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TLP521-4GB from TOS,TOSHIBA

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TLP521-4GB

Manufacturer: TOS, TOSHIBA, TOSH

HIGH DENSITY MOUNTING PHOTOTRANSISTOR OPTICALLY COUPLED ISOLATORS

Partnumber Manufacturer Quantity Availability
TLP521-4GB,TLP5214GB TOS, TOSHIBA, TOSH 43305 In Stock

Description and Introduction

HIGH DENSITY MOUNTING PHOTOTRANSISTOR OPTICALLY COUPLED ISOLATORS The TLP521-4GB is an optocoupler manufactured by **TOSHIBA**. Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:  

### **Specifications:**  
- **Type**: Phototransistor Output Optocoupler  
- **Number of Channels**: 4  
- **Input-Output Isolation Voltage**: 5000 Vrms (min)  
- **Collector-Emitter Voltage (VCEO)**: 80 V (max)  
- **Collector Current (IC)**: 50 mA (max)  
- **Current Transfer Ratio (CTR)**: 50% (min) at IF = 5 mA, VCE = 5 V  
- **Input Forward Current (IF)**: 25 mA (max)  
- **Forward Voltage (VF)**: 1.25 V (typ) at IF = 10 mA  
- **Response Time (tPLH/tPHL)**: 18 μs / 18 μs (typ)  
- **Operating Temperature Range**: -55°C to +110°C  

### **Descriptions:**  
- The TLP521-4GB is a **4-channel** optocoupler with a **phototransistor output**, providing electrical isolation between input and output.  
- It is designed for **signal transmission** in high-voltage environments while maintaining isolation.  
- The device is commonly used in **industrial control systems, communication interfaces, and power supply feedback circuits**.  

### **Features:**  
- **High isolation voltage (5000 Vrms)** for safety and noise immunity.  
- **Compact 16-pin DIP package** for space-efficient PCB mounting.  
- **Reliable performance** across a wide temperature range (-55°C to +110°C).  
- **Low power consumption** with a typical forward voltage of 1.25 V.  
- **High current transfer ratio (CTR)** for efficient signal transmission.  

This information is based on TOSHIBA's official documentation for the TLP521-4GB optocoupler.

Application Scenarios & Design Considerations

HIGH DENSITY MOUNTING PHOTOTRANSISTOR OPTICALLY COUPLED ISOLATORS

Alternative Part Number

  • PC817C --: Widely used single-channel optocoupler with similar CTR grade; a common drop-in style replacement for general isolation, though it is single-channel so four devices are needed for a quad application.
  • LTV-847 --: Quad-channel phototransistor optocoupler with comparable isolation voltage and CTR, directly matching the 4-channel function of the original.
  • PC847 --: Quad-channel optocoupler with similar current transfer ratio and isolation ratings, suitable as a functional equivalent for the TLP521-4.
  • EL817 --: Popular single-channel phototransistor optocoupler with comparable CTR and isolation ratings; a common drop-in functional substitute for TLP521 family designs.

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