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SFH6943-3T

Manufacturer: infineon

Low Current Input Mini Optocoupler

Partnumber Manufacturer Quantity Availability
SFH6943-3T,SFH69433T infineon 8829 In Stock

Description and Introduction

Low Current Input Mini Optocoupler The SFH6943-3T is a high-speed phototransistor manufactured by Infineon Technologies. Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Package:** SMD (Surface Mount Device), 4-pin  
- **Wavelength Range:** 850 nm (typical)  
- **Collector-Emitter Voltage (VCE):** 30 V (max)  
- **Emitter-Collector Voltage (VEC):** 5 V (max)  
- **Collector Current (IC):** 50 mA (max)  
- **Power Dissipation (Ptot):** 100 mW (max)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Storage Temperature Range:** -40°C to +100°C  
- **Switching Time (tr / tf):** 3 µs (typical)  

### **Descriptions:**  
- The SFH6943-3T is an NPN silicon phototransistor designed for high-speed optoelectronic applications.  
- It is optimized for use in infrared (IR) light detection, particularly in data communication and industrial sensing.  
- The device is RoHS-compliant and suitable for automated assembly processes.  

### **Features:**  
- **High Sensitivity:** Efficient detection of infrared light at 850 nm.  
- **Fast Response Time:** Suitable for high-speed signal transmission.  
- **Low Dark Current:** Ensures minimal noise in the absence of light.  
- **SMD Package:** Compact and suitable for PCB mounting.  
- **Reliable Performance:** Designed for industrial and communication applications.  

For detailed electrical and optical characteristics, refer to the official Infineon datasheet.

Application Scenarios & Design Considerations

Low Current Input Mini Optocoupler

Alternative Part Number

  • TCND5000 --: Reflective optical sensor in a similar SMD package, suitable for proximity and object detection applications as a functional replacement.
  • TCRT5000 --: Widely available reflective optical sensor with comparable emitter-detector configuration, commonly used as a drop-in substitute in sensing circuits.
  • GP2S700HCP --: Reflective photointerrupter with similar sensing function and compact SMD form factor, usable as an alternative with minor layout adjustment.
  • VOM617A-3T --: Optocoupler with similar CTR rank and SMD package, widely available and pin-compatible in most circuits.
  • TLP291-3 --: SMD phototransistor optocoupler with comparable isolation and CTR binning, suitable drop-in replacement.
  • PC817X3NSZ0F --: Industry-standard SMD optocoupler with similar CTR grade and isolation ratings, good second source.

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