Disclaimer: It is the Buyers responsibility for designing, validating and testing the end application under all field use cases and

extreme use conditions. Guaranteeing the application meets required standards, regulatory compliance, and all safety and

security requirements is the responsibility of the Buyer. These resources are subject to change without notice.

IF35015.R00

IFN40

InterFET

Product

Folder

Technical

Support

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IFN40 N-Channel JFET

Features

• InterFET N0016H Geometry

• Low Noise: 5 nV/√Hz Typical

• Japanese 2SK40 Replacement

• RoHS Compliant

• SMT, TH, and Bare Die Package options.

Applications

• Audio Amplifiers

• Small Signal Amplifier

• High Impedance Pre-Amplifier

Description

The -50V InterFET IFN40 is a replacement for the

Japanese 2SK40. Targeted for sensitive amplifier

stages with gate leakages typically less than 10pA

at room temperatures.

Ordering Information Custom Part and Binning Options Available

Part Number

Description

Case

Packaging

IFN40

Through-Hole

TO-92

Bulk

SMP40

Surface Mount

SOT23

Bulk

SMP40TR

7“ Tape and Reel: Max 3,000 Pieces

13” Tape and Reel: Max 9,000 Pieces

SOT23

Minimum 1,000 Pieces

Tape and Reel

IFN40COT

Chip Orientated Tray (COT Waffle Pack)

COT

400/Waffle Pack

IFN40CFT

Chip Face-up Tray (CFT Waffle Pack)

CFT

400/Waffle Pack

1

2

3

Source

Drain

Gate

SOT23 Top View

TO-92 Bottom View

Product Summary

Parameters

IFN40 Min

Unit

BVGSS

Gate to Source Breakdown Voltage

-50

V

IDSS

Drain to Source Saturation Current

0.6

mA

VGS(off)

Gate to Source Cutoff Voltage

-0.4

V

GFS

Forward Transconductance

2.0 (Typ)

mS

Source

Drain

Gate

1

2

3