CNW11AV3S Equivalent & Substitute Parts

Part Overview

The CNW11AV3S is an optoisolator transistor with base output manufactured by onsemi, designed for applications requiring galvanic isolation up to 4000Vrms. This component features a single channel configuration in a 6-SMD surface mount package with transistor output and base connection capability.

The CNW11AV3S is classified as obsolete. Identifying suitable substitute components is necessary to maintain design continuity and ensure availability for new production runs or system updates.

Substiute Parts

CNW11AV3S

onsemiIn Stock: 1037CNW11AV3S Datasheet

Current PartRFQ

CNY173SM

onsemiIn Stock: 2035CNY173SM Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CNW11AV3S is determined by the following critical parameters:

• Isolation Voltage: Minimum 4000Vrms to maintain equivalent isolation performance
• Output Type: Transistor with Base configuration for circuit compatibility
• Package Configuration: 6-SMD, Gull Wing surface mount for PCB layout compatibility
• Output Voltage Rating: Maximum 70V to ensure safe operation in target applications
• Current Capacity: Output current capability of at least 100mA per channel
• Vce Saturation: Maximum 400mV for switching performance equivalence

The CNY173SM meets these substitution criteria while offering enhanced electrical characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

The CNY173SM is a direct substitute for the CNW11AV3S based on the following factors:

Compliance and Product Status: The CNY173SM is an active product with ROHS3 compliance, whereas the CNW11AV3S is obsolete and RoHS non-compliant. For new designs or production requiring regulatory compliance, the CNY173SM is the appropriate selection.

Electrical Equivalence: Both components share identical package configuration (6-SMD, Gull Wing), output type (Transistor with Base), maximum output voltage (70V), and Vce saturation rating (400mV). The CNY173SM provides higher isolation voltage (4170Vrms vs. 4000Vrms) and superior current transfer ratio performance (100-200% vs. 20% minimum).

Design Consideration: The CNY173SM has a reduced maximum output current rating (50mA vs. 100mA). Applications requiring the full 100mA output current of the CNW11AV3S must be evaluated to confirm compatibility with the 50mA limit of the CNY173SM.

Frequently Asked Questions (FAQ)

Q: Can the CNY173SM directly replace the CNW11AV3S in existing designs?

A: The CNY173SM is electrically compatible for most applications due to matching package, output type, and saturation characteristics. However, designs dependent on 100mA output current must be reviewed, as the CNY173SM is rated for 50mA maximum output current per channel.

Q: What is the significance of the higher current transfer ratio in the CNY173SM?

A: The CNY173SM provides a current transfer ratio of 100-200% at 10mA input, compared to 20% minimum for the CNW11AV3S. This indicates more efficient optical coupling and typically results in faster switching response and lower input current requirements.

Q: Are there package compatibility concerns when substituting these components?

A: Both components use identical 6-SMD, Gull Wing surface mount packaging. PCB footprints and reflow soldering profiles are compatible without modification.

Q: Why is RoHS compliance important for this substitution?

A: The CNY173SM is ROHS3 compliant while the CNW11AV3S is non-compliant. For applications subject to RoHS regulations or customer requirements, the CNY173SM meets current environmental and material restriction standards.

Q: What are the timing differences between these components?

A: The CNY173SM provides specified turn-on/turn-off times (2µs, 3µs) and rise/fall times (4µs, 4.6µs maximum), whereas the CNW11AV3S does not specify these parameters. Applications with strict timing requirements benefit from the documented switching characteristics of the CNY173SM.