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SFH6943-4T from infineon

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SFH6943-4T

Manufacturer: infineon

Low Current Input Mini Optocoupler

Partnumber Manufacturer Quantity Availability
SFH6943-4T,SFH69434T infineon 991 In Stock

Description and Introduction

Low Current Input Mini Optocoupler The SFH6943-4T is a high-speed phototransistor manufactured by Infineon. Below are its specifications, descriptions, and features based on the available knowledge:  

### **Specifications:**  
- **Package:** SMD (Surface Mount Device)  
- **Wavelength Range:** 850 nm (optimized for infrared light)  
- **Collector-Emitter Voltage (VCEO):** 30 V  
- **Emitter-Collector Voltage (VECO):** 5 V  
- **Collector Current (IC):** 50 mA  
- **Power Dissipation (Ptot):** 100 mW  
- **Operating Temperature Range:** -40°C to +85°C  
- **Switching Time (tr/tf):** Fast response time for high-speed applications  

### **Description:**  
The SFH6943-4T is a high-speed silicon NPN phototransistor designed for infrared detection. It is commonly used in optoelectronic applications such as optical encoders, light barriers, and industrial automation.  

### **Features:**  
- **High Sensitivity:** Optimized for 850 nm infrared light.  
- **Fast Switching:** Suitable for high-speed signal detection.  
- **Surface-Mountable:** Compact SMD package for PCB integration.  
- **Reliable Performance:** Stable operation across a wide temperature range.  

For exact performance characteristics, refer to the official Infineon datasheet.

Application Scenarios & Design Considerations

Low Current Input Mini Optocoupler

Alternative Part Number

  • LTV-846S --: Quad-channel optocoupler in SOP package with similar CTR and isolation ratings, direct functional replacement.
  • PC817X4NSZ0F --: Four-channel photocoupler in surface-mount package offering comparable current transfer ratio and isolation voltage.
  • TLP281-4 --: Quad optocoupler with similar input/output characteristics and SOP footprint, widely available alternative.

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