CNY17F-2 Optoisolator Equivalent & Substitute Parts

Part Overview

The CNY17F-2 is an optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component provides galvanic isolation up to 5000Vrms with a single channel configuration in a 6-DIP through-hole package. The device is currently in active production status with 26300 units in stock.

Substitute parts are identified when equivalent functional performance can be achieved within the allowed electrical and mechanical parameters for optoisolator applications. Substitution becomes necessary due to supply constraints, inventory availability, or specific application requirements that fall within the compatible parameter ranges.

Substiute Parts

CNY17F-2

Everlight Electronics Co LtdIn Stock: 26341CNY17F-2 Datasheet

Current PartRFQ

CNY17F4VM

onsemiIn Stock: 1091CNY17F4VM Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CNY17F-2 are identified based on the following critical parameters that define functional equivalence in optoisolator applications:

Package Compatibility: Both the main part and substitute must use 6-DIP through-hole mounting to ensure direct PCB compatibility without layout modifications.

Isolation Voltage: The CNY17F-2 specifies 5000Vrms isolation. Substitute parts with lower isolation voltage ratings (such as 4170Vrms) remain functionally valid for applications where the required isolation voltage does not exceed the substitute's rating.

Output Configuration: Single-channel transistor output is required for direct functional replacement.

Input Type: DC input operation must be maintained.

Compliance Standards: RoHS3 compliance is required for environmental and regulatory compatibility.

The CNY17F4VM from onsemi meets these substitution criteria despite variations in current transfer ratio ranges, switching times, and maximum output voltage specifications.

Parameter Comparison

Engineering Selection Recommendations

CNY17F-2 Selection Criteria:

Use the CNY17F-2 when applications require the full 5000Vrms isolation voltage specification, extended operating temperature range from -55°C to 110°C, or when the lower current transfer ratio range (63% minimum) is specifically required by circuit design parameters.

CNY17F4VM Selection Criteria:

The CNY17F4VM from onsemi is suitable for applications where the 4170Vrms isolation voltage meets system requirements and operating temperatures remain within -40°C to 100°C. This substitute offers faster switching characteristics (2µs turn-on, 3µs turn-off versus 10µs and 9µs respectively) and higher current transfer ratio performance (160% to 320% versus 63% to 125%).

Compliance Verification:

Both parts maintain ROHS3 compliance and EAR99 export classification. The CNY17F4VM carries REACH Unaffected status, while the CNY17F-2 specifies Moisture Sensitivity Level 1 (Unlimited).

Package and Mounting:

Both components use identical 6-DIP through-hole packaging, enabling direct PCB footprint compatibility without layout redesign.

Frequently Asked Questions (FAQ)

Q: Can CNY17F4VM directly replace CNY17F-2 in all applications?

A: Direct replacement is valid only when the application isolation voltage requirement does not exceed 4170Vrms and operating temperatures remain within -40°C to 100°C. The CNY17F-2 provides higher isolation voltage and extended temperature range.

Q: What is the significance of the different Current Transfer Ratio ranges?

A: Current Transfer Ratio (CTR) determines the output current relative to input current. The CNY17F4VM has a higher CTR range (160-320%) compared to CNY17F-2 (63-125%), resulting in different circuit biasing requirements. Applications designed for the lower CTR of CNY17F-2 may require input current adjustment if substituting with CNY17F4VM.

Q: Are the switching time differences critical for substitution?

A: The CNY17F4VM exhibits significantly faster switching times (2µs turn-on, 3µs turn-off) compared to CNY17F-2 (10µs turn-on, 9µs turn-off). Applications with timing-critical requirements must account for these differences in circuit design.

Q: Do both parts use the same PCB footprint?

A: Yes. Both CNY17F-2 and CNY17F4VM use 6-DIP (0.300", 7.62mm) through-hole packaging, providing identical PCB footprint compatibility.

Q: What is the maximum output voltage difference impact?

A: CNY17F-2 supports 80V maximum output voltage while CNY17F4VM supports 70V. Applications requiring output voltages between 70V and 80V cannot use CNY17F4VM as a substitute.

Q: How does the Vce Saturation difference affect circuit performance?

A: CNY17F-2 has 300mV maximum saturation voltage versus 400mV for CNY17F4VM. Higher saturation voltage in the substitute results in greater voltage drop across the output transistor, affecting power dissipation and circuit efficiency.

Q: Are there temperature-related substitution restrictions?

A: Yes. CNY17F-2 operates from -55°C to 110°C while CNY17F4VM operates from -40°C to 100°C. Applications requiring operation below -40°C or above 100°C must use CNY17F-2.