4N35SR2M

The 4N35 is an optocoupler consisting of an infrared emitting diode optically coupled to a phototransistor. When current flows through the infrared emitting diode (LED), it emits infrared light that is detected by the phototransistor, thereby allowing electrical isolation between the input and output circuits.

Key Features:

• Electrical Isolation: Provides electrical isolation between input and output circuits, protecting sensitive components from high voltages, noise, and interference.
• High CTR (Current Transfer Ratio): Offers a high current transfer ratio, indicating the ratio of output current to input current.
• Phototransistor Output: Includes a phototransistor output, allowing for interfacing with digital or analog circuits.
• Compact Package: Available in a compact package, such as 6-pin DIP (Dual Inline Package) or surface-mount options, facilitating easy integration into circuit designs.
• Wide Temperature Range: Suitable for operation over a wide temperature range, making it versatile for various environmental conditions.
• RoHS Compliance: Manufactured with materials and processes compliant with RoHS regulations, ensuring environmental sustainability.

Applications:

• Isolated Signal Transfer: Used for transferring signals between circuits with different ground potentials, such as between microcontrollers and power devices.
• Switching and Amplification: Applied in switching and amplification circuits for controlling relays, transistors, and other electronic components.
• Noise and Surge Suppression: Employed for noise and surge suppression in industrial automation, motor control, and power supply circuits.
• Feedback Control: Utilized in feedback control loops and isolation amplifiers for providing feedback signals without ground loops.
• Communication Interfaces: Integrated into communication interfaces, such as UART, SPI, and I2C, for galvanic isolation between devices.
• Medical Devices: Found in medical devices and equipment for patient isolation and safety, such as in electrocardiography (ECG) and patient monitoring systems.