CNY17-3 Optoisolator Equivalent & Substitute Parts

Part Overview

The CNY17-3 is a single-channel optoisolator transistor with base output, rated for 5000Vrms isolation voltage. Manufactured by Vishay Semiconductor Opto Division, this component features a 6-DIP through-hole package and is classified as "Not For New Designs." Due to this product status, equivalent and substitute parts from active manufacturers are necessary for ongoing production and new design implementations. Substitute parts maintain functional compatibility within the specified electrical and mechanical parameters.

Key Parameters

Parameter	Value
Isolation Voltage	5000Vrms
Number of Channels	1
Output Type	Transistor with Base
Maximum Output Voltage	70V
Maximum Output Current per Channel	50mA
Input Type	DC
Package Type	6-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Operating Temperature Range	-55°C to 110°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for CNY17-3 are grouped based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

Single-channel configuration
5000Vrms isolation voltage
Transistor with base output type
70V maximum output voltage
DC input type
6-DIP through-hole package
ROHS3 compliance

Substitution Categories:

Category 1: Parametric Equivalents (Full Electrical Match) Parts CNY117-3 and CNY17-3X001 provide complete electrical parameter alignment with the original CNY17-3, including current transfer ratio (100–200% @ 10mA), timing characteristics (3µs/2.3µs turn-on/off, 2µs rise/fall), and saturation voltage (400mV maximum).

Category 2: MFR Recommended Alternatives (Reduced Current Transfer Ratio) Parts CNY17-1, CNY17-1-000E, CNY17-1-060E, and CNY17-1-W00E from Lite-On Inc. and Broadcom Limited operate at lower current transfer ratios (40–80% @ 10mA) but maintain 5000Vrms isolation, 70V output voltage, and through-hole packaging. These parts support higher output current (150mA per channel) and lower saturation voltage (300mV).

Category 3: MFR Recommended (Quality Technologies) CNY17-3 from Quality Technologies provides active product status with reduced current transfer ratio specification (100% @ 10mA maximum) and operates in Box packaging format.

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage	CTR Min @ 10mA	CTR Max @ 10mA	Output Current/Channel	Vce Sat (Max)	Operating Temp Range	Product Status
CNY17-3	Vishay Semiconductor Opto Division	5000Vrms	100%	200%	50mA	400mV	-55°C to 110°C	Not For New Designs
CNY117-3	Vishay Semiconductor Opto Division	5000Vrms	100%	200%	50mA	400mV	-55°C to 110°C	Active
CNY17-3X001	Vishay Semiconductor Opto Division	5000Vrms	100%	200%	50mA	400mV	-55°C to 110°C	Active
CNY17-3 (Quality Technologies)	Quality Technologies	Not specified	Not specified	100%	Not specified	Not specified	Not specified	Active
CNY17-1	Lite-On Inc.	5000Vrms	40%	80%	150mA	300mV	-55°C to 100°C	Active
CNY17-1-000E	Broadcom Limited	5000Vrms	40%	80%	150mA	300mV	-55°C to 100°C	Active
CNY17-1-060E	Broadcom Limited	5000Vrms	40%	80%	150mA	300mV	-55°C to 100°C	Active
CNY17-1-W00E	Broadcom Limited	5000Vrms	40%	80%	150mA	300mV	-55°C to 100°C	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): CNY117-3 and CNY17-3X001 from Vishay Semiconductor Opto Division are parametric equivalents with active product status. Both maintain 100–200% current transfer ratio, 400mV saturation voltage, and -55°C to 110°C operating range. These parts require no circuit redesign and provide identical electrical behavior.

For Alternative Designs (Modified Current Transfer Ratio): CNY17-1 variants from Lite-On Inc. and Broadcom Limited (CNY17-1-000E, CNY17-1-060E, CNY17-1-W00E) operate with 40–80% current transfer ratio and support higher output current (150mA). These parts are suitable when circuit design accommodates lower current transfer ratio and reduced maximum operating temperature (-55°C to 100°C). All variants maintain ROHS3 compliance and 5000Vrms isolation.

For Active Production (Reduced Specification): CNY17-3 from Quality Technologies provides active product status with Box packaging. This option is available when specification reduction to 100% maximum current transfer ratio is acceptable.

All substitute parts maintain 6-DIP through-hole package compatibility, ROHS3 compliance, and 5000Vrms isolation voltage required for functional substitution.

Frequently Asked Questions (FAQ)

Q: Can CNY17-1 variants directly replace CNY17-3 in existing circuits? A: CNY17-1 variants operate with lower current transfer ratio (40–80% versus 100–200%) and reduced maximum operating temperature (100°C versus 110°C). Direct replacement requires circuit analysis to confirm adequate drive current and thermal margin. Output current capability is higher (150mA versus 50mA), which does not restrict compatibility.

Q: What is the difference between CNY117-3 and CNY17-3X001? A: Both parts are parametric equivalents with identical electrical specifications: 100–200% current transfer ratio, 5000Vrms isolation, 400mV saturation voltage, and -55°C to 110°C operating range. CNY117-3 has 12,780 pcs inventory; CNY17-3X001 has 2,250 pcs inventory. Selection depends on availability and supply chain requirements.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the original CNY17-3 environmental certification.

Q: Does package size vary among substitute parts? A: CNY17-1-W00E uses 6-DIP (0.400", 10.16mm) package, while all other parts use 6-DIP (0.300", 7.62mm). Verify PCB footprint compatibility before selection. All parts are through-hole mounted.

Q: Why is CNY17-3 marked "Not For New Designs"? A: This status indicates the original part is obsolete or transitioning out of production. Parametric equivalents CNY117-3 and CNY17-3X001 with active status are recommended for new designs requiring identical electrical performance.

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