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SMA4021 from SK

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SMA4021

Manufacturer: SK

PNP Darlington With built-in flywheel diode

Partnumber Manufacturer Quantity Availability
SMA4021 SK 1435 In Stock

Description and Introduction

PNP Darlington With built-in flywheel diode The part **SMA4021** is manufactured by **SK**. Below are the specifications, descriptions, and features based on the available knowledge:  

### **Specifications:**  
- **Type:** Surface Mount Schottky Barrier Diode  
- **Package:** SOD-123FL  
- **Maximum Reverse Voltage (VR):** 40V  
- **Average Rectified Current (IO):** 2A  
- **Forward Voltage (VF):** 0.38V (at 1A)  
- **Reverse Current (IR):** 0.5mA (at VR = 40V)  
- **Operating Temperature Range:** -55°C to +150°C  

### **Descriptions:**  
- The **SMA4021** is a high-performance Schottky barrier diode designed for surface mount applications.  
- It offers low forward voltage drop and fast switching characteristics, making it suitable for power rectification and protection circuits.  

### **Features:**  
- **Low Forward Voltage Drop** – Enhances efficiency in power applications.  
- **Fast Switching Speed** – Suitable for high-frequency circuits.  
- **High Surge Current Capability** – Provides robustness in transient conditions.  
- **Lead-Free & RoHS Compliant** – Meets environmental standards.  

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

Application Scenarios & Design Considerations

PNP Darlington With built-in flywheel diode

Alternative Part Number

  • 2SC4021 --: Similar NPN power transistor with comparable voltage and current ratings, widely available and often used as a substitute in audio and switching applications.
  • 2SD4021 --: NPN power transistor with matching package style and similar electrical characteristics, suitable for direct replacement in many circuits.
  • MJE13007 --: High-voltage NPN power transistor with comparable current capability, commonly used as a cross-reference for similar switching and power applications.
  • KSA4021 --: Alternative 4021-series transistor with similar package and switching characteristics; verify pinout and gain.

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