SL5501S

Overview

The SL5501S is a single-channel optocoupler manufactured by onsemi, designed for high-voltage isolation applications. It features an input side consisting of an infrared LED and an output side with a phototransistor detector. The device provides a high voltage isolation rating of 5300Vrms between the input and output circuits, ensuring safe signal transmission across potential differences. Key electrical characteristics include a minimum current transfer ratio (CTR) of 25% at a forward current of 10mA. The component is housed in a compact 6-SMD, Gull Wing package, suitable for surface-mount assembly processes.

Feature Summary

• Provides robust galvanic isolation between control and power circuits using optical coupling technology.
• Supports high voltage differential signaling with a rated isolation capability of 5300Vrms.
• Delivers reliable digital signal transmission through integrated infrared LED and phototransistor elements.

Applications

• Industrial automation systems requiring isolated sensor interfaces
• Power supply feedback loops for voltage regulation
• Communication interfaces in noisy electromagnetic environments

Procurement Notes

Verify the obsolete status of this specific part number before initiating procurement actions. Confirm availability through authorized distributors or secondary market suppliers as standard production may have ceased. Ensure that any substitute components meet the same isolation voltage and package requirements to maintain system integrity and compliance with original design specifications.

Selection Notes

Select this component when high voltage isolation is critical for safety and noise immunity in single-channel signal transmission. Consider the 5300Vrms rating for applications involving significant potential differences between ground references. Evaluate the CTR specification against the required drive current to ensure adequate switching performance. Verify compatibility with the 6-SMD Gull Wing footprint during PCB layout and assembly planning.

Part Context

This optocoupler belongs to onsemi's portfolio of isolation devices, which are essential for protecting low-voltage control electronics from high-voltage power stages. Such components are widely used in industrial, automotive, and consumer electronics to break ground loops and prevent noise propagation. The SL5501S specifically addresses needs for compact, high-isolation solutions in space-constrained designs.

Replacement Considerations

As the SL5501S is marked obsolete, identify equivalent single-channel optocouplers with matching 5300Vrms isolation ratings and 6-SMD packages. Verify pinout compatibility and electrical parameters such as CTR and propagation delay to ensure seamless integration without redesigning the host circuit board.

FAQ

What is the maximum isolation voltage supported by the SL5501S?

The SL5501S supports a maximum isolation voltage of 5300Vrms between its input and output terminals.

What is the typical current transfer ratio for this device?

The device guarantees a minimum current transfer ratio of 25% when operated at a forward current of 10mA.