**Application Introduction:** SSM3J327R-VB is a P-Channel MOSFET, suitable for a variety of applications, **Detailed parameter description:** 1. **Package Type:** SOT23-3, indicating that the device uses SOT23-3 package. 2. **Channel Type:** P-Channel, indicating that this is a P-channel MOSFET. 3. **Rated Voltage:** -20V, indicating the maximum negative voltage that the device can work normally. 4. **Maximum Current:** -4A, indicating the maximum current that the device can withstand, and the negative sign indicates that the current direction is from drain to source. 5. **On-State Resistance:** RDS(ON) = 80 (mΩ) @ VGS = 2.5V, 65 (mΩ) @ VGS = 4.5V, 60 (mΩ) @ VGS = 10V; VGS = 12V, indicating the resistance in the on state under a specific gate-source voltage. 6. **Threshold Voltage:** Vth = -0.81V, indicating the minimum voltage required for the device to switch from the off state to the on state under the action of the gate-source voltage.