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SI4943DY from VISHAY

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SI4943DY

Manufacturer: VISHAY, SIL, SI

Dual P-Channel 20-V (D_S) MOSFET

Partnumber Manufacturer Quantity Availability
SI4943DY VISHAY, SIL, SI 7248 In Stock

Description and Introduction

Dual P-Channel 20-V (D_S) MOSFET The SI4943DY is a dual N-channel and P-channel MOSFET manufactured by Vishay Siliconix.  

### **Specifications:**  
- **Drain-Source Voltage (VDS):**  
  - N-Channel: 30V  
  - P-Channel: -30V  
- **Gate-Source Voltage (VGS):** ±20V  
- **Continuous Drain Current (ID):**  
  - N-Channel: 5.5A  
  - P-Channel: -4.5A  
- **Power Dissipation (PD):** 2W  
- **On-Resistance (RDS(on)):**  
  - N-Channel: 50mΩ (VGS = 10V)  
  - P-Channel: 80mΩ (VGS = -10V)  
- **Threshold Voltage (VGS(th)):**  
  - N-Channel: 1V to 2.5V  
  - P-Channel: -1V to -2.5V  
- **Package:** SO-8  

### **Description:**  
The SI4943DY is a dual MOSFET combining an N-channel and P-channel MOSFET in a single SO-8 package. It is designed for high-efficiency power management applications, including DC-DC converters, motor control, and load switching.  

### **Features:**  
- Low on-resistance for reduced power loss  
- Fast switching speed  
- Logic-level gate drive compatibility  
- ESD protection  
- Lead-free and RoHS compliant  

This information is based on Vishay Siliconix's datasheet for the SI4943DY.

Application Scenarios & Design Considerations

Dual P-Channel 20-V (D_S) MOSFET

Alternative Part Number

  • FDS4935A --: Dual P-channel MOSFET in SO-8 with similar voltage and current ratings, widely available and pin-compatible.
  • IRF7324 --: Dual P-channel MOSFET in SO-8 offering comparable RDS(on) and current handling for load-switch applications.
  • NTMS4935NR2 --: Dual P-channel MOSFET in SO-8 with similar specifications, suitable as a drop-in replacement in most circuits.

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