CNY17F2 Optoisolator Equivalent & Substitute Parts

Part Overview

The CNY17F2 is a single-channel optoisolator with transistor output manufactured by onsemi, rated for 5300Vrms isolation voltage in a 6-DIP through-hole package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The CNY17F2 serves applications requiring galvanic isolation in low-speed switching and signal transmission circuits with moderate current requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	CNY17F2
Manufacturer	onsemi
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5300Vrms
Current Transfer Ratio (Min)	63% @ 10mA
Current Transfer Ratio (Max)	125% @ 10mA
Output Type	Transistor
Voltage - Output (Max)	70V
Current - Output / Channel	50mA
Vce Saturation (Max)	300mV
Operating Temperature	-55°C ~ 100°C
Package / Case	6-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the CNY17F2 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Single channel configuration (1 Channel)
Isolation voltage rating (5000Vrms minimum; 5300Vrms preferred)
Transistor output type
6-DIP through-hole package (0.300", 7.62mm)
DC input type
Operating temperature range overlap (-55°C minimum)

Performance Parameters Affecting Substitution:

Current Transfer Ratio (CTR) range: CNY17F2 operates at 63-125% @ 10mA, establishing a high-performance baseline
Maximum output voltage: 70V
Output current capability: 50mA minimum
Vce saturation: 300mV maximum

Substitute parts are grouped into two categories based on CTR performance: high-performance devices matching the CNY17F2 CTR specification (63-125%), and standard-performance devices with lower CTR (40-80%). Selection depends on circuit requirements for current transfer efficiency.

Parameter Comparison

Parameter	CNY17F2 (onsemi)	CNY17F-1 (Fairchild)	CNY17F-1X (Isocom)	CNY17F-1X001 (Vishay)	CNY17F-2 (Lite-On)	CNY17F-2X (Isocom)	CNY17F-2X001 (Vishay)	CNY17F-3 (Lite-On)
Manufacturer	onsemi	Fairchild Semiconductor	Isocom Components	Vishay Semiconductor Opto	Lite-On Inc.	Isocom Components	Vishay Semiconductor Opto	Lite-On Inc.
Voltage - Isolation	5300Vrms	5000Vrms	5300Vrms	5000Vrms	5000Vrms	5300Vrms	5000Vrms	5000Vrms
CTR Min @ 10mA	63%	40%	40%	40%	63%	63%	63%	100%
CTR Max @ 10mA	125%	80%	80%	80%	125%	125%	125%	200%
Turn On / Turn Off Time (Typ)	2µs, 3µs	10µs, 9µs	3µs, 2.3µs	3µs, 2.3µs	—	3µs, 2.3µs	3µs, 2.3µs	—
Voltage - Output (Max)	70V	80V	70V	70V	70V	70V	70V	70V
Current - Output / Channel	50mA	—	50mA	50mA	150mA	50mA	50mA	150mA
Vce Saturation (Max)	300mV	300mV	400mV	400mV	300mV	400mV	400mV	300mV
Operating Temperature	-55°C ~ 100°C	-55°C ~ 110°C	-55°C ~ 100°C	-55°C ~ 110°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 110°C	-55°C ~ 100°C
Package / Case	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)
Product Status	Obsolete	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	Not applicable	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalents (Highest Compatibility):

CNY17F-2 (Lite-On) and CNY17F-2X001 (Vishay) provide the closest electrical match to CNY17F2, with identical CTR specifications (63-125% @ 10mA), matching Vce saturation (300mV), and equivalent output voltage rating (70V). Both are active products with ROHS3 compliance, eliminating obsolescence risk. CNY17F-2X (Isocom) matches the 5300Vrms isolation rating and CTR performance, also with active status and ROHS3 compliance.

Secondary Equivalents (Acceptable with Circuit Verification):

CNY17F-1X (Isocom) and CNY17F-1X001 (Vishay) maintain 5300Vrms and 5000Vrms isolation respectively with active product status. These devices feature lower CTR (40-80% @ 10mA) and higher Vce saturation (400mV), requiring circuit-level verification that reduced current transfer efficiency does not compromise application performance. Both offer ROHS3 compliance.

Not Recommended:

CNY17F-1 (Fairchild) is obsolete, eliminating long-term procurement viability despite electrical compatibility parameters.

CNY17F-3 (Lite-On) exhibits elevated CTR (100-200% @ 10mA) and increased output current capability (150mA), introducing performance characteristics beyond the CNY17F2 specification envelope. Use only when higher current transfer efficiency is required.

Frequently Asked Questions (FAQ)

Q: Can CNY17F-2 directly replace CNY17F2 in existing designs?

A: Yes. CNY17F-2 (Lite-On) matches the CNY17F2 across all critical parameters: 63-125% CTR @ 10mA, 300mV Vce saturation, 70V maximum output voltage, 50mA output current, and 6-DIP package. Both operate across -55°C to 100°C. The primary advantage is active product status with ROHS3 compliance, eliminating obsolescence concerns.

Q: What is the difference between 5000Vrms and 5300Vrms isolation ratings?

A: Both ratings provide galvanic isolation suitable for high-voltage applications. The 5300Vrms rating (CNY17F2, CNY17F-1X, CNY17F-2X) offers marginally higher isolation margin. Devices rated 5000Vrms (CNY17F-1, CNY17F-1X001, CNY17F-2, CNY17F-2X001, CNY17F-3) remain compatible for applications designed to the lower specification. Selection depends on circuit isolation requirements.

Q: How does Current Transfer Ratio affect substitution?

A: CTR determines the output current magnitude relative to input current. CNY17F2 specifies 63-125% CTR @ 10mA. Substitutes with lower CTR (40-80%) produce proportionally less output current for the same input, potentially requiring input current adjustment. Substitutes with higher CTR (100-200%) produce greater output current, suitable for applications requiring enhanced drive capability. Circuit design must accommodate the selected device's CTR range.

Q: Are all substitute parts RoHS compliant?

A: Active substitute parts (CNY17F-1X, CNY17F-1X001, CNY17F-2, CNY17F-2X, CNY17F-2X001, CNY17F-3) are ROHS3 compliant. The obsolete CNY17F-1 (Fairchild) lists RoHS status as not applicable. The original CNY17F2 does not specify RoHS status. For new designs, select active ROHS3-compliant substitutes.

Q: Can CNY17F-3 replace CNY17F2?

A: CNY17F-3 is electrically compatible in package and isolation voltage but exhibits higher CTR (100-200% @ 10mA) and greater output current capability (150mA vs. 50mA). Use CNY17F-3 only when circuit design requires enhanced current transfer efficiency or higher output drive current. Standard applications should use CNY17F-2 or CNY17F-2X for specification alignment.

Q: What packaging considerations apply to 6-DIP substitution?

A: All substitute parts use identical 6-DIP (0.300", 7.62mm) through-hole packaging, ensuring direct PCB footprint compatibility. No layout modifications are required for package substitution. Verify lead spacing and hole diameter specifications match your PCB design before procurement.

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