Type Designator: J201

Download J201 datasheet from Fairchild Semiconductor: pdf 616 kb: N-Channel silicon junction field-effect transistor Others with the same file for datasheet: SMPJ201, SMPJ202: Download J201 datasheet from InterFET Corporation: pdf 97 kb: Low Noise, Single, N-Channel JFET Amplifier: Download J201 datasheet from Linear Systems: pdf 123 kb: Low. JFET J201 N-Channel Transistor. Used in MOD Kits.Note - this is a fragile component! Use caution not to overheat or break leads.

Type of Transistor: JFET

Type of Control Channel: N -Channel

J201 Datasheet, J201 PDF, J201 Data sheet, J201 manual, J201 pdf, J201, datenblatt, Electronics J201, alldatasheet, free, datasheet, Datasheets, data sheet, datas. JFET FET Transistor Assortment Kit J201, J202, J175, PF5102, J113, J211, PN4391, J107, PN4393 incl. Sockets: Amazon.com: Industrial & Scientific.

Maximum Power Dissipation (Pd): 0.625 W

Maximum Drain-Source Voltage Vds : 40 V

Maximum Gate-Source Voltage Vgs : 1.5 V

Maximum Drain Current Id : 0.001 A

Maximum Junction Temperature (Tj): 150 °C

Package: TO-92

J201 Transistor Equivalent Substitute - MOSFET Cross-Reference Search

J201 Datasheet (PDF)

0.1. 2sj201.pdf Size:268K _toshiba

2SJ201 TOSHIBA Field Effect Transistor Silicon P Channel MOS Type 2SJ201 High-Power Amplifier Application Unit: mm High breakdown voltage : VDSS = -200 V High forward transfer admittance : Yfs = 5.0 S (typ.) Complementary to 2SK1530 Absolute Maximum Ratings (Ta = 25C) Characteristics Symbol Rating UnitDrain-source voltage VDSS -200 VJEDEC Gate-source voltag


0.2. j201.pdf Size:851K _fairchild_semi

J201 MMBFJ201J202 MMBFJ202GSTO-92GS SOT-23 NOTE: Source & DrainDD are interchangeableMark: 62P / 62QN-Channel General Purpose AmplifierThis device is designed primarily for low level audio and generalpurpose applications with high impedance signal sources. Sourcedfrom Process 52.Absolute Maximum Ratings* TA = 25C unless otherwise notedSymbol Parameter Value Uni

0.3. j201 j202 mmbfj201 mmbfj202 mmbfj203.pdf Size:783K _fairchild_semi

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J201 Fet

January 2008J201 - J202 / MMBFJ201 - MMBFJ203N-Channel General Purpose Amplifier This device is designed primarily for low level audio and general purpose applications with high impedance signal sources. Sourced from Process 52.TO-92 SOT-2332MarkingMarking J201MMBFJ201 : 62PJ202MMBFJ202 : 62Q1 11. Drain 2. Source 3. Gate 1. Drain 2. Source 3. GateAbsolute

0.4. j201 j202 j204c sst201 sst202 sst204c.pdf Size:78K _vishay

J/SST201 Series Vishay SiliconixN-Channel JFETsJ201 SST201J202 SST202J204 SST204PRODUCT SUMMARYPart Number VGS(off) (V) V(BR)GSS Min (V) gfs Min (mS) IDSS Min (mA)J/SST201 -0.3 to -1.5 -40 0.5 0.2J/SST202 -0.8 to -4 -40 1 0.9J/SST204 -0.3 to -2 -25 0.5 0.2FEATURES BENEFITS APPLICATIONSD Low Cutoff Voltage: J201

0.5. j201 j202 j203 j204 sst201 sst202 sst203 sst204.pdf Size:22K _calogic

N-Channel JFETGeneral Purpose AmplifierCORPORATIONJ201 J204 / SST201 SST204FEATURES ABSOLUTE MAXIMUM RATINGS(TA = 25oC unless otherwise specified) High Input Impedance Low IGSS Gate-Source or Gate-Drain Voltage . . . . . . . . . . . . . . . . -40VGate Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mAStorage Temperature Range

0.6. cj201nl.pdf Size:151K _jiangsu

JIANGSU CHANGJIANG ELECTRONICS TECHNOLOGY CO., LTD SOT-23 Plastic-Encapsulate Transistors CJ201NL TRANSISTOR (NPN) SOT23 FEATURES High Collector Current Capability Low Collector-emitter Saturation Voltage High Efficiency Leading to Less Heat Generation 1. BASE Reduced PCB Requirements 2. EMITTER Alternatived Effectively to MOSFETS in Specific Applications

0.7. lj2015-52.pdf Size:105K _china

LJ2015-52FD75C NPN P T =25 75 WCM CI 10 ACMT 150 jmT -55~150 stgV I 2mA 50 V(BR)CBO CBV I 2mA 50 V(BR)CEO CEI V =20V 2 mACBO CBI V =20V 2 mACEO EBV 2.5 VBEsatI =5ACI =0.5AB

0.8. cs7456 lj2015-53.pdf Size:70K _china

LJ2015-53CS7456DP N P T =25 1.9 WD AI V =10V,T =25 5.7 AD GS AI 40 ADMV 20 VGST +150 jmT -55 +150 stgR 65thJA /WR 1.8thJCBV V =0V,I =0.25mA 100 VDSS GS DV =10V,I =9.3A 0.025

Datasheet: JFTJ105, J174, J175, J176, J177, MMBFJ175, MMBFJ176, MMBFJ177, IRF740, J202, MMBFJ201, MMBFJ202, J210, MMBFJ210, MMBFJ211, MMBFJ212, J270.


