CNW83S Equivalent & Substitute Parts

Part Overview

The CNW83S is an optoisolator transistor with base output manufactured by onsemi, designed for high-voltage isolation applications. This component features a single channel with 5900Vrms isolation voltage and transistor output configuration in a 6-SMD surface mount package. The CNW83S is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity.

Substiute Parts

CNW83S

onsemiIn Stock: 865CNW83S Datasheet

Current PartRFQ

CNY171SM

Fairchild SemiconductorIn Stock: 2598CNY171SM Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The CNY171SM qualifies as a functional substitute for the CNW83S based on the following alignment criteria:

Matching Parameters:

• Single channel optoisolator configuration
• Transistor with base output type
• 6-SMD, Gull Wing surface mount package
• Vce Saturation (Max) of 400mV
• DC input type
• Same ECCN and HTSUS classifications

Substitution Logic: The CNY171SM maintains electrical compatibility through equivalent output stage architecture and package form factor. Both components feature transistor output with base connection, enabling direct functional replacement in isolation circuits. The 6-SMD gull wing package ensures mechanical and thermal compatibility on existing PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

Active Product Availability: The CNY171SM is classified as Active, ensuring continued manufacturing support and supply chain availability. The CNW83S is Obsolete, making the CNY171SM the appropriate selection for new designs and production continuity.

Compliance Considerations: The CNW83S is RoHS non-compliant. The CNY171SM compliance status should be verified against your specific regulatory requirements before implementation.

Application Suitability: The CNY171SM supports higher maximum output voltage (70V vs. 50V) and provides specified operating temperature range (-40°C ~ 100°C), offering broader operational flexibility. However, the CNY171SM has lower maximum output current (50mA vs. 100mA) and reduced isolation voltage (4170Vrms vs. 5900Vrms). Circuit designs must account for these parameter differences to ensure functional equivalence in the target application.

Frequently Asked Questions (FAQ)

Q: Can the CNY171SM directly replace the CNW83S without circuit modification?

A: Direct pin-compatible replacement is possible due to identical 6-SMD gull wing package configuration. However, circuit validation is required to confirm that the CNY171SM's lower isolation voltage (4170Vrms vs. 5900Vrms) and reduced output current rating (50mA vs. 100mA) meet application requirements.

Q: What are the key electrical differences between these parts?

A: The CNY171SM provides significantly higher current transfer ratio (40-80% vs. 0.4%), specified switching times (2µs/3µs), and defined operating temperature range. The CNW83S offers higher isolation voltage and output current capacity. Application requirements determine which characteristics are critical.

Q: Are both parts suitable for high-voltage isolation applications?

A: Both components feature high-voltage isolation in the 4000+ Vrms range. The CNW83S provides higher isolation (5900Vrms), while the CNY171SM (4170Vrms) remains suitable for most industrial isolation requirements. Specific application voltage levels must be evaluated against each part's isolation rating.

Q: What is the impact of the CNY171SM's lower output current rating?

A: The CNY171SM maximum output current is 50mA compared to the CNW83S at 100mA. Applications requiring output currents exceeding 50mA must use the CNW83S or implement external current amplification with the CNY171SM.

Q: Are there packaging or mounting differences?

A: Both components use identical 6-SMD gull wing surface mount packages, ensuring mechanical and thermal compatibility on existing PCB layouts without redesign.