4N25FVM

Overview

The onsemi 4N25FVM is a single-channel optocoupler featuring an infrared LED and an NPN phototransistor output. It utilizes a surface-mount 6-lead Small Outline (SOIC) package for compact integration. The device provides high isolation voltage capability, ensuring reliable signal transmission between isolated circuits. Key electrical characteristics include a minimum current transfer ratio of 100% at a forward current of 10mA, with typical rise and fall times of 3 microseconds. It operates within a temperature range of -40°C to +100°C and meets UL recognition standards for safety compliance in industrial applications.

Feature Summary

• Integrates an infrared emitting diode with an NPN phototransistor for efficient optical coupling
• Provides robust electrical isolation between input and output circuits
• Features fast switching performance suitable for digital signal transmission
• Complies with international safety standards including UL certification

Applications

• Industrial control systems requiring circuit isolation
• Signal transmission in microprocessor-based logic circuits
• Solid-state relay driver interfaces
• Power supply feedback loops for voltage regulation

Procurement Notes

Verify the specific suffix FVM confirms the surface-mount SOIC-6 packaging variant distinct from through-hole DIP versions. Confirm that the current transfer ratio specifications meet the design requirements for the intended load conditions. Ensure compatibility with standard reflow soldering profiles for surface-mount assembly processes. Check for any specific handling precautions related to electrostatic discharge sensitivity during storage and installation.

Selection Notes

Select this component when a surface-mount solution is required for single-channel isolation. Compare the current transfer ratio against the driving capability of the source circuit to ensure adequate noise margins. Evaluate the package dimensions against the available printed circuit board space constraints. Consider the operating temperature range to verify suitability for the environmental conditions of the final application.

Part Context

This part belongs to the 4N25 series of optocouplers, a widely recognized family for general-purpose isolation tasks. The FVM suffix specifically denotes the surface-mount configuration, offering advantages in automated assembly and reduced footprint compared to traditional through-hole packages. This series is established in industrial and consumer electronics for reliable signal transfer across isolation barriers.

Replacement Considerations

Direct pin-compatible replacements may include other manufacturers' 4N25 variants in SOIC-6 packages. Verify that substitute parts maintain equivalent isolation voltage ratings and current transfer ratios. Ensure that the alternative components share the same lead-free manufacturing process if environmental compliance is required.