Last Update

MOSFET: CEZ3R04 CEZ3P08 CES2322 CEB93A3 CEF9060N CEB6086 CEN2321A CEN2307A CEM9288 CEM6056L CEM4052 CEM2192 CEU25N02 CED25N02 CEU20N02 CED20N02

A Guitar Preamp
with the MPF102 JFET

Now, with Easy to Find Parts! Some time ago, J. Donald Tillman designed an elegant JFET guitar preamplifier. He posted the circuit on the Web. Overnight, this circuit became very popular. And it's still a winner today. The reasons why are easy to see. This amp is easy to build. The circuit works like a champ. And the JFET's tube-like warmth sounds great. Plus, the high-impedance input won't load your guitar. And the medium output impedance combats high-frequency losses due to loading and long cables. And by the way, this FET preamp is great for microphones, too!

Bad News..and Good. Unfortunately, Tillman's amplifier requires a J201 FET. The J201 is a very special device and an excellent choice. Yet it's uncommon to hobbyists. But my site solves the mystery. I've designed a similar preamplifier with an everyday JFET.

Many Advantages of MPF102. I've read the forums. Hobbyists want to use the famous MPF102 in Tillman's original design. The MPF102 is an excellent choice. It handles more current than the J201, making the MPF102 more rugged. The MPF102 can provide a stronger signal into a lower impedance load. And like many other JFETs, the MPF102 is a low-noise device. The MPF102 has a lower gain than the J201: An advantage, because it won't overload as fast as the J201 does. Still, Tillman optimized his design for the J201. The specs for an MPF102 are very different. Ignore the differences, and your amplifier might not work. For example..

  • The J201 requires only 0.2mA to 1 mA of drain current.
  • The MPF102 operates on 2 to 20 mA. Run it on less, and you may get an attenuator instead of an amplifier! I can prove that statement. See.. Proof

Summary of the Differences

On the table, notice that the MPF102 requires more current than does the J201. The current requirement is a major reason why you can't just plug an MPF102 into Tillman's circuit. This is a very poor substitution. It will disappoint you. (You might as well strum piccolo music on a bass guitar. You'll have more luck.)

Device IDSS
(Drain current, mA)
VGS GFS (Gain) RDS Typical
J201 0.2 - 1 -40 0.5mS + 750Ω 10
MPF102 2 - 20 -25 2 - 6.5mS 150Ω 15

Achieve results that you can be proud of! When you build a circuit, you go to a lot of work. Make the effort pay off! My page offers a new preamp design, starting with the MPF102's specs. Now you have the right design for an MPF102 JFET preamplifier. Build carefully. You'll wind up with a satisfying project that you'll appreciate for years.

Oncoming Scarcity of MPF102 & J201

CAUTION. Major manufacturers are exiting the JFET market. Others are ceasing production of leaded JFETs or MOSFETs. For instance, Siliconix has already left the JFET market.

In 2011, Fairchild obsoleted the MPF102 and J201. Other JFETs that are compatible with the MPF102 (2N3819, 2N5458, etc.) are also obsolete! When current stocks run out, Fairchild will not provide more. For the time being, you can still buy these devices from vendors or factory representatives (see below.)

In February 2013, Radio Shack discontinued the MPF102 (part 276-2062). Soon thereafter, stores ran out their stocks forever. Other vendors sell various substitutes, many by NTE. You'll have to order online. I recommend the NTE457. For more suggestions, click MPF102 Substitutes.

Substitute Parts

Fairchild continues to manufacture the J113, a possible substitute for the MPF102. Vendors such as Mouser and Digi-Key sell the J113.

Other sources continue to make the MPF102 and J201..

  • InterFET, the former producer of the Siliconix JFET line, continues to manufacture the J201. InterFET also provides devices that seem compatible with the MPF102: Use the Interfet 2N3822 or J113. Note that device pinouts might not match the MPF102 pinout. For an InterFET sales representative in your area, contact InterFET.

J201 Jfet Pinout

  • Central Semiconductor continues to manufacture the 2N3819. The 2N3819 is a reliable substitute for the MPF102. (The pinout differs.) Central also offers the J201, which you'll need for the Tillman circuit. Prices for these “end-of-life” devices tend to be high.
  • Ebay Electronics Parts can find you deals on JFETs from China. Some of these deals are impressive. If you can arrange for air shipment, your order can arrive in a few days or weeks. I don't know if the parts come from Chinese foundries or elsewhere. Chinese MPF102s plug right into my circuit. I've bought 2N5457, J113, and 2SK370 JFETs from China. So far, the I've received excellent parts.

Catalog and Online Vendors..

MouserNewarkRadio Shack

J201 Jfet Schematic

Find a Vendor in Your Area..

•Contact Central, Fairchild, or InterFET for a local representative!

Go to Page: 12345678FAQNext

J201 Jfet Datasheet

WARNING. This is your project. Your achievement is entirely yours. I assume no responsibility for your success in using methods on these pages. If you fail, the same is true. I neither make nor imply any warranty. I don't guarantee the accuracy or effectiveness of these methods. Parts, skill and assembly methods vary. So will your results. Proceed at your own risk.

WARNING. Electronic projects can pose hazards. Soldering irons can burn you. Chassis paint and solder are poisons. Even with battery projects, wiring mistakes can start fires. If the schematic and description on this page baffle you, this project is too advanced. Try something else. Again, damages, injuries and errors are your responsibility. — The Webmaster

Copyright © 2007 by James T. Hawes. All rights reserved.

•URL: http://www.hawestv.com/amp_projects/fet_preamp/fetpreamp1.htm
•Webmaster: James T. Hawes
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