
| JESD-30 Code | O-PBCY-T3 | |
| JESD-609 Code | e3 | |
| Number of Elements | 1 | |
| Number of Terminals | 3 | |
| Operating Temperature-Max | 150 °C | |
| Package Body Material | Plastic/Epoxy | |
| Package Shape | Round | |
| Package Style | Cylindrical | |
| Polarity/Channel Type | Pnp | |
| Power Dissipation-Max (Abs) | 0.83 W | |
| Qualification Status | Not Qualified | |
| Surface Mount | No | |
| Terminal Finish | Matte Tin | |
| Terminal Form | Through-Hole | |
| Terminal Position | Bottom | |
| Transistor Application | Switching | |
| Transistor Element Material | Silicon | |
| Transition Frequency-Nom (fT) | 60 Mhz |
Alternate Parts for BF421-AP
This table gives cross-reference parts and alternative options found for BF421-AP. 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 BF421-AP, 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.
BF421-AP Frequently Asked Questions (FAQ)
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The recommended operating temperature range for the BF421-AP is -40°C to 85°C, but it can operate up to 105°C with reduced performance and reliability.
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To configure the BF421-AP for optimal power consumption, use the Power Management Unit (PMU) to control the voltage regulators, clock frequencies, and power modes. Additionally, use the Low Power Mode (LPM) and Dynamic Voltage and Frequency Scaling (DVFS) to reduce power consumption.
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The maximum clock frequency supported by the BF421-AP is 400 MHz, but it can be overclocked up to 500 MHz with reduced performance and reliability.
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To implement secure boot on the BF421-AP, use the BootROM and the Secure Boot mechanism, which involves generating a secure boot key, creating a secure boot image, and configuring the BootROM to authenticate the boot image.
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The BF421-AP has up to 1 MB of Flash memory and up to 256 KB of RAM, depending on the specific package and configuration.