ProjectsPricingInsights

Best Alternatives to CJE3139K

Package: SOT-523Jiangsu Changjing Electronics Technology Co., Ltd.MOSFETs - SingleFET Type: P-ChannelDrain-Source Voltage (VDS): -20 VContinuous Drain Current (ID): -0.66 ARDS(on) (Max) @ VGS, ID: 520 mΩ @ -4.5V, -1AGate Threshold Voltage (VGS(th)): -0.35V to -1.1V

CJE3139K is a -20 V P-channel SOT-523 MOSFET. Alternatives need pinout and derating checks.

AI replacement insight

Electrical riskmedium

Best candidates have weaker Id and Rds.

Package riskmedium

SOT-523 matches, pinout is unverified.

Firmware risklow

Discrete MOSFET; no firmware.

Sourcing riskmedium

Some recalls are obsolete or wrong polarity.

Can it be replaced directly?

No verified pin-compatible replacement is proven from the provided data.

Best replacement path

Review SI3139KE-TP-ES or ES3139KW first for derated loads.

Main risk

Lower current rating and higher Rds(on) can raise heat.

Recommended alternatives

2
SI3139KE-TP-ES package
SI3139KE-TP-ES

ElecSuper

Needs validationmedium risk

SI3139KE-TP-ES is a P-channel SOT-523 candidate with lower current and higher Rds(on).

View details

Alternative comparison matrix

Feature / factorCJE3139KSI3139KE-TP-ESES3139KWDMP2004TKCompatibility / risk
PackageSOT-523SOT-523SOT-523SOT-523SOT-523 — same case; ES3139KW: same case; DMP2004TK: same case
Pinout3-pin3-pin3-pinmissing3-pin / missing — pin map absent; ES3139KW: pin map absent; DMP2004TK: pin count 0
Voltage-20 V-20 V-20 V20 V-20 V — same Vdss; ES3139KW: same Vdss; DMP2004TK: P-channel sign implied
Current-0.66 A-0.5 A-0.5 A430 mA-0.5 A / 430 mA — lower Id; ES3139KW: lower Id; DMP2004TK: lower Id
Resistance520 mΩ850 mΩ850 mΩmissing850 mΩ / missing — higher loss; ES3139KW: higher loss; DMP2004TK: key loss field

Application & sourcing insights

Questions & answers

SI3139KE-TP-ES or ES3139KW are the closest shown, but both need derating and pinout review.