AO3401 A19T 30V 4A P-Channel Mosfet SOT-23

AO3401 A19T 30V 4A P-Channel MOSFET (SOT-23) is a compact, efficient P-channel MOSFET designed for high-speed switching and negative-side load control. It excels in portable electronics and battery-powered systems by enabling low-loss reverse polarity protection, load switching, and automotive power management.

Key Features:

• High-Speed Switching: Enables fast on/off control in dynamic circuits.
• Low R_DS(on): Delivers efficient conduction at V_GS = –4.5 V.
• Compact SOT-23 Package: Saves board space and suits surface-mount assembly.
• Reverse Polarity Protection: Prevents damage in battery-operated devices.
• Robust Performance: Handles –4 A continuous current at 25 °C ambient.

Technical Specifications:

• Drain-to-Source Voltage (V_DSS): –30 V max
• Continuous Drain Current (I_D): –4 A @ 25 °C
• R_DS(on): 0.1 Ω typical @ V_GS = –4.5 V
• Gate Threshold Voltage (V_GS(th)): –0.8 V to –2.5 V
• Total Gate Charge (Q_g): ~10 nC
• Power Dissipation (P_D): 0.5 W (on 1-in³ PCB, still air)

Mechanical Specifications:

• Package: SOT-23 (surface-mount)
• Lead Finish: Matte tin-plated leads
• Moisture Sensitivity Level (MSL): Level 1

Dimensions:

• Package Dimensions: 2.9 mm × 1.3 mm × 1.0 mm (L × W × H)
• Pin Pitch: ~0.95 mm
• Tab Area: Minimal copper pad for SOT-23 standard footprint

Pinout and Wiring:

• Pin 1 (Gate): Drives the MOSFET gate control voltage.
• Pin 2 (Source): Connect this to the high-potential side (e.g., battery or load output).
• Pin 3 (Drain): Route this to the load or downstream circuit.
• Wiring Tip: Use short traces and connect via proper layout to optimize switching performance.

Datasheet Reference:

• Search online for “AO3401 P-channel MOSFET datasheet”

Applications:

• Reverse Polarity Protection: Safeguard battery-powered circuits from reverse connect damage.
• High-Side Load Switch: Control power rails in portable and IoT devices.
• Battery Management: Integrate into battery chargers and power path controllers.
• Automotive Electronics: Manage accessory power with minimal voltage loss.
• Load Disconnect: Disconnect sensors or modules to conserve power in standby modes.

Equivalent Models:

• AOZ3401: SOT-23 P-channel MOSFET with similar voltage/current specs.
• BSS84: SOT-23 P-channel device rated for up to –50 V.
• P-channel 2N7002 equivalent: Enhances flexibility with similar footprint and behavior.

Package Includes:

• 1 × AO3401 A19T 30 V 4 A P-Channel MOSFET (SOT-23)