MOC81053S Equivalent & Substitute Parts

Part Overview

The MOC81053S is an optoisolator with transistor output manufactured by onsemi, designed for high-voltage isolation applications requiring 5300Vrms isolation capability. This component features a single channel configuration in a 6-SMD surface mount package with a maximum output current of 50mA per channel and operates across an extended temperature range of -55°C to 100°C.

The MOC81053S is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this component.

Substiute Parts

MOC81053S

onsemiIn Stock: 717MOC81053S Datasheet

Current PartRFQ

CNY17F2SVM

Fairchild SemiconductorIn Stock: 4312CNY17F2SVM Datasheet

SimilarRFQ

MOC8105SM

Isocom Components 2004 LTDIn Stock: 1187MOC8105SM Datasheet

SimilarRFQ

MOC8105SMT&R

Isocom Components 2004 LTDIn Stock: 1099MOC8105SMT&R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MOC81053S is determined by the following critical parameters:

Primary Compatibility Criteria:

• Single channel configuration (Number of Channels = 1)
• Transistor output type
• 6-SMD surface mount package with gull wing leads
• Maximum output current of 50mA per channel
• Vce saturation maximum of 400mV
• Voltage - Output (Max) of 30V or greater

Secondary Compatibility Criteria:

• Operating temperature range encompassing or overlapping -55°C to 100°C
• Current transfer ratio performance within acceptable operational margins
• Input type: DC

The substitute parts identified below meet these core electrical and mechanical parameters. Voltage isolation ratings vary among substitutes; applications requiring the full 5300Vrms isolation of the original part must account for this specification difference.

Parameter Comparison

Engineering Selection Recommendations

CNY17F2SVM (Fairchild Semiconductor): This part is currently in active production status and shares the same 6-SMD gull wing package, single channel configuration, and 50mA output current rating. The isolation voltage is 4170Vrms, which is lower than the original MOC81053S specification of 5300Vrms. The maximum output voltage is 70V, exceeding the original 30V specification. Operating temperature range is -40°C to 100°C, which does not extend to the lower -55°C limit of the original part. This substitute is suitable for applications where the reduced isolation voltage and narrower temperature range are acceptable.

MOC8105SM (Isocom Components 2004 LTD): This part is in active production and available in tube packaging. It matches the original part in operating temperature range (-55°C to 100°C), output voltage maximum (30V), and output current (50mA). The isolation voltage specification is listed as 7.5Vpk, which differs significantly from the original 5300Vrms rating. This part carries RoHS3 compliance certification. Substitution is appropriate for applications where isolation voltage requirements differ from the original specification.

MOC8105SMT&R (Isocom Components 2004 LTD): This variant is identical to MOC8105SM in electrical specifications and performance characteristics, with the distinction of being supplied in tape and reel packaging format. It is in active production status with RoHS3 compliance. Selection between MOC8105SM and MOC8105SMT&R depends on packaging and supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can MOC81053S be directly replaced with CNY17F2SVM?

A: Direct replacement is possible from a mechanical and functional standpoint, as both components share the same 6-SMD gull wing package, single channel transistor output configuration, and 50mA output current rating. However, the CNY17F2SVM has a lower isolation voltage rating (4170Vrms versus 5300Vrms) and a narrower operating temperature range (-40°C to 100°C versus -55°C to 100°C). Applications requiring the full isolation voltage specification or operation below -40°C must evaluate whether these differences are acceptable.

Q: What is the primary difference between MOC8105SM and MOC8105SMT&R?

A: Both parts are electrically and functionally identical. The difference is in packaging format: MOC8105SM is supplied in tube packaging, while MOC8105SMT&R is supplied in tape and reel format. Selection depends on assembly line requirements and inventory management preferences.

Q: Are the Isocom MOC8105 variants suitable replacements for the onsemi MOC81053S?

A: The MOC8105 variants match the original part in operating temperature range, output voltage, output current, and saturation voltage. Both are in active production with RoHS3 compliance. The isolation voltage specification differs (7.5Vpk versus 5300Vrms), which must be evaluated against application requirements. Mechanical compatibility is confirmed through identical 6-SMD gull wing packaging.

Q: What compliance certifications are relevant for substitute part selection?

A: The MOC8105SM and MOC8105SMT&R carry RoHS3 compliance certification. The CNY17F2SVM does not list RoHS status in the provided specifications. All parts are classified as REACH Unaffected and carry ECCN EAR99 designation. Applications with specific compliance requirements should verify these certifications against design specifications.

Q: Why is the MOC81053S classified as obsolete?

A: The MOC81053S is no longer in active production by onsemi. Identifying substitute parts ensures continued availability for designs currently utilizing this component and supports production continuity for existing applications.