IRLML6402 P-Channel Low-Voltage MOSFET ： SOT-23 High-Current Low-Resistance Premium Switching Device

Home Blogs Daily Highlight IRLML6402 P-Channel Low-Voltage MOSFET ： SOT-23 High-Current Low-Resistance Premium Switching Device

2026-08-26 21

In circuits such as portable consumer electronics, battery management systems, miniature motor drives, and smart home control modules, high-side power switches and load on-off control impose strict requirements on MOSFET conduction loss, current carrying capacity and switching response speed. The Slkor IRLML6402 is a P-channel enhancement-mode low-voltage MOSFET packaged in standard SOT-23. It features 20V withstand voltage, 3.7A continuous current and ultra-low on-resistance of 65mΩ, balancing excellent high-current processing capability and minimal conduction loss. It serves as a cost-effective domestic alternative ideal for high-side switching, battery anti-reverse connection and power path control scenarios.

1. Core Electrical Parameters

Device Type: P-Channel Enhancement Mode MOSFET Package: SOT-23 Drain-Source Breakdown Voltage (VDSS): 20V Continuous Drain Current (Id): 3.7A On-Resistance (RDSON): 0.065Ω @ -4.5V, -3.7A Gate Threshold Voltage (VTH): -1.2V @ -250μA

2. Core Product Advantages

2.1 Standard SOT-23 Package for Automated Production

Packaged in industry-standard SOT-23 surface-mount form factor, the IRLML6402 occupies minimal PCB space and features excellent SMT compatibility. It supports automated mass production and is widely adopted in space-limited circuit boards and portable device modules, achieving a perfect balance between product miniaturization and mass-production efficiency.

2.2 Ultra-Low On-Resistance Reduces High-Current Loss

With an ultra-low on-resistance of only 65mΩ at a gate driving voltage of -4.5V, the device stably supports 3.7A continuous operating current. It generates less heat under heavy-load conditions, effectively reducing circuit power consumption and temperature rise, and improving overall equipment efficiency and battery endurance.

2.3 P-Channel High-Side Drive Simplifies Power Control Circuits

As a P-channel MOSFET, it can be directly used for positive power high-side switching, realizing high-side load control, power anti-reverse protection and battery charge-discharge path switching. It eliminates the need for complex level conversion circuits and simplifies peripheral design compared with N-channel solutions requiring bootstrap drive, effectively reducing BOM cost.

2.4 Fast Switching Response and Strong Working Adaptability

The device delivers fast switching speed and stable threshold voltage characteristics with excellent anti-interference performance, making it suitable for frequent load switching scenarios. It supports a wide operating temperature range and fully meets the application requirements of consumer electronics and partial industrial environments.

2.5 Mature Domestic Process with Consistent Batch Quality

Adopting Slkor’s mature trench semiconductor process, the IRLML6402 features minor parameter deviation between batches, ultra-low leakage current and outstanding impact resistance. It can directly replace imported mainstream devices with stable spot supply, perfectly supporting mass-volume project selection and replacement.

3. Main Application Fields

The IRLML6402 is widely used in various low-voltage electronic devices, including battery management and charge-discharge protection circuits, high-side load switches, portable device power control, miniature DC motor drives, smart home modules, IoT control boards, LED power drivers, signal switching circuits, and power anti-reverse protection systems.

4. Engineering Design Guidelines

Voltage Margin: The device has a rated VDSS of 20V. Sufficient voltage margin is recommended in actual design to avoid device breakdown caused by surge spikes.

Current Derating: 3.7A is the maximum continuous rated current. Current derating is required for long-term operation. Due to the limited heat dissipation area of the SOT-23 package, enlarge PCB copper foil area for auxiliary heat dissipation under high-current working conditions.

Gate Drive Design: P-channel MOSFETs require negative VGS relative to the source for turn-on. Ensure the driving voltage reaches -4.5V to achieve minimum on-resistance. Connect a current-limiting resistor in series with the gate to suppress switching oscillation and voltage spikes.

Inductive Load Processing: When driving inductive loads such as motors and relays, add freewheeling diodes or RC absorption circuits to eliminate reverse induced electromotive force and protect the MOSFET.

5. Product Summary

The Slkor IRLML6402 is a high-performance P-channel power MOSFET in SOT-23 package, integrating 20V withstand voltage, 3.7A large current and 65mΩ ultra-low on-resistance. It excels in power high-side switching and battery protection circuits. Featuring compact size, low conduction loss and simplified peripheral circuits, it is a preferred domestic MOSFET solution for portable electronic products, IoT modules and miniature motor control systems.

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