MOC81023S Equivalent & Substitute Parts

Part Overview

The MOC81023S is a 6-SMD surface mount optoisolator with transistor output manufactured by onsemi. It provides 5300Vrms isolation voltage with a single channel configuration, designed for DC input applications requiring galvanic isolation. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. Substitute parts must maintain compatibility across isolation voltage, output characteristics, and thermal operating range to ensure functional equivalence in circuit applications.

Substiute Parts

MOC81023S

onsemiIn Stock: 949MOC81023S Datasheet

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CNY17F2SVM

Fairchild SemiconductorIn Stock: 4312CNY17F2SVM Datasheet

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MOC8102-X009

Vishay Semiconductor Opto DivisionIn Stock: 4860MOC8102-X009 Datasheet

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MOC8102-X017

Vishay Semiconductor Opto DivisionIn Stock: 4481MOC8102-X017 Datasheet

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MOC8102SM

Isocom Components 2004 LTDIn Stock: 815MOC8102SM Datasheet

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MOC8102SMT&R

Isocom Components 2004 LTDIn Stock: 866MOC8102SMT&R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the MOC81023S is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Voltage - Isolation: 5300Vrms (exact match required for high-voltage isolation applications)
• Number of Channels: 1 (single channel configuration)
• Output Type: Transistor (DC switching output)
• Package / Case: 6-SMD, Gull Wing (mechanical and electrical compatibility)
• Current Transfer Ratio range: 73% to 117% @ 10mA (optical coupling efficiency)
• Vce Saturation (Max): 400mV (output saturation voltage)
• Operating Temperature: -55°C ~ 100°C (thermal range compatibility)

Secondary Compatibility Parameters:

• Current - Output / Channel: 50mA (output current capability)
• Voltage - Output (Max): 30V (maximum collector voltage)
• Input Type: DC (input signal type)

Substitute parts are grouped into two categories: direct equivalents matching all primary criteria, and functional alternatives with acceptable parameter variations within engineering tolerances.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Preferred):

MOC8102-X009 and MOC8102-X017 from Vishay Semiconductor Opto Division are direct functional equivalents to the MOC81023S. Both parts maintain 5300Vrms isolation voltage, identical current transfer ratio specifications (73% to 117% @ 10mA), matching output voltage and current ratings, and equivalent thermal operating range (-55°C ~ 100°C). Both are ROHS3 compliant and REACH unaffected. These parts are currently in active production status with substantial inventory availability (4840 and 4400 units respectively). The primary difference is packaging format: MOC8102-X009 is supplied in Tube packaging, while MOC8102-X017 is also supplied in Tube packaging.

Functional Alternatives:

MOC8102SM and MOC8102SMT&R from Isocom Components 2004 LTD share identical mechanical packaging (6-SMD, Gull Wing) and output specifications but specify isolation voltage as 7.5Vpk rather than 5300Vrms. These parts are suitable only for applications where the lower isolation voltage specification is acceptable. Both are ROHS3 compliant and REACH unaffected, with active product status.

Lower Isolation Voltage Alternative:

CNY17F2SVM from Fairchild Semiconductor provides 4170Vrms isolation voltage, which is lower than the MOC81023S specification. This part is suitable only for applications with reduced isolation voltage requirements. It features higher maximum output voltage (70V versus 30V) and broader current transfer ratio range (63% to 125% @ 10mA). Operating temperature range is -40°C ~ 100°C, which is narrower at the low end. This part is in active production status with high inventory availability (4263 units).

Compliance and Certification:

All active substitute parts maintain REACH compliance and EAR99 ECCN classification consistent with the original MOC81023S. Vishay parts include ROHS3 compliance certification. Isocom parts include ROHS3 compliance certification. All parts maintain MSL 1 (Unlimited) moisture sensitivity level.

Frequently Asked Questions (FAQ)

Q: Can MOC8102-X009 or MOC8102-X017 be used as direct replacements for MOC81023S?

A: Yes. Both Vishay parts are direct functional equivalents. They maintain identical isolation voltage (5300Vrms), current transfer ratio specifications, output characteristics, and thermal operating range. Mechanical compatibility is confirmed through matching 6-SMD Gull Wing packaging. Both are currently in active production.

Q: What is the difference between MOC8102-X009 and MOC8102-X017?

A: Both parts are electrically and functionally identical. The designation difference reflects internal Vishay product line management. Both maintain 5300Vrms isolation, identical electrical specifications, and are supplied in Tube packaging. Selection between these parts can be based on supplier availability or internal part numbering requirements.

Q: Why is CNY17F2SVM listed as a substitute if it has lower isolation voltage?

A: CNY17F2SVM is included as a functional alternative for applications where 4170Vrms isolation voltage is sufficient. It is not a direct equivalent due to the reduced isolation specification. Use this part only if circuit design requirements permit lower isolation voltage.

Q: Are MOC8102SM and MOC8102SMT&R suitable replacements?

A: These Isocom parts share identical mechanical packaging and output specifications but specify isolation voltage as 7.5Vpk. They are suitable only for applications where this lower isolation voltage specification is acceptable. The primary difference between MOC8102SM and MOC8102SMT&R is packaging format: Tube versus Tape & Reel (TR).

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging is used for manual handling and lower-volume applications. Tape & Reel (TR) packaging is used for automated assembly processes and higher-volume production. Both formats contain identical components; the difference is in delivery and handling method. MOC8102-X009 and MOC8102-X017 are supplied in Tube format. MOC8102SMT&R is supplied in Tape & Reel format.

Q: Are all substitute parts RoHS compliant?

A: Vishay parts (MOC8102-X009, MOC8102-X017) and Isocom parts (MOC8102SM, MOC8102SMT&R) are ROHS3 compliant. CNY17F2SVM compliance status is not specified in available documentation. All parts are REACH unaffected.

Q: What is the operating temperature range difference between MOC81023S and CNY17F2SVM?

A: MOC81023S operates from -55°C to 100°C. CNY17F2SVM operates from -40°C to 100°C. The CNY17F2SVM has a narrower low-temperature specification. Applications requiring operation below -40°C must use MOC81023S or its direct equivalents (MOC8102-X009, MOC8102-X017).

Q: Can I use these parts interchangeably in existing designs?

A: Direct equivalents (MOC8102-X009, MOC8102-X017) can be used interchangeably with MOC81023S without circuit modification. Functional alternatives (MOC8102SM, MOC8102SMT&R, CNY17F2SVM) require verification that reduced isolation voltage specifications are acceptable for the intended application. All parts maintain identical 6-SMD Gull Wing mechanical compatibility.