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TLP521-1 from TOSHIBA

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TLP521-1

Manufacturer: TOSHIBA, TOS, TOSH, SHARP, TOSHABI, TOSHIBA.

Photocoupler GaAs Ired & Photo -Transistor

Partnumber Manufacturer Quantity Availability
TLP521-1,TLP5211 TOSHIBA, TOS, TOSH, SHARP, TOSHABI, TOSHIBA. 64820 In Stock

Description and Introduction

Photocoupler GaAs Ired & Photo -Transistor The TLP521-1 is an optocoupler manufactured by **TOSHIBA**. Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:

### **Specifications:**  
- **Isolation Voltage:** 5000 Vrms (min)  
- **Collector-Emitter Voltage (VCEO):** 55 V (min)  
- **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):** 1.15 V (typ) at IF = 5 mA  
- **Operating Temperature Range:** -55°C to +110°C  

### **Description:**  
The **TLP521-1** is a **phototransistor optocoupler** that consists of a **GaAs infrared LED** optically coupled to a **silicon phototransistor**. It provides **electrical isolation** between input and output circuits, making it suitable for applications requiring noise immunity and signal isolation.  

### **Features:**  
- **High isolation voltage** (5000 Vrms)  
- **Compact 4-pin DIP package**  
- **High current transfer ratio (CTR)**  
- **Wide operating temperature range**  
- **Compliant with safety standards** (UL, cUL, VDE, etc.)  

This optocoupler is commonly used in **power supply feedback circuits, signal isolation, and industrial control systems**.  

(Note: All details are based on the manufacturer's datasheet and technical documentation.)

Application Scenarios & Design Considerations

Photocoupler GaAs Ired & Photo -Transistor

Alternative Part Number

  • PC817 --: Industry-standard single-channel phototransistor optocoupler with the same CTR range and pinout, widely used as a direct TLP521-1 replacement.
  • EL817 --: Pin-compatible single optocoupler with comparable isolation voltage and current transfer ratio, readily available and cost-effective.
  • LTV-817 --: Equivalent single-channel optocoupler with similar CTR, isolation rating and DIP-4 footprint, suitable for direct substitution.

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