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Trans JFET N-CH 40V 3-Pin TO-18 Bag

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Key Features

  • Low on resistance
  • High off resistance
  • High speed switch


Category Discrete Semiconductor ProductsTransistorsJFETs Mfr Microchip Technology
Series - Package Bulk
Product Status Active FET Type N-Channel
Voltage - Breakdown (V(BR)GSS) 40 V Drain to Source Voltage (Vdss) 40 V
Current - Drain (Idss) @ Vds (Vgs=0) 100 mA @ 15 V Voltage - Cutoff (VGS off) @ Id 6 V @ 500 pA
Input Capacitance (Ciss) (Max) @ Vds 18pF @ 10V Resistance - RDS(On) 40 Ohms
Power - Max 360 mW Operating Temperature -65°C ~ 200°C (TJ)
Mounting Type Through Hole Package / Case TO-206AA, TO-18-3 Metal Can
Supplier Device Package TO-18 Base Product Number 2N4857
Manufacturer InterFET Product Category JFET
RoHS Details Technology Si
Mounting Style Through Hole Transistor Polarity N-Channel
Configuration Single Vds - Drain-Source Breakdown Voltage 15 V
Vgs - Gate-Source Breakdown Voltage - 40 V Gate-Source Cutoff Voltage - 6 V
Drain-Source Current at Vgs=0 100 mA Id - Continuous Drain Current 500 pA
Rds On - Drain-Source Resistance 40 Ohms Pd - Power Dissipation 1.8 W
Brand InterFET Product Type JFETs
Factory Pack Quantity 1 Subcategory Transistors


Shipping Method

Our products are mainly transported and delivered by DHL, FedEx, UPS and other logistics partners on site -- Available to 200+ countries.

Delivery Time

The delivery time is usually within 2-7 days, depending on the logistics provider and the area of delivery.

The following are the estimated delivery times of some logistics service providers.

  • DHL

  • Fedex

  • UPS

  • EMS

  • Registered Air Mail


We accept TT prepayment (bank transfer), paypal, credit cards, Western Union, Money Gram.

Checks and other instruments are not supported to pay for orders and customers are required to pay all possible fees, including sales tax,
customs fees, etc.

  • Wire Transfer

  • Paypal

  • Credit Card

  • Western Union

  • Money Gram


Our policies and procedures are designed to ensure compliance with various quality specifications and to quickly resolve quality-related issues.

We promise to provide 365 days quality assurance service for all our products.

If you have any dissatisfaction with the quality of the product you received, you can contact us for a refund or exchange, as long as the product is kept in its original condition.


AVAQ determines and packages all devices based on electrostatic discharge (ESD) and moisture sensitivity level (MSL) protection requirements.
  • ESD


  • Tape and Reel

    Tape and Reel

  • Cut Tape

    Cut Tape

  • Tube or Tray

    Tube or Tray

Ratings and Reviews

I**h Jun 29, 2020

I ordered 4 panels, and sent 3. the opinion about the store is spoiled.

R**r May 05, 2020

Mike offered top notch service, pricing, and parts. Thanks for the hard work!

S**a Feb 28, 2020

Excellent modules, ordered for, 3.3, 5 and 12 volts all came working in the urals in 23 days. I'm happy

D**n Jul 04, 2018

Everything is great, but the fact that the order was sent "without tracking", it turned out only later, after placing the order. Received only today, ordered on june 17, very long drove!



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Buying Guide

  • What is the lifespan of 2N4857?

    The lifespan of 2N4857 depends on various factors such as the quality of materials used, operating conditions, and the manufacturer's recommended usage time. The datasheet provided by the manufacturer specifies the expected lifespan of the product.

  • Where can I find the full specification of 2N4857?

    You can find it with PDF Datasheet for 2N4857 on this page. If it is not available, you can contact Avaq at [email protected] to inquire about the Datasheet for this part.

  • How to check the quality of 2N4857?

    Avaq has separate quality services with common quality inspection equipment for testing items, you can also fill out a sample form, our team will get in touch with you within 24 HOURS.

  • Can I purchase samples for testing?

    Avaq offers free samples for customers to test. This can often help you determine whether the chip or component meets your needs.

  • Where can I check the delivery after the order is completed?

    Once the order is completed, you will receive an order confirmation email containing a tracking number from AVAQ, then you can track the delivery by yourself.

  • Where to view my order of 2N4857 or my history order record?

    You could view all of your orders by logging in or registering AVAQ account. Log in or Register an account now.