4N35-X017T

Overview

The Vishay 4N35-X017T is a single-channel phototransistor optocoupler featuring an infrared LED input and an NPN phototransistor output with a base connection. It provides 5000Vrms isolation voltage and operates within a temperature range of -55°C to 100°C. The device supports a maximum forward current of 60mA, a collector-emitter voltage of 30V, and a collector current of 50mA. It exhibits a typical current transfer ratio of 100% at 10mA input and switching times of 10µs for both turn-on and turn-off. Packaged in a 6-SMD surface-mount configuration.

Feature Summary

• Provides high-voltage electrical isolation between input and output circuits via double molding manufacturing process.
• Integrates a silicon NPN phototransistor with a dedicated base terminal for enhanced control and noise immunity.
• Ensures signal integrity through low input-output coupling capacitance, minimizing high-frequency noise interference.

Applications

• AC mains detection circuits
• Reed relay driving applications
• Switch mode power supply feedback loops
• Telephone ring detection systems
• Logic ground isolation interfaces

Procurement Notes

Verify the specific suffix X017T against official Vishay documentation to confirm package type and tape/reel specifications. Ensure compliance with RoHS Directive 2002/95/EC requirements. Confirm moisture sensitivity level classification prior to storage and handling procedures.

Selection Notes

Select this component when surface-mount packaging is required for standard 6-pin optocoupler footprints. The integrated base connection offers advantages over baseless variants for specific biasing needs. Verify thermal management capabilities within the specified operating temperature range during design integration.

Part Context

This part belongs to the industry-standard 4N35 family of single-channel phototransistor couplers manufactured by Vishay Semiconductor Opto Division. The series utilizes gallium arsenide infrared LEDs coupled with silicon NPN phototransistors. The X017T designation specifically indicates the surface-mount variant within this established product line.

Replacement Considerations

Direct substitutes include other Vishay 4N35 surface-mount variants such as 4N35-X007T and 4N35-X009T. Cross-brand equivalents must match the 6-SMD package, 5000Vrms isolation rating, and pinout configuration to ensure functional compatibility without PCB redesign.

FAQ

Does the 4N35-X017T include a base connection on the phototransistor?

Yes, the device features an NPN phototransistor output with a dedicated base terminal, allowing for external biasing or improved switching characteristics.

What is the maximum isolation voltage rating for this optocoupler?

The component is rated for an isolation test voltage of 5000Vrms, achieved through Vishay's double molding isolation manufacturing process.