Part Details for 2N4857 by Microchip Technology Inc
Results Overview of 2N4857 by Microchip Technology Inc
- Distributor Offerings: (9 listings)
- Number of FFF Equivalents: (0 replacements)
- CAD Models: (Request Part)
- Number of Functional Equivalents: (0 options)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
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Applications
Consumer Electronics
Audio and Video Systems
2N4857 Information
2N4857 by Microchip Technology Inc is a Power Field-Effect Transistor.
Power Field-Effect 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 2N4857
| Part # | Distributor | Description | Stock | Price | Buy | |
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DISTI #
34AJ1140
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Newark | 40V 360Mw 50Ma Jfet Tht To-18 Rohs Compliant: Yes |Microchip 2N4857 RoHS: Compliant Min Qty: 100 Package Multiple: 1 Date Code: 0 Container: Bulk | 0 |
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$54.4300 / $56.6000 | Buy Now |
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DISTI #
2N4857-ND
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DigiKey | JFET N-CH 40V TO18 Min Qty: 100 Lead time: 52 Weeks Container: Bulk | Temporarily Out of Stock |
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$56.6003 | Buy Now |
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DISTI #
2N4857
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Avnet Americas | Transistor JFET N-Channel 40V 100mA 3-Pin TO-18 Bag - Bulk (Alt: 2N4857) RoHS: Not Compliant Min Qty: 100 Package Multiple: 1 Lead time: 111 Weeks, 0 Days Container: Bulk | 0 |
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$50.9760 / $54.4250 | Buy Now |
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DISTI #
494-2N4857
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Mouser Electronics | JFETs 40V 360mW 50mA JFET THT RoHS: Not Compliant | 0 |
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$56.6000 / $60.9600 | Order Now |
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DISTI #
2N4857
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Microchip Technology Inc | JFET _ TO-18, Projected EOL: 2049-02-05 COO: United States of America ECCN: EAR99 |
0 Alternates Available |
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$60.9600 | Buy Now |
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Onlinecomponents.com | RoHS: Compliant | 0 |
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$54.0500 / $148.0400 | Buy Now |
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NAC | JFETs RoHS: Compliant Min Qty: 5 Package Multiple: 1 | 0 |
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$53.1000 / $62.2000 | Buy Now |
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DISTI #
2N4857
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Avnet Silica | Transistor JFET NChannel 40V 100mA 3Pin TO18 Bag (Alt: 2N4857) RoHS: Not Compliant Min Qty: 100 Package Multiple: 1 Lead time: 38 Weeks, 0 Days | Silica - 0 |
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Buy Now | |
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Master Electronics | RoHS: Compliant | 0 |
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$54.0500 / $148.0400 | Buy Now |
Part Details for 2N4857
2N4857 CAD Models
2N4857 Part Data Attributes
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2N4857
Microchip Technology Inc
Buy Now
Datasheet
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Compare Parts:
2N4857
Microchip Technology Inc
Small Signal Field-Effect Transistor, 40V, 1-Element, N-Channel, Silicon, Junction FET, TO-206AA
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| Rohs Code | No | |
| Part Life Cycle Code | Active | |
| Ihs Manufacturer | MICROCHIP TECHNOLOGY INC | |
| Reach Compliance Code | compliant | |
| ECCN Code | EAR99 | |
| Factory Lead Time | 111 Weeks | |
| JESD-609 Code | e0 | |
| Qualification Status | Not Qualified | |
| Terminal Finish | TIN LEAD |
2N4857 Frequently Asked Questions (FAQ)
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The 2N4857 can operate from -40°C to +125°C, but the maximum junction temperature (TJ) should not exceed 150°C.
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To ensure reliable operation in high-noise environments, use proper PCB layout techniques, such as separating analog and digital grounds, using decoupling capacitors, and shielding the device from electromagnetic interference (EMI).
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The recommended input impedance for the 2N4857 is 1 kΩ to 10 kΩ to ensure proper signal transmission and minimize signal reflections.
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No, the 2N4857 is not designed to be used as a voltage regulator. It is a high-speed, low-power, 5 V, RS-485/RS-422 transceiver, and should only be used for its intended purpose.
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To troubleshoot issues with the 2N4857, check the power supply voltage, ensure proper termination of the transmission line, verify the signal integrity, and use a logic analyzer or oscilloscope to debug the signal transmission.