SFH615A-3X

Overview

The SFH615A-3X is a single-channel NPN phototransistor output optocoupler manufactured by Isocom Components. It provides electrical isolation via an infrared LED and phototransistor pair, housed in a standard DIP-4 package suitable for through-hole mounting. The device features a minimum isolation voltage of 5300 Vrms, ensuring robust barrier protection between input and output circuits. Key electrical parameters include a maximum collector-emitter voltage of 70V and a continuous collector current rating of 50mA. The unit operates within a temperature range of -55°C to +100°C.

Feature Summary

• Provides high-voltage galvanic isolation between control and load circuits using infrared light transmission.
• Features a standard four-pin dual in-line package designed for reliable through-hole PCB integration.
• Utilizes an NPN phototransistor output stage capable of driving logic-level interfaces and switching applications.

Applications

• Logic-to-logic signal isolation in noisy industrial environments
• Line receiver circuits for communication interfaces
• Digital control systems for motors and servo machines

Procurement Notes

Verify the specific suffix designation (e.g., -3, -3XG) against official datasheets to confirm packaging format and compliance certifications. Ensure the selected variant matches the required isolation voltage and thermal operating range for the target application environment before finalizing procurement orders.

Selection Notes

Select this component when a standard NPN output configuration with high isolation voltage is required for through-hole assembly. Consider the 70V collector voltage limit and 50mA current capacity to ensure compatibility with downstream logic or switching loads. Verify that the DIP-4 footprint aligns with existing board layouts and manufacturing capabilities.

Part Context

This part belongs to the SFH615A series, which serves as a commercial-grade alternative to legacy optocouplers from manufacturers such as Vishay and Toshiba. Isocom Components specializes in reproducing industry-standard pinouts and electrical characteristics for discontinued or hard-to-source devices, facilitating design continuity for engineers maintaining older hardware platforms.

Replacement Considerations

Public confirmed substitute part numbers include VO615A-3 and TLP521-1. Cross-reference datasheet parameters such as CTR ranges and isolation voltages to ensure functional equivalence during replacement planning.