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AO3401 SOT-23 P-Channel MOSFET −30V 4A SMD (20-Pack)
AO3401 SOT-23 P-Channel MOSFET −30V 4A SMD (20-Pack)
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AO3401 SOT-23-3 P-Channel MOSFET — −30V / 4A SMD
The AO3401 is a P-Channel enhancement-mode MOSFET in a compact SOT-23-3 surface-mount package, rated at −30V / 4A with an ultra-low RDS(on) of 52mΩ. It is widely used in load switching, reverse polarity protection, and battery management circuits in portable electronics.
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | AO3401 |
| Package | SOT-23-3 (SMD) |
| Channel Type | P-Channel |
| V(DS) Max | −30V |
| I(D) Continuous | −4A @ 25°C |
| RDS(on) Max | 52mΩ @ VGS=−4.5V |
| VGS(th) | −0.45V to −1.2V |
| VGS Max | ±12V |
| Quantity | 20 pieces |
Why Choose AO3401?
- Ultra-Low RDS(on) — 52mΩ minimizes conduction losses in load switch applications
- Low Gate Threshold — Fully enhanced at VGS = −4.5V, logic-level compatible with 3.3V/5V MCUs
- SOT-23-3 Package — Minimal PCB footprint for space-constrained designs
- High Reliability — AOS (Alpha & Omega Semiconductor) quality, widely used in consumer electronics
- Pack of 20 — Ideal for prototyping and small production runs
Typical Applications
- High-side load switching (battery-powered devices)
- Reverse polarity protection circuits
- Li-ion battery protection BMS circuits
- Power path management in USB chargers
- LED backlight control and PWM dimming
- Motor direction control (H-bridge complement)
Compatible With
Commonly paired with AO3400 (N-Channel) for complementary H-bridge or push-pull designs. Gate driver compatible with 3.3V/5V MCU GPIO (Arduino, ESP32, STM32).
FAQ
Q: Can AO3401 be driven directly from a 3.3V MCU GPIO?
A: Yes — VGS(th) is −0.45V to −1.2V, so a 3.3V GPIO pulling gate to GND will fully enhance the device.
Q: What’s the difference between AO3401 and AO3401A?
A: AO3401A has slightly lower RDS(on) (45mΩ vs 52mΩ). Both are pin-compatible and interchangeable in most designs.
Package Contents
- 20× AO3401 SOT-23-3 P-Channel MOSFET
