CNY172S

Transistor, Photovoltaic Output Optoisolators Overview

The CNY172S is a single-channel transistor output optocoupler manufactured by onsemi. It features an NPN phototransistor with a base terminal for enhanced switching control and stability. The device provides high isolation voltage, documented at 5300 Vrms in official datasheets, ensuring robust signal transmission across isolated circuits. Key electrical parameters include a maximum collector-emitter voltage of 70 V and a continuous collector current of 50 mA. The input side utilizes an infrared LED with a typical forward voltage of 1.65 V and a maximum forward current of 60 mA. Switching characteristics are defined by a typical rise time of 6 µs and a fall time of 24 µs. The component is housed in a surface-mount SMD-DIP-6 package, suitable for automated assembly processes.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrated base terminal on the NPN phototransistor allows for improved switching speed and noise immunity compared to standard configurations.
• High dielectric isolation capability ensures reliable operation in high-voltage environments while protecting low-voltage control circuitry.
• Surface-mount packaging facilitates compact board design and compatibility with modern SMT manufacturing techniques.

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial automation systems requiring galvanic isolation between control logic and power stages.
• Solid-state relay (SSR) driver circuits for switching AC or DC loads.
• Microcontroller interface circuits where digital signals must be isolated from noisy power domains.

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix 'S' corresponds to the tape-and-reel or specific packaging variant required for your assembly line. Confirm that the 5300 Vrms isolation rating meets your system's safety clearance requirements. Ensure the 60 mA maximum forward current limit is respected in your LED drive design to maintain device longevity. Cross-reference the SMD-DIP-6 footprint dimensions with your PCB layout library to guarantee mechanical fit.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when a phototransistor output with a base pin is necessary for faster response times or better saturation control. Compare the 70 V collector-emitter voltage against the load requirements to ensure adequate headroom. Consider the 6 µs rise time if the application involves higher frequency signal transmission, as slower devices may introduce timing errors. Evaluate the thermal dissipation capabilities within the SMD-DIP-6 package under continuous operating conditions.

Transistor, Photovoltaic Output Optoisolators Part Context

The CNY172S belongs to the broader family of transistor output optocouplers offered by onsemi. It shares functional similarities with other models in the series but distinguishes itself through the inclusion of a base terminal on the output transistor. This feature differentiates it from basic phototransistor optocouplers that lack external base access. The device is part of onsemi's portfolio aimed at providing reliable isolation solutions for industrial and consumer electronics applications.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Direct replacements should be sought among other 6-pin SMD transistor output optocouplers with base terminals. Verify that substitute parts match the 5300 Vrms isolation rating and 70 V collector-emitter voltage specifications. Check for equivalent switching speeds, specifically rise and fall times near 6 µs and 24 µs respectively. Ensure the replacement maintains the same pinout configuration for the SMD-DIP-6 package to avoid PCB redesign.

Transistor, Photovoltaic Output Optoisolators FAQ

What is the purpose of the base terminal on the phototransistor?

The base terminal allows for external connection to improve switching speed, reduce storage time, and enhance noise immunity by providing a path for charge removal.

What is the maximum isolation voltage for the CNY172S?

The device supports an isolation voltage of 5300 Vrms, as specified in the official product documentation.

Does the CNY172S support surface-mount technology?

Yes, the CNY172S is available in an SMD-DIP-6 package designed for surface-mount assembly.