4N26300W

Overview

The onsemi 4N26300W is a high-voltage optoisolator featuring an infrared LED coupled to a phototransistor with a base lead for improved switching performance. It provides robust electrical isolation of 5300 Vrms between input and output circuits, ensuring safety in high-potential environments. The device utilizes a standard 6-DIP package suitable for through-hole mounting. Key electrical characteristics include a maximum collector-emitter voltage of 30V and a minimum current transfer ratio of 20% at 10mA forward current. Operating temperatures range from -40°C to 100°C, supporting reliable function in demanding industrial conditions.

Feature Summary

• High isolation voltage capability of 5300 Vrms for safe circuit separation
• Integrated base lead on the phototransistor to enhance switching speed and sensitivity
• Wide operating temperature range supporting harsh environmental applications

Applications

• Industrial control systems requiring galvanic isolation
• Power supply feedback loops for voltage monitoring
• Solid-state relay driver circuits
• Microcontroller interface isolation for noise immunity

Procurement Notes

Verify the specific suffix '300' against official datasheets to confirm the 5300 Vrms isolation rating, as standard 4N26 variants may differ. Ensure the procurement specification matches the 6-DIP package type and through-hole installation requirements. Confirm compliance with relevant safety certifications such as UL or CSA if required by the end-application standards. Cross-reference the manufacturer part number to avoid confusion with similar logic gate optocouplers.

Selection Notes

Select this component when high-voltage isolation is critical and faster switching than standard phototransistors is needed due to the base lead. Compare the 5300 Vrms rating against system insulation requirements to ensure adequate safety margins. Evaluate the current transfer ratio specifications to guarantee sufficient output drive for downstream logic or relay inputs. Consider the thermal operating range to match the environmental constraints of the target equipment design.

Part Context

This device belongs to the widely used 4N26 family of optoisolators, which are industry-standard components for basic isolation tasks. The 4N26300W variant specifically distinguishes itself by offering enhanced isolation voltage compared to lower-rated siblings. It serves as a fundamental building block for separating low-voltage control signals from high-voltage power stages in various electronic assemblies.

Replacement Considerations

Direct substitutes include other 4N26 series parts with verified 5300 Vrms ratings, such as the 4N26M or 4N26TVM, provided they meet the same pinout and isolation specifications. Verify that any replacement maintains the base-lead configuration for equivalent switching performance.