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SI4542DY from VISHAY

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SI4542DY

Manufacturer: VISHAY, SILICONIX, SI, FAIRCHIL

N/P-Channel 30-V (D-S) Pair

Partnumber Manufacturer Quantity Availability
SI4542DY VISHAY, SILICONIX, SI, FAIRCHIL 4951 In Stock

Description and Introduction

N/P-Channel 30-V (D-S) Pair The SI4542DY is a power MOSFET manufactured by Fairchild Semiconductor (now part of ON Semiconductor). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**
- **Manufacturer:** FAIRCHILD (now part of ON Semiconductor)  
- **Part Number:** SI4542DY  
- **Type:** Dual N-Channel MOSFET  
- **Technology:** TrenchFET®  
- **Drain-Source Voltage (VDSS):** 30V  
- **Gate-Source Voltage (VGSS):** ±20V  
- **Continuous Drain Current (ID):** 6.3A per channel  
- **Pulsed Drain Current (IDM):** 25A per channel  
- **Power Dissipation (PD):** 2W per channel  
- **On-Resistance (RDS(on)):** 0.028Ω (max) at VGS = 10V  
- **Threshold Voltage (VGS(th)):** 1V to 2.5V  
- **Total Gate Charge (Qg):** 16nC (typical)  
- **Input Capacitance (Ciss):** 1100pF (typical)  
- **Output Capacitance (Coss):** 400pF (typical)  
- **Reverse Transfer Capacitance (Crss):** 100pF (typical)  
- **Operating Temperature Range:** -55°C to +150°C  
- **Package:** SOIC-8  

### **Description:**
The SI4542DY is a dual N-channel MOSFET designed for high-efficiency power management applications. It features low on-resistance and fast switching performance, making it suitable for DC-DC converters, motor control, and load switching.

### **Features:**
- **Low RDS(on)** for reduced conduction losses.  
- **Optimized for high-frequency switching** in power applications.  
- **TrenchFET® technology** for improved performance.  
- **Dual N-Channel configuration** in a single package.  
- **Lead-free and RoHS compliant.**  

This information is based solely on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

N/P-Channel 30-V (D-S) Pair

Alternative Part Number

  • FDS8958A --: Dual N-channel MOSFET in SO-8 with comparable RDS(on) and voltage rating, suitable drop-in replacement for the SI4542DY.
  • IRF7341 --: Dual N-channel MOSFET in SO-8 package with similar current and voltage ratings, widely used as an alternative to Vishay dual MOSFETs.
  • NTMD4840NR2G --: Dual N-channel MOSFET in SO-8 with comparable on-resistance and ratings, offering a different series naming for easy distinction.
  • NTMD4840NR2 --: Dual N-channel SO-8 MOSFET offering comparable on-resistance and current handling, suitable as a functional substitute where pinout and ratings match.
  • IRF7309 --: Dual N-channel 30V MOSFET in SO-8 package with similar current and on-resistance characteristics, widely available alternative.

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