SI2309DS P-Channel 60V (D-S) MOSFET SOT-23

SI2309DS P-Channel 60V MOSFET (SOT-23) is a compact and efficient device tailored for low-power switching applications. Its small SOT-23 package makes it an excellent choice for space-constrained circuit boards, while the 60V rating provides enough margin for portable electronics, DC load switching, and battery-powered designs.

Key Features:

• 60 V Drain-Source Voltage: Suitable for a wide range of DC switching tasks.
• P-Channel Design: Enables simple high-side load switching without complex gate drivers.
• Compact SOT-23 Package: Ideal for dense PCB layouts and handheld devices.
• Low On-Resistance: Provides efficient conduction, reducing heat losses in the circuit.
• Fast Switching Speed: Supports quick on/off transitions for power management systems.
• Low Gate Charge: Eases drive requirements, conserving energy in battery-based systems.

Technical Specifications:

• Drain-Source Voltage (V_DSS): −60 V
• Continuous Drain Current (I_D): −2.8 A (at T_A = 25 °C)
• On-Resistance (R_DS(on)): ~0.12 Ω typical @ V_GS = −10 V
• Gate Threshold Voltage (V_GS(th)): −1 V to −3 V
• Total Gate Charge (Q_g): ~8 nC typical
• Power Dissipation (P_D): ~1 W (limited by package)
• Operating Junction Temperature: −55 °C to +150 °C
• Gate-Source Voltage Range: ±20 V

Mechanical Specifications:

• Package: SOT-23 surface-mount package
• Leads: Matte tin-plated terminals compatible with lead-free soldering
• Encapsulation: Molded epoxy case for durability and insulation
• Mounting: Surface-mount design suitable for reflow soldering

Dimensions:

• Body Length: ~2.9 mm
• Body Width: ~1.3 mm
• Body Height: ~1.1 mm
• Lead Pitch: 0.95 mm standard for SOT-23

Pinout and Wiring:

• Pin 1: Gate
• Pin 2: Source
• Pin 3: Drain
• Wiring Tip: Place the MOSFET as a high-side switch by tying the source to the positive rail, then drive the gate below source voltage to turn it on.

Datasheet Reference:

• SI2309DS datasheet

Applications:

• Battery Protection: Ideal for disconnecting loads to prevent deep discharge.
• Load Switching: Controls small DC motors, LEDs, and logic circuits.
• Power Management: Useful in portable devices where space and efficiency matter.
• DC/DC Converters: Provides efficient switching in step-up and step-down regulator circuits.

Equivalent Models:

• SI2333DS: Similar voltage with different R_DS(on) profile
• IRLML6402: Alternative P-channel MOSFET with close electrical ratings
• AO3407A: Widely used P-channel device in the same package

Package Includes:

• 1 x SI2309DS P-Channel 60V MOSFET (SOT-23)