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SI2301CDS SOT-23 P-Channel MOSFET −20V 2.3A Logic-Level SMD (10-Pack)
SI2301CDS SOT-23 P-Channel MOSFET −20V 2.3A Logic-Level SMD (10-Pack)
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SI2301CDS SOT-23 P-Channel MOSFET — −20V / 2.3A Logic-Level SMD (10-Pack)
The SI2301CDS is a P-Channel enhancement-mode MOSFET from Vishay in a compact SOT-23 surface-mount package, rated at −20V / 2.3A with an RDS(on) of 120mΩ. Its low gate threshold voltage of −0.4V to −1.0V enables full enhancement from 3.3V and 5V MCU logic — the P-Channel complement to the SI2302DS for high-side load switching applications.
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | SI2301CDS / SI2301BDS |
| Package | SOT-23 (SMD) |
| Channel Type | P-Channel |
| V(DS) Max | −20V |
| I(D) Continuous | −2.3A @ 25°C |
| RDS(on) Max | 120mΩ @ VGS=−4.5V |
| VGS(th) | −0.4V to −1.0V |
| VGS Max | ±8V |
| Qg (Total Gate Charge) | 4.5nC typical |
| Quantity | 10 pieces |
SI2301CDS vs SI2302DS — Complementary Pair
| Feature | SI2301CDS (P-Ch) | SI2302DS (N-Ch) |
|---|---|---|
| Channel | P-Channel | N-Channel |
| V(DS) | −20V | 20V |
| I(D) | 2.3A | 2.5A |
| RDS(on) | 120mΩ | 85mΩ |
| Use Case | High-side switch | Low-side switch |
Why Choose SI2301CDS?
- Logic-Level Gate — VGS(th) −0.4V to −1.0V; fully enhanced at VGS=−4.5V from 5V MCU
- High-Side Switching — P-Channel topology enables simple high-side load switch without gate driver
- SOT-23 Package — Minimal PCB footprint for dense SMD designs
- Complementary to SI2302DS — Use together for H-bridge or CMOS push-pull output stage
- Pack of 10 — Ideal for prototyping and small production runs
Typical Applications
- High-side load switch for 3.3V/5V/12V DC loads
- Battery power path management (reverse polarity protection)
- CMOS push-pull output stage (with SI2302DS N-Channel)
- Li-ion battery protection high-side switch
- USB power switch and current limiting
- LED backlight enable/disable control
FAQ
Q: How do I drive SI2301CDS from a 3.3V MCU for high-side switching?
A: Connect source to VCC (e.g., 5V). Pull gate to GND via N-Channel transistor (2N7002) controlled by MCU GPIO. When N-Channel turns on, gate is pulled to GND, VGS = −5V, P-Channel turns on.
Q: Can SI2301CDS replace AO3401?
A: Yes — both are SOT-23 P-Channel MOSFETs with similar ratings. SI2301CDS has slightly lower current (2.3A vs 4A) but similar VGS(th).
Package Contents
- 10× SI2301CDS SOT-23 P-Channel MOSFET
