MOC8103S Equivalent & Substitute Parts

Part Overview

The MOC8103S is an optoisolator with transistor output manufactured by onsemi, featuring 5300Vrms isolation voltage and single-channel configuration in 6-SMD surface mount packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The MOC8103S serves applications requiring galvanic isolation with transistor-based output switching capabilities.

Substiute Parts

MOC8103S

onsemiIn Stock: 1144MOC8103S Datasheet

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CNY17F3SM

onsemiIn Stock: 17828CNY17F3SM Datasheet

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MOC8103SM

Isocom Components 2004 LTDIn Stock: 1131MOC8103SM Datasheet

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MOC8103SMT&R

Isocom Components 2004 LTDIn Stock: 956MOC8103SMT&R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the MOC8103S is determined by the following critical parameters:

• Number of Channels: Must be 1 channel
• Output Type: Must be transistor output
• Mounting Type: Must be surface mount
• Package / Case: Must be 6-SMD, Gull Wing
• Current - Output / Channel: Must support 50mA
• Voltage - Output (Max): Must support minimum 30V
• Vce Saturation (Max): Must not exceed 400mV
• Operating Temperature Range: Must encompass or match -55°C ~ 100°C
• Moisture Sensitivity Level: Must be MSL 1 (Unlimited)

The substitute parts listed below meet these core electrical and mechanical requirements, enabling direct functional replacement in applications designed for the MOC8103S.

Parameter Comparison

Engineering Selection Recommendations

CNY17F3SM (onsemi): This substitute maintains active product status with onsemi manufacturing. It meets all core mechanical and electrical requirements including 50mA output current, 400mV maximum Vce saturation, and MSL 1 rating. The isolation voltage of 4170Vrms is lower than the MOC8103S at 5300Vrms; applications requiring the higher isolation specification should account for this difference. The operating temperature range of -40°C ~ 100°C is narrower than the original part's -55°C ~ 100°C specification.

MOC8103SM (Isocom Components 2004 LTD): This substitute is manufactured by Isocom under the MOC8103 series designation and maintains active product status. It provides identical mechanical packaging (6-SMD, Gull Wing) and matches critical output specifications including 30V maximum output voltage, 50mA output current, and 400mV Vce saturation. The part carries ROHS3 compliance certification. The isolation voltage specification differs significantly (7.5Vpk versus 5300Vrms); applications must account for this reduced isolation rating.

MOC8103SMT&R (Isocom Components 2004 LTD): This variant is identical to MOC8103SM in electrical and mechanical specifications, with the distinction of tape and reel packaging format. It maintains active product status, ROHS3 compliance, and all equivalent electrical parameters. Selection between MOC8103SM and MOC8103SMT&R depends on procurement and assembly requirements.

All three substitute parts are RoHS compliant and carry REACH Unaffected status, meeting modern regulatory requirements for component selection.

Frequently Asked Questions (FAQ)

Q: Can CNY17F3SM replace MOC8103S in all applications?

A: CNY17F3SM meets the core mechanical and electrical requirements for transistor output optoisolators in 6-SMD packaging. However, the isolation voltage differs: CNY17F3SM provides 4170Vrms compared to MOC8103S at 5300Vrms. Applications requiring the higher isolation specification must evaluate whether the reduced isolation voltage is acceptable for their circuit design. The operating temperature range is also narrower (-40°C ~ 100°C versus -55°C ~ 100°C).

Q: What is the difference between MOC8103SM and MOC8103SMT&R?

A: MOC8103SM and MOC8103SMT&R are electrically and mechanically identical. The primary difference is packaging format: MOC8103SM is supplied in tube packaging, while MOC8103SMT&R is supplied in tape and reel format. Selection depends on assembly line requirements and procurement preferences.

Q: Are all substitute parts RoHS compliant?

A: Yes. CNY17F3SM carries RoHS3 compliance status. MOC8103SM and MOC8103SMT&R both carry RoHS3 compliance certification. All substitute parts meet modern regulatory requirements.

Q: What are the key differences in isolation voltage between the substitute parts?

A: The MOC8103S provides 5300Vrms isolation. CNY17F3SM provides 4170Vrms isolation. MOC8103SM and MOC8103SMT&R provide 7.5Vpk isolation. Applications must evaluate isolation voltage requirements against these specifications to determine suitability.

Q: Do all substitute parts support the same output current?

A: Yes. All substitute parts support 50mA output current per channel, matching the MOC8103S specification.

Q: What is the Moisture Sensitivity Level (MSL) for these parts?

A: All parts, including the MOC8103S and all three substitute options, carry MSL 1 (Unlimited) rating, indicating unlimited shelf life under standard storage conditions.