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4N40 from QTC

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4N40

Manufacturer: QTC

PHOTO SCR OPTOCOUPLERS

Partnumber Manufacturer Quantity Availability
4N40 QTC 5548 In Stock

Description and Introduction

PHOTO SCR OPTOCOUPLERS The 4N40 is a general-purpose optocoupler manufactured by QT Optoelectronics (QTC). It features a gallium arsenide infrared LED optically coupled to a silicon phototransistor. Key specifications include:

- **Isolation Voltage**: 5000 Vrms
- **Collector-Emitter Voltage (VCEO)**: 30 V
- **Collector Current (IC)**: 50 mA
- **Current Transfer Ratio (CTR)**: 20% to 300% (depending on the model variant)
- **Operating Temperature Range**: -55°C to +110°C
- **Package**: DIP-6 (Dual In-line Package)

The 4N40 is commonly used in applications requiring electrical isolation, such as power supply feedback, signal isolation, and interfacing between high-voltage and low-voltage circuits.

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