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2N4391 2N4391 is a N-Channel JFET transistor from Microchip Technology. It features a 40V drain-source voltage, 50mA drain current, and is housed in a through-hole TO-18 package.
Mfr Part #:

2N4391

Available from 1 distributors
Mfr Name: Microchip Technology
Microchip Technology
2N4391 is a N-Channel JFET transistor from Microchip Technology. It features a 40V drain-source voltage, 50mA drain current, and is housed in a through-hole TO-18 package.
✓ Total Stock: 130,000 pcs
$ Price Range: $19.65

2N4391 Available from 1 distributor

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Components Technology Group, Inc. ✓
Non-Authorised Inventory information
130,000 pcs
On Request
130000 pcs On Request 1 On Request On Request On Request On Request On Request
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2N4391 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
FET Type
Input Capacitance (Ciss) (Max) @ Vds
Mounting Type
Operating Temperature
Power
Resistance
Supplier Device Package
Voltage
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2N4391 Description

Short technical summary and product information.

The 2N4391 is a N-Channel Junction Field-Effect Transistor (JFET) manufactured by Microchip Technology. Designed for general-purpose switching and amplification, it offers a maximum drain-source voltage of 40V and a drain current of 50mA at Vds=20V. The typical on-state resistance is 30Ω, and the input capacitance is 14pF at 20V. The device is packaged in a through-hole TO-18 package, suitable for breadboard and prototyping. The operating junction temperature range is -55°C to 125°C, allowing use in harsh environments. Power dissipation is limited to 1.8W. This JFET is suitable for low-power analog signal processing and switching applications.

2N4391 Quick Information

Product Type: JFET
Canonical Name: 2N4391 JFET N-Channel 40V Transistor
Subcategory: N-Channel JFETs

2N4391 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

2N4391 Estimated Pricing

Qty Low High
1+ $19.65 $19.65

Estimated market price range - modelled values for guidance only, not live distributor offers.

2N4391 Features

  • N-Channel JFET for switching and amplification.
  • 40V maximum drain-source voltage rating.
  • 50mA drain current at 20V Vds.
  • Through-hole TO-18 package.
  • Operating temperature range -55°C to 125°C.

2N4391 Applications

  • Used in low-noise analog switching circuits.
  • Suitable for small-signal amplification stages.
  • Ideal for through-hole prototyping and breadboarding.
  • Can be used in temperature sensing applications.

2N4391 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the maximum drain-source voltage of the 2N4391?

40V.

What is the package type of the 2N4391?

TO-18 through-hole package.

What is the operating temperature range of the 2N4391?

-55°C to 125°C (junction temperature).

Is the 2N4391 RoHS compliant?

The part is listed as RoHS3 compliant, but this status is unverified.

What is the drain current rating of the 2N4391?

50mA at Vds=20V.

What is the typical on-state resistance of the 2N4391?

30Ω.

What is the input capacitance of the 2N4391?

14pF at Vds=20V.

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