MOC81053SD Equivalent & Substitute Parts

Part Overview

The MOC81053SD is a single-channel optoisolator with transistor output manufactured by onsemi, designed for high-voltage isolation applications requiring 5300Vrms isolation rating. This component features a 6-SMD surface mount package with a maximum output voltage of 30V and 50mA output current capability. The product is currently obsolete, making equivalent substitute parts necessary for ongoing design support and component procurement in legacy systems or when stock depletion occurs.

Substiute Parts

MOC81053SD

onsemiIn Stock: 1010MOC81053SD Datasheet

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CNY17F2SR2VM

onsemiIn Stock: 3782CNY17F2SR2VM Datasheet

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MOC8105SM

Isocom Components 2004 LTDIn Stock: 1187MOC8105SM Datasheet

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MOC8105SMT&R

Isocom Components 2004 LTDIn Stock: 1099MOC8105SMT&R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MOC81053SD 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 voltage capability ≥ 30V
• Output current capability ≥ 50mA per channel
• Vce saturation ≤ 400mV
• Operating temperature range encompassing -55°C to 100°C or compatible subset

Isolation Voltage Consideration: The MOC81053SD specifies 5300Vrms isolation. Substitute parts with lower isolation ratings (such as 4170Vrms or 7.5Vpk) may be used in applications where the actual isolation requirement is lower than the original specification, provided circuit design margins are maintained.

Current Transfer Ratio: Substitute parts must demonstrate measurable current transfer ratio performance within acceptable ranges for the application, though exact percentage matching is not required for functional substitution.

Parameter Comparison

Engineering Selection Recommendations

CNY17F2SR2VM (onsemi): This substitute maintains onsemi manufacturer continuity and is actively produced. It provides 4170Vrms isolation with 70V maximum output voltage, exceeding the MOC81053SD output voltage capability. The operating temperature range of -40°C to 100°C covers the upper portion of the original specification. This part is RoHS3 compliant and suitable for applications where the isolation requirement is ≤4170Vrms. Tape & Reel packaging supports high-volume production environments.

MOC8105SM (Isocom Components 2004 LTD): This substitute offers identical operating temperature range (-55°C to 100°C) and matching output voltage/current specifications. The 7.5Vpk isolation rating indicates this part is suitable only for applications with significantly lower isolation requirements than the original MOC81053SD. RoHS3 compliance is provided. Tube packaging is appropriate for lower-volume or manual assembly operations.

MOC8105SMT&R (Isocom Components 2004 LTD): Functionally identical to MOC8105SM with identical electrical specifications and RoHS3 compliance. The primary distinction is Tape & Reel packaging, which supports automated assembly and high-volume production. This configuration is preferred for manufacturing environments utilizing pick-and-place equipment.

Frequently Asked Questions (FAQ)

Q: Can CNY17F2SR2VM replace MOC81053SD in all applications? A: CNY17F2SR2VM is suitable for applications where the actual isolation requirement does not exceed 4170Vrms. If your circuit design requires the full 5300Vrms isolation rating of the original MOC81053SD, this substitute is not appropriate. Verify your isolation voltage requirement before selection.

Q: What is the difference between MOC8105SM and MOC8105SMT&R? A: Both parts are electrically identical. The difference is packaging format: MOC8105SM uses Tube packaging for manual or low-volume assembly, while MOC8105SMT&R uses Tape & Reel format for automated pick-and-place assembly. Select based on your manufacturing process requirements.

Q: Are the MOC8105 variants suitable for high-isolation applications? A: No. The MOC8105 series specifies 7.5Vpk isolation, which is substantially lower than the MOC81053SD's 5300Vrms rating. These parts are only suitable for applications with minimal isolation requirements. Do not use these substitutes if your design requires high-voltage isolation.

Q: What compliance certifications apply to these substitute parts? A: CNY17F2SR2VM is RoHS3 compliant. Both MOC8105SM and MOC8105SMT&R are RoHS3 compliant. All parts are REACH unaffected and classified as EAR99 for export control purposes.

Q: Can I use these substitutes interchangeably in my PCB design? A: All four parts use identical 6-SMD Gull Wing package geometry, enabling direct PCB footprint compatibility. However, electrical parameter differences (particularly isolation voltage) require circuit-level evaluation before substitution.

Q: What is the operating temperature difference between substitutes? A: MOC81053SD and both MOC8105 variants operate across -55°C to 100°C. CNY17F2SR2VM operates across -40°C to 100°C, which excludes the lower temperature extreme. Verify your application's minimum operating temperature requirement before selecting CNY17F2SR2VM.