IL5 Optoisolator Transistor with Base - Equivalent & Substitute Parts

Part Overview

The IL5 is a 6-DIP optoisolator with transistor output and base connection, rated for 5300Vrms isolation voltage. Manufactured by Vishay Semiconductor Opto Division, this component is classified as obsolete. Due to its discontinued status, equivalent substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts maintain functional compatibility through matching electrical characteristics, package configuration, and isolation ratings.

Key Parameters

Parameter	IL5 Specification
Manufacturer	Vishay Semiconductor Opto Division
Product Status	Obsolete
Number of Channels	1
Voltage - Isolation	5300Vrms
Current Transfer Ratio (Min)	50% @ 10mA
Current Transfer Ratio (Max)	400% @ 10mA
Output Type	Transistor with Base
Voltage - Output (Max)	70V
Current - Output / Channel	50mA
Voltage - Forward (Vf) (Typ)	1.25V
Operating Temperature	-40°C ~ 100°C
Package / Case	6-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the IL5 are grouped by current transfer ratio (CTR) performance bands, as this parameter directly determines circuit behavior and load-driving capability. All qualified substitutes maintain the following critical parameters:

Package configuration: 6-DIP (0.300", 7.62mm) through-hole mounting
Output type: Transistor with base connection
Maximum output voltage: 70V
Maximum output current: 50mA or higher
Input type: DC
RoHS3 compliance and MSL-1 rating

Substitutes are organized into four CTR bands corresponding to the IL5's 50%-400% range:

Band 1 (40%-80% CTR): CNY17-1, CNY17-1X Band 2 (63%-125% CTR): CNY17-2, CNY17-2X Band 3 (100%-200% CTR): CNY17-3-000E, CNY17-3X Band 4 (160%-320% CTR): CNY17-4, CNY17-4X, CNY17-5

Isolation voltage varies between 5000Vrms and 5300Vrms across substitutes. Parts rated 5300Vrms (IL5, CNY17-1X, CNY17-2X, CNY17-3X, CNY17-4X, CNY17-5) provide direct electrical equivalence. Parts rated 5000Vrms (CNY17-1, CNY17-2, CNY17-3-000E, CNY17-4) are functionally compatible for applications not requiring the full 5300Vrms isolation margin.

Parameter Comparison

Part Number	Manufacturer	Status	Isolation (Vrms)	CTR Min @ 10mA	CTR Max @ 10mA	Output Current (mA)	Vce Sat (Max)	Temp Range	Inventory
IL5	Vishay	Obsolete	5300	50%	400%	50	250mV	-40 to 100°C	691
CNY17-1	Lite-On	Active	5000	40%	80%	150	300mV	-55 to 100°C	48700
CNY17-1X	Isocom	Active	5300	40%	80%	50	400mV	-55 to 100°C	1021
CNY17-2	Lite-On	Active	5000	63%	125%	150	300mV	-55 to 100°C	43100
CNY17-2X	Isocom	Active	5300	63%	125%	50	400mV	-55 to 100°C	702
CNY17-3-000E	Broadcom	Active	5000	100%	200%	150	300mV	-55 to 100°C	9859
CNY17-3X	Isocom	Active	5300	100%	200%	50	400mV	-55 to 100°C	1086
CNY17-4	Lite-On	Active	5000	160%	320%	150	300mV	-55 to 100°C	89800
CNY17-4X	Isocom	Active	5300	160%	320%	50	400mV	-55 to 100°C	5355
CNY17-5	Isocom	Active	5300	200%	400%	50	400mV	-55 to 100°C	1048

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance and MSL-1 rating, meeting current regulatory requirements. Selection criteria are based on current transfer ratio matching and isolation voltage requirements:

For 5300Vrms isolation requirement (direct electrical equivalence): CNY17-1X, CNY17-2X, CNY17-3X, CNY17-4X, and CNY17-5 maintain the IL5's isolation specification. CNY17-5 provides the closest CTR match (200%-400%) to the IL5's upper performance band.

For 5000Vrms isolation applications: CNY17-1, CNY17-2, CNY17-3-000E, and CNY17-4 are suitable where the reduced isolation margin is acceptable. CNY17-4 offers the highest CTR band (160%-320%) and largest inventory availability (89,800 units).

For output current requirements: Lite-On CNY17 series (CNY17-1, CNY17-2, CNY17-3-000E, CNY17-4) support 150mA output current, exceeding the IL5's 50mA rating. Isocom parts (CNY17-1X, CNY17-2X, CNY17-3X, CNY17-4X, CNY17-5) match the IL5's 50mA output current specification.

For extended temperature range: All active substitutes support -55°C to 100°C operation, exceeding the IL5's -40°C to 100°C range.

Frequently Asked Questions (FAQ)

Q: Can CNY17-1 replace IL5 directly? A: CNY17-1 is functionally compatible for circuits tolerating 5000Vrms isolation (versus IL5's 5300Vrms). The 40%-80% CTR band is lower than IL5's 50%-400% range, requiring circuit verification for adequate drive capability.

Q: What is the difference between CNY17-2 and CNY17-2X? A: Both provide 63%-125% CTR performance. CNY17-2 (Lite-On) is rated 5000Vrms with 150mA output current. CNY17-2X (Isocom) is rated 5300Vrms with 50mA output current. Selection depends on isolation voltage and current requirements.

Q: Is CNY17-5 the best substitute for IL5? A: CNY17-5 matches IL5's 200%-400% CTR upper band and 5300Vrms isolation specification. However, it is a transistor-only output (no base connection). Verify circuit compatibility with this output configuration before selection.

Q: Can I use CNY17-4 in place of IL5? A: CNY17-4 is compatible for applications accepting 5000Vrms isolation. Its 160%-320% CTR band overlaps IL5's range. The higher 150mA output current provides additional design margin.

Q: Are all substitutes through-hole 6-DIP packages? A: Yes. All listed substitutes use 6-DIP (0.300", 7.62mm) through-hole mounting, matching IL5's package configuration for direct PCB compatibility.

Q: What is the minimum inventory availability for production? A: CNY17-4 offers the highest stock (89,800 units). CNY17-1 provides 48,700 units. For lower-volume requirements, CNY17-1X, CNY17-2X, CNY17-3X, and CNY17-4X each maintain over 1,000 units in stock.

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