MOC80203SD Equivalent & Substitute Parts

Part Overview

The MOC80203SD is an optoisolator with Darlington output manufactured by onsemi, featuring 5300Vrms isolation voltage and 1 channel configuration in 6-SMD surface mount packaging. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part operates across a temperature range of -55°C to 100°C with a current transfer ratio minimum of 500% at 10mA input.

Substiute Parts

MOC80203SD

onsemiIn Stock: 681MOC80203SD Datasheet

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MOC8050SR2VM

onsemiIn Stock: 2454MOC8050SR2VM Datasheet

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MOC8020SM

Isocom Components 2004 LTDIn Stock: 884MOC8020SM Datasheet

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MOC8020SMT&R

Isocom Components 2004 LTDIn Stock: 1155MOC8020SMT&R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MOC80203SD are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Single channel Darlington output optoisolator configuration
• 6-SMD surface mount package with gull wing leads
• DC input type
• Isolation voltage rating (minimum acceptable threshold)
• Output voltage and current specifications
• Operating temperature range coverage
• Moisture sensitivity level

Substitute Groups:

Group 1: onsemi MOC8050SR2VM — Active product with reduced isolation voltage (4170Vrms vs. 5300Vrms) but higher maximum output voltage (80V vs. 50V). Maintains 500% minimum current transfer ratio and 150mA output current. Extended output voltage capability may accommodate applications with higher voltage requirements.

Group 2: Isocom Components MOC8020SM and MOC8020SMT&R — Active products from alternative manufacturer with significantly lower isolation voltage specification (7.5Vpk). These parts share identical package configuration and Darlington output type but operate within different isolation voltage parameters. Packaging variants include tube (MOC8020SM) and tape & reel (MOC8020SMT&R) options.

Parameter Comparison

Engineering Selection Recommendations

MOC8050SR2VM (onsemi) — Recommended as primary substitute. Maintains onsemi manufacturer continuity with active product status. Isolation voltage is reduced to 4170Vrms but remains within the same product family (MOC8050 base series). Output voltage capability increases to 80V, providing broader application flexibility. Operating temperature minimum of -40°C is narrower than the original -55°C specification. RoHS3 compliance provides regulatory advantage over the obsolete original part.

MOC8020SM or MOC8020SMT&R (Isocom Components) — Alternative substitutes with active product status from established manufacturer. Isolation voltage specification (7.5Vpk) differs significantly from the original 5300Vrms rating and requires application-level evaluation. Output voltage maximum of 35V is lower than the original 50V. Operating temperature range (-25°C to 100°C) is narrower. Packaging options accommodate different procurement workflows: MOC8020SM in tube format or MOC8020SMT&R in tape & reel format. Both variants maintain RoHS3 compliance.

Selection between these substitutes depends on isolation voltage requirements, output voltage specifications, and operating temperature constraints of the target application.

Frequently Asked Questions (FAQ)

Q: Can MOC8050SR2VM directly replace MOC80203SD in all applications?

A: MOC8050SR2VM shares the same 6-SMD package configuration, single channel Darlington output, and 500% minimum current transfer ratio. However, isolation voltage is reduced from 5300Vrms to 4170Vrms, and operating temperature minimum is -40°C instead of -55°C. Applications requiring the full 5300Vrms isolation specification or operation below -40°C require evaluation against specific circuit requirements.

Q: What is the primary difference between MOC8020SM and MOC8020SMT&R?

A: Both parts are identical in electrical and mechanical specifications. The difference is packaging format: MOC8020SM is supplied in tube packaging, while MOC8020SMT&R is supplied in tape & reel format. Selection depends on procurement volume and assembly line requirements.

Q: Are all substitute parts RoHS compliant?

A: MOC8050SR2VM is RoHS3 compliant. MOC8020SM and MOC8020SMT&R are both RoHS3 compliant. The original MOC80203SD does not specify RoHS status. All substitutes meet current environmental compliance standards.

Q: What isolation voltage should I use for my application?

A: Isolation voltage selection depends on the maximum voltage differential that must be isolated in your circuit. MOC80203SD provides 5300Vrms isolation. MOC8050SR2VM provides 4170Vrms isolation. MOC8020 series provides 7.5Vpk isolation. Select the substitute that meets or exceeds your application's isolation voltage requirement.

Q: Can I use MOC8020 series parts if my application requires higher isolation voltage?

A: No. MOC8020 series parts specify 7.5Vpk isolation voltage, which is substantially lower than MOC80203SD (5300Vrms) or MOC8050SR2VM (4170Vrms). These parts are suitable only for applications with low isolation voltage requirements.

Q: What is the impact of different operating temperature ranges?

A: MOC80203SD operates from -55°C to 100°C. MOC8050SR2VM operates from -40°C to 100°C. MOC8020 series operates from -25°C to 100°C. If your application requires operation below -40°C, MOC8050SR2VM is not suitable. If operation below -25°C is required, MOC8020 series is not suitable. Verify your application's minimum operating temperature requirement before selection.