CNY1743S

Transistor, Photovoltaic Output Optoisolators Overview

The CNY1743S is a single-channel transistor output optocoupler manufactured by onsemi. It integrates an aluminum gallium arsenide infrared emitting diode with an NPN phototransistor that includes a base terminal for enhanced switching control. The device provides electrical isolation with a rated insulation voltage of 5300 Vrms. Key electrical parameters include a maximum collector-emitter voltage of 70 V, a forward current of 60 mA, and a typical current transfer ratio of 200%. The component operates within a temperature range of -55°C to +100°C and is housed in a surface-mount SMD-6 package.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrates an AlGaAs infrared LED with an NPN phototransistor featuring a dedicated base terminal for improved turn-off speed and noise immunity.
• Provides high-voltage isolation capability suitable for demanding industrial environments.
• Offers a compact surface-mount form factor designed for automated assembly processes.

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial automation systems requiring signal isolation
• Solid-state relay driver circuits
• Microcontroller interface isolation

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the obsolete status of this part number before design finalization. Confirm availability through authorized distributors or secondary markets. Ensure any substitute components meet the required isolation voltage and pinout compatibility specifications for your specific application.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when base-controlled switching performance is required to minimize storage time. Evaluate the thermal management requirements for the SMD-6 package. Compare the current transfer ratio variations against your logic level requirements to ensure reliable operation across the specified temperature range.

Transistor, Photovoltaic Output Optoisolators Part Context

This device belongs to the CNY17 series of transistor output optocouplers. It shares functional similarities with other models in the family but distinguishes itself through the inclusion of a base terminal on the phototransistor. This feature allows for external control of the transistor's state, offering advantages over standard configurations in high-speed or noisy applications.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Public confirmed substitutes include Broadcom Limited CNY17-1-300E. Verify pinout compatibility and electrical parameter equivalence before implementation.

Transistor, Photovoltaic Output Optoisolators FAQ

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

The base terminal allows for external control of the phototransistor, enabling faster turn-off times and improved immunity to noise compared to devices without a base connection.

What is the maximum operating temperature for the CNY1743S?

The maximum operating temperature is +100°C.