MOC8107 Equivalent & Substitute Parts

Part Overview

The MOC8107 is an 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 new designs and ongoing production requirements. The MOC8107 provides single-channel DC input optoisolation with 50mA output current capability and is suitable for applications requiring high-voltage isolation in industrial and power management circuits.

Key Parameters

Parameter	MOC8107 Specification
Manufacturer	onsemi
Product Status	Obsolete
Number of Channels	1
Voltage - Isolation	5300Vrms
Current Transfer Ratio (Min)	100% @ 10mA
Current Transfer Ratio (Max)	300% @ 10mA
Output Type	Transistor
Voltage - Output (Max)	70V
Current - Output / Channel	50mA
Package / Case	6-DIP (0.300", 7.62mm)
Operating Temperature	-55°C ~ 100°C
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitute parts for the MOC8107 are selected based on the following critical parameters that determine functional compatibility:

Isolation Voltage: Minimum 5000Vrms to maintain equivalent or superior isolation performance
Number of Channels: Must be 1 channel
Output Type: Transistor or Transistor with Base output
Package / Case: 6-DIP (0.300", 7.62mm) for direct PCB compatibility
Mounting Type: Through Hole
Input Type: DC
Operating Temperature Range: Must encompass or match -55°C ~ 100°C
Output Voltage & Current: Maximum output voltage 70V; output current capability of 50mA or greater

The three substitute parts listed below meet these core compatibility criteria while offering active product status and improved availability compared to the obsolete MOC8107.

Parameter Comparison

Parameter	MOC8107 (onsemi)	CNY17F3M (onsemi)	CNY17-3-000E (Broadcom)	CNY17F-3 (Lite-On)
Product Status	Obsolete	Active	Active	Active
Number of Channels	1	1	1	1
Voltage - Isolation	5300Vrms	4170Vrms	5000Vrms	5000Vrms
Current Transfer Ratio (Min)	100% @ 10mA	100% @ 10mA	100% @ 10mA	100% @ 10mA
Current Transfer Ratio (Max)	300% @ 10mA	200% @ 10mA	200% @ 10mA	200% @ 10mA
Output Type	Transistor	Transistor	Transistor with Base	Transistor
Voltage - Output (Max)	70V	70V	70V	70V
Current - Output / Channel	50mA	50mA	150mA	150mA
Vce Saturation (Max)	400mV	400mV	300mV	300mV
Operating Temperature	-55°C ~ 100°C	-40°C ~ 100°C	-55°C ~ 100°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)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

CNY17-3-000E (Broadcom Limited) and CNY17F-3 (Lite-On Inc.) are the primary substitutes for the MOC8107. Both parts maintain the 5000Vrms isolation voltage specification, matching the original design intent, and support the full -55°C ~ 100°C operating temperature range. Both are ROHS3 compliant and carry active product status with established supply chains. The CNY17-3-000E offers transistor-with-base output and 150mA output current, providing enhanced design flexibility. The CNY17F-3 delivers equivalent transistor output with 150mA capability and lower Vce saturation (300mV vs. 400mV).

CNY17F3M (onsemi) is a secondary substitute option from the original manufacturer. This part operates at 4170Vrms isolation voltage, which is below the MOC8107 specification but remains suitable for applications not requiring the full 5300Vrms isolation margin. The CNY17F3M has a reduced operating temperature range (-40°C ~ 100°C) and should be evaluated against specific application requirements. This part is ROHS3 compliant and maintains onsemi supply continuity.

All three substitutes are available in the same 6-DIP through-hole package, enabling direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the CNY17F3M replace the MOC8107 in all applications?

A: The CNY17F3M operates at 4170Vrms isolation voltage, which is 1130Vrms lower than the MOC8107 specification. Applications requiring the full 5300Vrms isolation margin must use CNY17-3-000E or CNY17F-3. The CNY17F3M is suitable for designs with lower isolation voltage requirements and operates within a narrower temperature range (-40°C ~ 100°C vs. -55°C ~ 100°C).

Q: Are all substitute parts pin-compatible with the MOC8107?

A: All substitute parts use the 6-DIP (0.300", 7.62mm) package and through-hole mounting, ensuring mechanical and PCB footprint compatibility. However, the CNY17-3-000E features transistor-with-base output, which may differ in pin function from the standard transistor output of the MOC8107 and other substitutes. Pin-level compatibility must be verified against specific application circuit requirements.

Q: What is the difference in current transfer ratio between the MOC8107 and substitutes?

A: The MOC8107 specifies a maximum current transfer ratio of 300% @ 10mA, while all three substitutes specify 200% @ 10mA. This difference affects input current requirements for achieving target output current levels. Applications designed for the MOC8107's higher CTR may require circuit adjustments when using substitute parts.

Q: Which substitute offers the best performance upgrade?

A: CNY17-3-000E and CNY17F-3 both provide 150mA output current capability compared to the MOC8107's 50mA, and both maintain 5000Vrms isolation voltage. The CNY17-3-000E offers lower Vce saturation (300mV) and transistor-with-base output for enhanced switching control. The CNY17F-3 provides equivalent performance with standard transistor output. Both are ROHS3 compliant with active product status.

Q: Are there compliance or certification differences between substitutes?

A: All three substitutes are ROHS3 compliant and REACH unaffected. The CNY17F3M and CNY17-3-000E carry MSL 1 (Unlimited) moisture sensitivity ratings. All parts share the same ECCN (EAR99) and HTSUS (8541.49.8000) classifications as the MOC8107.

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