CNW138

Transistor, Photovoltaic Output Optoisolators Overview

The onsemi CNW138 is a single-channel optocoupler featuring a DC input and a Darlington transistor output with a base terminal. It utilizes an 8-pin PDIP package for through-hole mounting. The device provides an isolation voltage of 5kVrms, ensuring robust electrical separation between input and output circuits. It operates within a temperature range of -40°C to 150°C. Key electrical parameters include a maximum collector-emitter saturation voltage of 1.2V at 60mA output current and a minimum current transfer ratio of 300% at 1.6mA forward input current.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrates a high-gain Darlington output transistor structure with a dedicated base pin for enhanced control and faster switching characteristics compared to standard configurations.
• Provides high-voltage isolation capability suitable for demanding industrial environments requiring reliable signal transmission across galvanic barriers.
• Features a compact 8-pin DIP footprint designed for standard through-hole PCB assembly processes.

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial automation systems requiring isolated signal interfacing
• Solid-state relay driver circuits
• Microcontroller interface isolation for noisy environments

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix variant against the manufacturer's latest datasheet to ensure compatibility with required isolation ratings and thermal specifications. Confirm that the 8-DIP package dimensions align with the target PCB layout constraints. Ensure compliance with relevant regional environmental directives for electronic components prior to integration into final assemblies.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when high current gain is necessary without external amplification. The integrated base allows for adjustable sensitivity and improved turn-off times. Consider the 5kVrms isolation rating for safety-critical applications. Evaluate the thermal performance within the specified operating temperature range to maintain consistent current transfer ratios under varying load conditions.

Transistor, Photovoltaic Output Optoisolators Part Context

This device belongs to the family of optoisolators manufactured by onsemi, formerly Fairchild Semiconductor. It serves as a bridge for transferring electrical signals between isolated circuits using light. The product line emphasizes reliability in harsh electromagnetic environments, providing essential protection for sensitive control electronics against high-voltage transients.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Direct substitutes may include other Darlington-output optocouplers in 8-DIP packages from onsemi or equivalent manufacturers. Verify matching isolation voltage, current transfer ratio, and package dimensions before substitution.

Transistor, Photovoltaic Output Optoisolators FAQ

What is the purpose of the base terminal on the Darlington output?

The base terminal allows for external connection to adjust the sensitivity and improve the switching speed of the Darlington pair, offering greater control over the output state.

What is the maximum isolation voltage supported by this component?

The CNW138 supports a maximum isolation voltage of 5000 Vrms between the input LED and the output transistor circuitry.