MOC81033SD Equivalent & Substitute Parts

Part Overview

The MOC81033SD 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 part operates across a temperature range of -55°C to 100°C with a maximum output current of 50mA per channel and 30V maximum output voltage.

Substiute Parts

MOC81033SD

onsemiIn Stock: 2121MOC81033SD Datasheet

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CNY17F3SR2VM

onsemiIn Stock: 1996CNY17F3SR2VM 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 MOC81033SD is determined by the following critical parameters:

• Single-channel transistor output optoisolator configuration
• 6-SMD surface mount package with gull wing leads
• Isolation voltage rating (minimum 4170Vrms acceptable for applications not requiring 5300Vrms)
• Maximum output voltage of 30V or higher
• Maximum output current of 50mA per channel
• Operating temperature range compatibility (-55°C to 100°C or subset)
• DC input type and transistor output type

The substitute parts CNY17F3SR2VM, MOC8103SM, and MOC8103SMT&R meet these core functional and mechanical requirements. CNY17F3SR2VM operates at 4170Vrms isolation, which is lower than the original but maintains compatibility with the same package and output specifications. MOC8103SM and MOC8103SMT&R are variants of the same base product family with identical mechanical packaging and electrical output characteristics.

Parameter Comparison

Engineering Selection Recommendations

CNY17F3SR2VM is an active product from onsemi with ROHS3 compliance. It provides the closest functional match to the MOC81033SD with identical output specifications (50mA, 30V maximum output voltage) and the same 6-SMD gull wing package. The isolation voltage is 4170Vrms compared to 5300Vrms in the original part. This substitute is suitable for applications where the lower isolation rating is acceptable. The operating temperature range is -40°C to 100°C, which covers the upper portion of the original specification.

MOC8103SM and MOC8103SMT&R are active products from Isocom Components 2004 LTD with ROHS3 compliance. Both variants share identical electrical and mechanical specifications, differing only in packaging format (tube versus tape & reel). These parts maintain the full -55°C to 100°C operating temperature range and 30V maximum output voltage. The isolation voltage specification of 7.5Vpk differs in units from the original but represents the same product family baseline. Both are suitable for direct replacement in applications requiring the original temperature range.

Frequently Asked Questions (FAQ)

Q: Can CNY17F3SR2VM replace MOC81033SD in all applications?

A: CNY17F3SR2VM is compatible with MOC81033SD for applications where 4170Vrms isolation voltage is sufficient. Both parts share identical output current (50mA), maximum output voltage (30V), package type (6-SMD gull wing), and saturation voltage (400mV). The primary difference is isolation voltage rating. Applications requiring 5300Vrms isolation must use MOC8103SM or MOC8103SMT&R, or verify that 4170Vrms meets system requirements.

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

A: MOC8103SM and MOC8103SMT&R are electrically and mechanically identical. The difference is packaging format: MOC8103SM is supplied in tube packaging, while MOC8103SMT&R is supplied in tape & reel format. Both maintain the same 6-SMD gull wing package configuration and are suitable for surface mount assembly.

Q: Does CNY17F3SR2VM meet the full temperature range of MOC81033SD?

A: CNY17F3SR2VM operates from -40°C to 100°C, which does not include the lower -55°C specification of the original MOC81033SD. For applications requiring operation at -55°C, use MOC8103SM or MOC8103SMT&R, which maintain the full -55°C to 100°C range.

Q: Are all substitute parts RoHS compliant?

A: CNY17F3SR2VM, MOC8103SM, and MOC8103SMT&R are all ROHS3 compliant. The original MOC81033SD does not specify RoHS status.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes, all substitute parts use the same 6-SMD gull wing package configuration and can be placed using identical PCB footprints. No layout modifications are required for mechanical compatibility.