CNY17-3M Equivalent & Substitute Parts

Part Overview

The CNY17-3M is an optoisolator transistor with base output manufactured by Everlight Electronics Co Ltd. This component provides 5000Vrms isolation voltage in a 6-DIP through-hole package and is designed for DC input applications requiring galvanic isolation with transistor output capability. The part is Active status and RoHS3 compliant with unlimited moisture sensitivity level.

Substitute parts are necessary when the primary CNY17-3M is unavailable due to inventory constraints, supply chain disruptions, or when alternative manufacturers' equivalent specifications meet application requirements. Substitute selection is based on matching critical electrical parameters including isolation voltage, current transfer ratio, output voltage rating, and package compatibility.

Key Parameters

Parameter	CNY17-3M Value	Substitution Relevance
Voltage - Isolation	5000Vrms	Critical - Minimum isolation requirement
Number of Channels	1	Critical - Functional requirement
Current Transfer Ratio (Min)	100% @ 10mA	Critical - Output drive capability
Current Transfer Ratio (Max)	200% @ 10mA	Critical - Output drive capability
Output Type	Transistor with Base	Critical - Functional configuration
Voltage - Output (Max)	80V	Important - Output voltage rating
Vce Saturation (Max)	300mV	Important - Output saturation performance
Package / Case	6-DIP (0.400", 10.16mm)	Critical - Physical compatibility
Operating Temperature	-55°C ~ 110°C	Important - Environmental range
Input Type	DC	Critical - Input signal type
Mounting Type	Through Hole	Critical - PCB assembly method

Substitute Part Grouping Explanation

Substitution logic for the CNY17-3M is based on the following critical parameters:

Isolation Voltage: The CNY17-3M specifies 5000Vrms isolation. Substitute parts must meet or exceed this specification. Parts with 5300Vrms isolation (CNY17-1XG, CNY17-2XG, CNY17-3XG, CNY17-4XG, CNY17-5G, CNY17-5XG) provide higher isolation margin and are acceptable substitutes.

Current Transfer Ratio: The CNY17-3M operates at 100-200% CTR @ 10mA. Substitute parts are grouped by CTR performance:

Direct CTR match (100-200%): CNY17-3X006, CNY17-3XG
Lower CTR (40-80%): CNY17-1XG
Lower CTR (63-125%): CNY17-2-W00E, CNY17-2XG
Higher CTR (160-320%): CNY17-4X006, CNY17-4XG
Highest CTR (200-400%): CNY17-5G, CNY17-5XG

Output Type: The CNY17-3M features transistor with base output. All listed substitutes maintain this output configuration except CNY17-5G, which is transistor output without base.

Package Compatibility: The CNY17-3M uses 6-DIP (0.400", 10.16mm) package. Substitutes CNY17-1XG, CNY17-2XG, and CNY17-3XG use 6-DIP (0.300", 7.62mm) package, which differs in physical dimensions. All other substitutes use matching 6-DIP (0.400", 10.16mm) package.

Output Voltage Rating: The CNY17-3M specifies 80V maximum output voltage. Substitutes CNY17-2-W00E, CNY17-3X006, CNY17-4X006, CNY17-4XG, CNY17-5G, and CNY17-5XG specify 70V maximum output voltage, representing a 10V reduction in output voltage capability.

Operating Temperature: The CNY17-3M operates from -55°C to 110°C. Substitutes CNY17-1XG, CNY17-2-W00E, CNY17-2XG, CNY17-3XG, CNY17-4XG, CNY17-5G, and CNY17-5XG operate from -55°C to 100°C, representing a 10°C reduction in upper temperature limit.

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage	CTR Min @ 10mA	CTR Max @ 10mA	Output Type	Vout Max	Package	Temp Range	Vce Sat Max	Inventory
CNY17-3M	Everlight Electronics	5000Vrms	100%	200%	Transistor w/ Base	80V	6-DIP (0.400")	-55 to 110°C	300mV	4937
CNY17-1XG	Isocom Components	5300Vrms	40%	80%	Transistor w/ Base	70V	6-DIP (0.300")	-55 to 100°C	400mV	1057
CNY17-2-W00E	Broadcom Limited	5000Vrms	63%	125%	Transistor w/ Base	70V	6-DIP (0.400")	-55 to 100°C	300mV	4919
CNY17-2XG	Isocom Components	5300Vrms	63%	125%	Transistor w/ Base	70V	6-DIP (0.300")	-55 to 100°C	400mV	788
CNY17-3X006	Vishay Semiconductor	5000Vrms	100%	200%	Transistor w/ Base	70V	6-DIP (0.400")	-55 to 110°C	400mV	2328
CNY17-3XG	Isocom Components	5300Vrms	100%	200%	Transistor w/ Base	70V	6-DIP (0.300")	-55 to 100°C	400mV	762
CNY17-4X006	Vishay Semiconductor	5000Vrms	160%	320%	Transistor w/ Base	70V	6-DIP (0.400")	-55 to 110°C	400mV	730
CNY17-4XG	Isocom Components	5300Vrms	160%	320%	Transistor w/ Base	70V	6-DIP (0.400")	-55 to 100°C	400mV	750
CNY17-5G	Isocom Components	5300Vrms	200%	400%	Transistor	70V	6-DIP (0.400")	-55 to 100°C	400mV	921
CNY17-5XG	Isocom Components	5300Vrms	200%	400%	Transistor w/ Base	70V	6-DIP (0.400")	-55 to 100°C	400mV	1128

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

CNY17-3X006 (Vishay Semiconductor) and CNY17-3XG (Isocom Components) provide the closest electrical match to the CNY17-3M with identical CTR specifications (100-200% @ 10mA) and matching isolation voltage (5000Vrms and 5300Vrms respectively). Both are RoHS3 compliant with unlimited MSL rating. CNY17-3X006 maintains the full -55°C to 110°C operating temperature range of the CNY17-3M. CNY17-3XG operates to 100°C maximum. Both use 6-DIP package format; however, CNY17-3XG uses 0.300" pitch versus CNY17-3M's 0.400" pitch, requiring PCB layout verification.

