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IL55B from INFINEON

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IL55B

Manufacturer: INFINEON

PHOTODARLINGTON OPTOCOUPLER

Partnumber Manufacturer Quantity Availability
IL55B INFINEON 3252 In Stock

Description and Introduction

PHOTODARLINGTON OPTOCOUPLER The part **IL55B** is manufactured by **Infineon**. Below are the specifications, descriptions, and features based on available information:

### **Specifications:**
- **Manufacturer:** Infineon Technologies  
- **Part Number:** IL55B  
- **Type:** Optocoupler / Optoisolator  
- **Isolation Voltage:** Typically 5kV (exact value may vary)  
- **Output Type:** Phototransistor  
- **Current Transfer Ratio (CTR):** Varies based on conditions (e.g., 50% to 600%)  
- **Input Current (Forward Current - IF):** Typically 5mA to 50mA  
- **Output Collector-Emitter Voltage (VCEO):** Typically 30V to 70V  
- **Operating Temperature Range:** -40°C to +85°C (or +100°C, depending on variant)  
- **Package Type:** Typically DIP-4 or similar through-hole/SMD package  

### **Descriptions:**
- The **IL55B** is an optocoupler designed to provide electrical isolation between input and output circuits.  
- It consists of an infrared LED (input side) and a phototransistor (output side) in a single package.  
- Commonly used for signal isolation, noise suppression, and interfacing in industrial, automotive, and consumer electronics.  

### **Features:**
- **High Isolation Voltage:** Ensures safety in high-voltage applications.  
- **Fast Switching Speed:** Suitable for digital signal transmission.  
- **Wide CTR Range:** Provides flexibility in design.  
- **Reliable Performance:** Long operational lifespan under specified conditions.  
- **Compliance:** Meets industry standards for optocouplers (e.g., UL, IEC).  

For exact datasheet details, refer to **Infineon’s official documentation** for the IL55B.

Application Scenarios & Design Considerations

PHOTODARLINGTON OPTOCOUPLER

Alternative Part Number

  • SFH615A-2 --: Industry-standard optocoupler with similar CTR and isolation ratings, widely available and pin-compatible in most IL55B sockets.
  • PC817X2 --: Common 5-pin optocoupler offering comparable current transfer ratio and isolation voltage, suitable as a functional replacement.
  • TLP521-1 --: Reliable single-channel optocoupler with similar electrical characteristics and pinout, often used to replace IL55B in industrial designs.
Partnumber Manufacturer Quantity Availability
IL55B VISHAY 50 In Stock

Description and Introduction

PHOTODARLINGTON OPTOCOUPLER The IL55B is a phototransistor optocoupler manufactured by **VISHAY**. Below are the key specifications, descriptions, and features based on the available knowledge:

### **Specifications:**
- **Isolation Voltage:** 5300 Vrms  
- **Collector-Emitter Voltage (VCEO):** 30 V  
- **Emitter-Collector Voltage (VECO):** 5 V  
- **Collector Current (IC):** 50 mA  
- **Power Dissipation:** 150 mW  
- **Current Transfer Ratio (CTR):** 50% (min) at IF = 10 mA  
- **Rise Time (tr):** 3 μs  
- **Fall Time (tf):** 4 μs  
- **Operating Temperature Range:** -55°C to +100°C  

### **Description:**
- The **IL55B** is a **phototransistor optocoupler** that provides electrical isolation between input and output circuits.  
- It consists of an **infrared LED** optically coupled to a **silicon phototransistor** in a **6-pin DIP package**.  
- Suitable for **signal isolation, switching applications, and digital logic interfacing**.  

### **Features:**
- **High isolation voltage (5300 Vrms)** for safety and noise immunity.  
- **Fast switching times** (3 μs rise, 4 μs fall).  
- **High current transfer ratio (CTR ≥ 50%)** for efficient signal transmission.  
- **Wide operating temperature range (-55°C to +100°C)** for harsh environments.  
- **Compact 6-pin DIP package** for easy PCB mounting.  

For exact performance characteristics, refer to the **VISHAY datasheet**.

Application Scenarios & Design Considerations

PHOTODARLINGTON OPTOCOUPLER

Alternative Part Number

  • SFH615A-2 --: Standard optocoupler in a DIP-4 package with similar CTR range and isolation ratings, widely available and a common drop-in replacement for IL-series parts.
  • PC817X2 --: Very common DIP-4 phototransistor optocoupler with comparable CTR and isolation voltage, often used as a cross-reference for IL55B in many designs.
  • LTV-817S --: Cost-effective DIP-4 optocoupler with similar electrical characteristics and isolation performance, suitable as a functional substitute.

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