ProjectsPricingInsights

Best Alternatives to CJ2302 S2

Package: SOT-23Jiangsu Changjing Electronics Technology Co., Ltd.MOSFETs - SingleDrain-Source Voltage (VDS): 20 VContinuous Drain Current (ID): 2.1 AGate-Source Voltage (VGS): ±8 VRDS(on) @ VGS=4.5V: 0.045 ΩRDS(on) @ VGS=2.5V: 0.070 Ω

CJ2302 S2 is a 20V SOT-23 N-MOSFET. Several catalog candidates are plausible, but none are verified pin-compatible here.

AI replacement insight

Electrical riskmedium

Voltage, RDS, SOA vary.

Package risklow

Kept parts are SOT-23.

Firmware risklow

Discrete MOSFET.

Sourcing riskmedium

Lifecycle data is mixed.

Can it be replaced directly?

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

Best replacement path

Start with SI2300 or IRLML2502, then verify pinout, VGS rating, and SOA.

Main risk

Unverified pinout and MOSFET stress margins.

Recommended alternatives

4
SI2300 package
SI2300

GOODWORK

Needs validationmedium risk

SI2300 is a close SOT-23 N-MOSFET candidate, but voltage margin and pinout need review.

View details

Alternative comparison matrix

Feature / factorCJ2302 S2SI2300IRLML2502FS2310Compatibility / risk
PackageSOT-23SOT-23SOT-23SOT-23SOT-23 — same package; IRLML2502: same package; FS2310: same package; AO3422: same package
Pinout3-pin MOSFET3 pins3 pins3 pins3 pins — pin functions not shown; IRLML2502: pin functions not shown; FS2310: pin functions not shown; AO3422: pin functions not shown
Voltage20 V20 V20 V60 V20 V / 60 V — no 1.1x margin; IRLML2502: no 1.1x margin; FS2310: more margin; AO3422: more margin
Current2.1 A6 A4 A3 A6 A / 4 A / 3 A — higher ID; IRLML2502: higher ID; FS2310: higher ID; AO3422: higher ID
Resistance45/70 mΩ48/55 mΩ30 mΩ100/120 mΩ48/55 mΩ / 30 mΩ / 100/120 mΩ / 105/125 mΩ — similar RDS; IRLML2502: lower RDS; FS2310: higher loss; AO3422: higher loss

Application & sourcing insights

Questions & answers

SI2300 or IRLML2502 look closest electrically, but both need pinout and stress verification.