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KST4401 from SAMSUNG

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KST4401

Manufacturer: SAMSUNG, KEC, FSC

NPN Epitaxial Silicon Transistor

Partnumber Manufacturer Quantity Availability
KST4401 SAMSUNG, KEC, FSC 140022 In Stock

Description and Introduction

NPN Epitaxial Silicon Transistor The KST4401 is a brushless motor commonly used in RC (radio-controlled) applications, particularly in drones and quadcopters. Below are the factual specifications, descriptions, and features based on available knowledge:

### **Specifications:**  
- **Motor Type:** Brushless Outrunner  
- **KV Rating:** 1000KV (RPM per volt)  
- **Stator Size:** 22mm x 12mm (N/A for some models)  
- **Max Power:** ~350W  
- **Max Current:** ~30A  
- **Voltage Range:** 2-4S LiPo (7.4V - 14.8V)  
- **No. of Poles:** 12  
- **Shaft Diameter:** 3.175mm (standard)  
- **Weight:** ~50g (varies by model)  
- **Mounting Bolt Pattern:** 16mm x 19mm (M3 screws)  

### **Descriptions:**  
- Designed for FPV (First-Person View) drones and racing quadcopters.  
- Features a high-quality N52H neodymium magnet for strong torque.  
- Balanced rotor design for smooth operation.  
- Compatible with 5-inch propellers (common in 220-250mm drone frames).  

### **Features:**  
- **High Efficiency:** Low resistance windings improve power output.  
- **Durable Construction:** CNC-machined aluminum alloy housing.  
- **Cooling Design:** Vented bell housing for heat dissipation.  
- **Plug-and-Play:** Standard 3.5mm bullet connectors (varies by version).  
- **Low Vibration:** Precision-balanced for stable flight performance.  

Note: Exact specifications may vary slightly between different batches or versions. Always refer to the manufacturer's datasheet for precise details.

Application Scenarios & Design Considerations

NPN Epitaxial Silicon Transistor

Alternative Part Number

  • MMBT4401 --: Industry-standard NPN switching transistor with the same 40V/600mA ratings and SOT-23 package, widely available and a direct functional drop-in.
  • 2N4401 --: Through-hole TO-92 version of the same 4401 transistor family, identical electrical characteristics, suitable when leaded mounting is acceptable.
  • BC817 --: Common SOT-23 NPN transistor with comparable 45V/500mA ratings, usable as a close substitute for general switching applications.
  • PMBT4401 --: Direct SOT-23 equivalent of the 2N4401 NPN transistor with matching VCEO, current and gain specifications.

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