CNY171S

Transistor, Photovoltaic Output Optoisolators Overview

The onsemi CNY171S is a single-channel transistor output optocoupler designed for surface-mount applications. It features an NPN phototransistor with a base terminal, housed in a compact SMD-DIP-6 package. The device provides high isolation voltage of 4170 Vrms and supports a maximum collector current of 50 mA. Key electrical parameters include a forward current of 60 mA, a forward voltage of 1.65 V, and a collector-emitter saturation voltage of 400 mV. The unit operates within a temperature range of -40°C to +100°C and exhibits a rise time of 4 µs and a fall time of 20 µs.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrates an NPN phototransistor with a dedicated base terminal for enhanced switching control and faster response times compared to standard configurations.
• Provides robust electrical isolation between input and output circuits through a high dielectric strength barrier rated at 4170 Vrms.
• Utilizes a compact surface-mount package design suitable for automated assembly and space-constrained printed circuit board layouts.

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial automation systems requiring signal isolation between microcontrollers and power stages
• Solid-state relay drivers for switching AC or DC loads
• Power supply feedback loops for voltage regulation and monitoring

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix 'S' against official onsemi documentation to confirm the surface-mount variant and pinout configuration. Ensure compliance with RoHS directives by checking the manufacturer's latest certification records. Confirm that the selected component matches the required isolation voltage ratings for your specific circuit safety standards before finalizing procurement.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when a base terminal is required for improved turn-off speed or noise immunity in digital isolation applications. Compare the 4170 Vrms isolation rating against system safety requirements. Evaluate the 50 mA collector current limit to ensure it meets the load driving needs of the downstream circuitry without exceeding absolute maximum ratings.

Transistor, Photovoltaic Output Optoisolators Part Context

This device belongs to the CNY171 series of transistor output optocouplers manufactured by onsemi. The series is widely recognized for providing reliable galvanic isolation in various electronic designs. The CNY171S specifically adapts this technology for surface-mount technology (SMT) processes, offering a modern packaging alternative to traditional through-hole options while maintaining similar electrical performance characteristics.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Consult official cross-reference lists from onsemi for verified substitutes. Ensure any replacement maintains the same 6-SMD package footprint and pinout compatibility. Verify that alternative components meet or exceed the 4170 Vrms isolation voltage and 50 mA collector current specifications.

Transistor, Photovoltaic Output Optoisolators FAQ

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

The base terminal allows for external biasing or pulling down the base, which can improve switching speed and provide better control over the turn-off time compared to floating base configurations.

What is the maximum operating temperature for the CNY171S?

The maximum operating temperature for this component is +100°C, as specified in the thermal characteristics.