ProjectsPricingInsights

Best Alternatives to SI2305

Package: SOT-23ALJMOSFETs - SingleFET Type: P-ChannelDrain-Source Voltage (VDS): -20 VContinuous Drain Current (ID): -3.5 ARDS(on) (Max) @ VGS, ID: 52 mΩ @ -4.5V, -3.5AGate Threshold Voltage (VGS(th)): -0.45V to -0.8V

SI2305 is a P-channel -20V SOT-23 MOSFET. Several close candidates exist, but none are verified pin-compatible from the provided evidence.

AI replacement insight

Electrical riskmedium

VDS margin and SOA need check.

Package riskmedium

SOT-23 matches, pinout unknown.

Firmware risklow

Discrete MOSFET only.

Sourcing riskmedium

Avoid obsolete AO3415 for new builds.

Can it be replaced directly?

No verified pin-compatible replacement is proven here.

Best replacement path

Review DMP2120U or DMG2305UX first, then confirm pinout and SOA.

Main risk

Pinout is missing and -20V candidates give no extra voltage margin.

Recommended alternatives

4
DMP2120U package
DMP2120U

Diodes Incorporated

Needs validationmedium risk

DMP2120U is a close P-channel SOT-23 option for SI2305, pending pinout review.

View details

Alternative comparison matrix

Feature / factorSI2305DMP2120UDMG2305UXDMP2065UQ-7Compatibility / risk
PackageSOT-23SOT-23SOT-23SOT-23SOT-23 — same package; DMG2305UX: same package; DMP2065UQ-7: same package; AO3415: same package
Pinout3-pin3-pin3-pin3-pin3-pin — pin functions missing; DMG2305UX: pin functions missing; DMP2065UQ-7: pin functions missing; AO3415: pin functions missing
Voltage-20V-20V-20V-20V-20V — no 10% margin; DMG2305UX: no 10% margin; DMP2065UQ-7: no 10% margin; AO3415: no 10% margin
Current-3.5A-4.1A-4.1A-4.0A-4.1A / -4.0A / -4.3A — higher ID; DMG2305UX: higher ID; DMP2065UQ-7: higher ID; AO3415: higher ID
Resistance52mΩ52mΩ52mΩ60mΩ52mΩ / 60mΩ — @-4.5V; DMG2305UX: @-4.5V; DMP2065UQ-7: higher loss
LifecycleActive---Obsolete — sourcing risk

Application & sourcing insights

Questions & answers

DMP2120U looks closest in the provided data, but it still needs pinout and SOA review.