MOC8020 Equivalent & Substitute Parts

Part Overview

The MOC8020 is a high-voltage optoisolator with Darlington output, rated for 5300Vrms isolation voltage. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The MOC8020 operates as a single-channel optoisolator in a 6-DIP through-hole package, suitable for applications requiring galvanic isolation with moderate output current capability.

Substiute Parts

MOC8020

onsemiIn Stock: 2223MOC8020 Datasheet

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MOC8050M

onsemiIn Stock: 1721MOC8050M Datasheet

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4N45

Broadcom LimitedIn Stock: 8714N45 Datasheet

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4N46

Broadcom LimitedIn Stock: 48704N46 Datasheet

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LTV-715F

Lite-On Inc.In Stock: 910LTV-715F Datasheet

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MOC8020

onsemiIn Stock: 2223MOC8020 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the MOC8020 is determined by the following critical parameters:

Package Compatibility: All substitute parts must use the 6-DIP (0.300", 7.62mm) through-hole package to ensure direct PCB compatibility without layout modifications.

Isolation Voltage: The MOC8020 provides 5300Vrms isolation. Substitute parts with equal or higher isolation voltage (5300Vrms or greater) maintain the same safety margin. Parts with lower isolation voltage (3750Vrms, 4170Vrms, 5000Vrms) represent reduced isolation capability and are acceptable only when system requirements permit.

Output Configuration: The MOC8020 features Darlington output without base connection. Substitute parts with Darlington output (with or without base) are functionally compatible, though base-connected variants offer additional design flexibility.

Output Current Capability: The MOC8020 supports 150mA output current. Substitute parts with equal or higher current rating (150mA or greater) provide direct replacement capability. Parts with lower current ratings (60mA, 80mA) require circuit redesign and are suitable only for reduced-current applications.

Current Transfer Ratio: The MOC8020 specifies 500% minimum CTR at 10mA input. Substitute parts meeting or exceeding this specification ensure equivalent switching performance.

Parameter Comparison

Engineering Selection Recommendations

MOC8050M (onsemi): Active product status with same manufacturer lineage as MOC8020. Maintains 150mA output current and 500% minimum CTR. Isolation voltage reduced to 4170Vrms. RoHS3 compliant. Suitable for applications where isolation voltage requirement is 4170Vrms or lower and full output current is required.

LTV-715F (Lite-On Inc.): Active product with 5000Vrms isolation, closely matching MOC8020 isolation specification. Supports 80mA output current and 600% minimum CTR at 1mA. RoHS3 compliant. Suitable for applications requiring high isolation voltage with moderate output current.

4N45 (Broadcom Limited): Active product with 3750Vrms isolation and Darlington output with base connection. Output current limited to 60mA. Operating temperature range -40°C to 85°C. RoHS non-compliant. Suitable only for applications with reduced isolation voltage and current requirements.

4N46 (Broadcom Limited): Active product with 3750Vrms isolation and Darlington output with base connection. Output current limited to 60mA. Maximum output voltage 20V. Operating temperature range -40°C to 85°C. RoHS non-compliant. Suitable only for applications with reduced isolation voltage and current requirements.

Frequently Asked Questions (FAQ)

Q: Can MOC8050M directly replace MOC8020 in existing designs? A: MOC8050M is pin-compatible in the 6-DIP package and maintains the same output current (150mA) and CTR specification (500% @ 10mA). However, isolation voltage is reduced from 5300Vrms to 4170Vrms. Direct replacement is acceptable only if system isolation requirements permit 4170Vrms operation.

Q: What is the primary limitation of 4N45 and 4N46 as MOC8020 substitutes? A: Both 4N45 and 4N46 are limited to 60mA output current compared to MOC8020's 150mA capability. Additionally, isolation voltage is reduced to 3750Vrms. These parts are suitable only for applications with lower current and isolation requirements. The base connection on these Darlington outputs provides additional design flexibility not present in MOC8020.

Q: Why is LTV-715F considered a suitable substitute despite different manufacturer? A: LTV-715F maintains high isolation voltage (5000Vrms, compared to MOC8020's 5300Vrms) and uses the same 6-DIP package. While output current is reduced to 80mA, the part is RoHS3 compliant and actively produced. It is suitable for applications where isolation voltage is the primary design constraint and output current can be reduced to 80mA.

Q: Are there temperature range considerations when substituting MOC8020? A: MOC8020 operates from -55°C to 100°C. MOC8050M and LTV-715F support -40°C to 100°C, which is acceptable for most industrial applications. 4N45 and 4N46 are limited to -40°C to 85°C, which may not be suitable for extended temperature range requirements.

Q: What compliance differences exist between MOC8020 and its substitutes? A: MOC8020 is not RoHS compliant. MOC8050M and LTV-715F are RoHS3 compliant, making them preferable for new designs subject to RoHS regulations. 4N45 and 4N46 are RoHS non-compliant. All parts are REACH unaffected and classified as EAR99.