Secondary Substitutes (Acceptable with Application Review):

CNY17-2-W00E (Broadcom Limited) matches the CNY17-3M package dimensions (6-DIP 0.400") and isolation voltage (5000Vrms). CTR specification is lower (63-125% @ 10mA) and maximum output voltage is reduced to 70V. Operating temperature range is -55°C to 100°C. This part is suitable for applications where lower CTR and reduced output voltage are acceptable.

CNY17-4X006 (Vishay Semiconductor) and CNY17-4XG (Isocom Components) provide higher CTR (160-320% @ 10mA) with matching isolation voltage. CNY17-4X006 maintains full temperature range (-55°C to 110°C). Both reduce maximum output voltage to 70V. These parts are suitable for applications requiring higher output drive capability.

CNY17-5XG (Isocom Components) provides the highest CTR (200-400% @ 10mA) with transistor with base output configuration. Operating temperature is limited to 100°C and output voltage to 70V. This part is suitable for high-drive applications within the reduced temperature range.

Not Recommended for Direct Substitution:

CNY17-1XG provides lower CTR (40-80% @ 10mA) and uses different package pitch (0.300" versus 0.400"), making it unsuitable as a direct replacement.

CNY17-2XG uses different package pitch (0.300" versus 0.400") and provides lower CTR (63-125% @ 10mA).

CNY17-5G lacks base output configuration (transistor output only), which differs from the CNY17-3M's transistor with base specification.

All substitute parts are RoHS3 compliant and carry unlimited MSL rating, matching the CNY17-3M compliance profile.

Frequently Asked Questions (FAQ)

Q: Can CNY17-3X006 directly replace CNY17-3M in all applications?

A: CNY17-3X006 provides matching CTR (100-200% @ 10mA) and isolation voltage (5000Vrms). The primary difference is maximum output voltage (70V versus 80V on CNY17-3M) and Vce saturation (400mV versus 300mV). Applications operating below 70V output and tolerating higher saturation voltage can use CNY17-3X006 directly. PCB layout remains compatible due to matching 6-DIP (0.400") package.

Q: What is the impact of different package pitch (0.300" versus 0.400")?

A: Package pitch refers to the center-to-center distance between DIP pins. CNY17-1XG, CNY17-2XG, and CNY17-3XG use 0.300" pitch while CNY17-3M uses 0.400" pitch. These parts cannot be used interchangeably on the same PCB without layout modification. Substitutes with matching 0.400" pitch (CNY17-2-W00E, CNY17-3X006, CNY17-4X006, CNY17-4XG, CNY17-5G, CNY17-5XG) are plug-compatible from a physical standpoint.

Q: How does Current Transfer Ratio affect substitution?

A: CTR determines the output current capability relative to input current. CNY17-3M specifies 100-200% CTR @ 10mA. Lower CTR parts (CNY17-1XG at 40-80%, CNY17-2-W00E at 63-125%) provide reduced output drive and require higher input current for equivalent output. Higher CTR parts (CNY17-4X006 at 160-320%, CNY17-5XG at 200-400%) provide increased output drive. Selection depends on circuit input current availability and output current requirements.

Q: Is CNY17-5XG suitable as a substitute despite higher CTR?

A: CNY17-5XG provides higher CTR (200-400% @ 10mA) than CNY17-3M (100-200%), which increases output drive capability. This is generally acceptable in applications where higher drive is not detrimental. However, CNY17-5XG operates to 100°C maximum versus CNY17-3M's 110°C, and output voltage is limited to 70V versus 80V. Applications requiring full temperature range or higher output voltage should not use CNY17-5XG.

Q: Why does CNY17-5G not appear as a recommended substitute?

A: CNY17-5G is configured as transistor output without base, while CNY17-3M is transistor with base output. The base connection provides additional circuit design flexibility. Applications specifically designed for transistor with base configuration cannot use CNY17-5G without circuit modification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (CNY17-1XG, CNY17-2-W00E, CNY17-2XG, CNY17-3X006, CNY17-3XG, CNY17-4X006, CNY17-4XG, CNY17-5G, CNY17-5XG) are RoHS3 compliant with unlimited MSL rating, matching the CNY17-3M compliance profile.

Q: What is the significance of isolation voltage differences (5000Vrms versus 5300Vrms)?

A: CNY17-3M specifies 5000Vrms isolation. Substitute parts from Isocom Components (CNY17-1XG, CNY17-2XG, CNY17-3XG, CNY17-4XG, CNY17-5G, CNY17-5XG) specify 5300Vrms isolation, providing 300Vrms additional isolation margin. This higher specification is acceptable and provides improved isolation performance. Broadcom CNY17-2-W00E and Vishay parts (CNY17-3X006, CNY17-4X006) match the 5000Vrms specification exactly.

Q: How should operating temperature range differences be evaluated?

A: CNY17-3M operates from -55°C to 110°C. Most substitute parts operate to 100°C maximum, representing a 10°C reduction in upper temperature limit. Applications operating above 100°C require CNY17-3X006 or CNY17-4X006 (both -55°C to 110°C). For applications within -55°C to 100°C range, all substitutes are acceptable from a temperature standpoint.

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