CNW11AV1 Optoisolator Equivalent & Substitute Parts

Part Overview

The CNW11AV1 is an optoisolator transistor with base output manufactured by onsemi, rated for 4000Vrms isolation voltage in a 6-DIP through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The CNW11AV1 provides 1-channel isolation with transistor output and base connection, suitable for DC input applications requiring galvanic isolation up to 4000Vrms.

Substiute Parts

CNW11AV1

onsemiIn Stock: 761CNW11AV1 Datasheet

Current PartRFQ

CNY171M

onsemiIn Stock: 20430CNY171M Datasheet

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4N35

onsemiIn Stock: 979644N35 Datasheet

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4N37

Vishay Semiconductor Opto DivisionIn Stock: 190924N37 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the CNW11AV1 is determined by the following critical parameters:

Primary Substitution Criteria:

• Single-channel optoisolator with transistor output and base connection
• DC input type
• Through-hole 6-DIP package configuration
• Isolation voltage rating of 4000Vrms or higher
• Output voltage capability of 30V or higher
• Output current capability of 50mA or higher
• Vce saturation rating of 400mV or lower

Substitute Parts Identified:

CNY171M (onsemi) - Active product with higher isolation voltage (4170Vrms), lower current transfer ratio range (40-80% @ 10mA), reduced output current (50mA), and RoHS3 compliance. Package dimensions differ (0.300" vs 0.400").

4N35 (onsemi) - Obsolete product with higher isolation voltage (5300Vrms), matching current transfer ratio minimum (100% @ 10mA), lower output voltage (30V), lower Vce saturation (300mV), and extended operating temperature range (-55°C to 100°C).

4N37 (Vishay Semiconductor Opto Division) - Active product with higher isolation voltage (5000Vrms), matching current transfer ratio minimum (100% @ 10mA), lower output voltage (30V), reduced output current (50mA), and RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

CNY171M Selection: Choose CNY171M for new designs requiring RoHS3 compliance and active product support. This part meets isolation voltage requirements with higher rating (4170Vrms) and maintains 70V output voltage capability. Note that current transfer ratio is lower (40-80% @ 10mA) and output current is reduced to 50mA. Package dimensions are smaller (0.300" vs 0.400"), which may require PCB layout adjustment.

4N35 Selection: Select 4N35 when higher isolation voltage (5300Vrms) is required and output voltage can be limited to 30V. This part matches the CNW11AV1 current transfer ratio minimum (100% @ 10mA) and maintains 100mA forward current capability. Product status is obsolete, limiting long-term availability.

4N37 Selection: Choose 4N37 for active product availability with RoHS3 compliance and 5000Vrms isolation voltage. This Vishay part matches the CNW11AV1 current transfer ratio minimum (100% @ 10mA) but limits output voltage to 30V and output current to 50mA. Extended operating temperature range (-55°C to 100°C) provides broader environmental capability.

Frequently Asked Questions (FAQ)

Q: Can CNY171M directly replace CNW11AV1 in existing designs?

A: CNY171M is functionally compatible as a substitute but requires design verification. The lower current transfer ratio (40-80% @ 10mA vs 100-300% @ 10mA) affects input current requirements. The reduced output current (50mA vs 100mA) may limit load capability. Package dimensions differ (0.300" vs 0.400"), requiring PCB layout modification.

Q: What are the key differences between 4N35 and 4N37?

A: Both parts provide 100% minimum current transfer ratio @ 10mA and 30V maximum output voltage. 4N35 is manufactured by onsemi with 5300Vrms isolation and 100mA forward current capability. 4N37 is manufactured by Vishay with 5000Vrms isolation, 50mA forward current capability, and RoHS3 compliance. 4N37 offers active product status and extended temperature range (-55°C to 100°C).

Q: Is the 6-DIP package size difference between CNW11AV1 and substitute parts critical?

A: Yes. CNW11AV1 uses 6-DIP (0.400", 10.16mm) while CNY171M, 4N35, and 4N37 use 6-DIP (0.300", 7.62mm). Both are through-hole packages with identical pin count and function, but PCB footprint and spacing differ. Verify PCB layout compatibility before substitution.

Q: Which substitute part is recommended for new production?

A: CNY171M or 4N37 are recommended for new production due to active product status. CNY171M provides RoHS3 compliance and onsemi support. 4N37 offers Vishay support, RoHS3 compliance, and extended operating temperature range. Both require design verification for current transfer ratio and output current specifications.

Q: Can these parts be used interchangeably in high-voltage isolation applications?

A: All substitute parts exceed the CNW11AV1 isolation voltage rating (4000Vrms), providing higher safety margin. However, output voltage and current ratings differ. 4N35 and 4N37 limit output voltage to 30V compared to CNW11AV1's 70V. Verify application requirements before substitution.