MOC80503SD Equivalent & Substitute Parts

Part Overview

The MOC80503SD 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. Equivalent alternatives must maintain compatibility across isolation voltage, output type, channel configuration, and thermal operating range to ensure functional equivalence in isolation and signal transfer applications.

Substiute Parts

MOC80503SD

onsemiIn Stock: 947MOC80503SD Datasheet

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MOC8050SR2VM

onsemiIn Stock: 2454MOC8050SR2VM Datasheet

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MOC8050SM

Isocom Components 2004 LTDIn Stock: 753MOC8050SM Datasheet

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MOC8050SMT&R

Isocom Components 2004 LTDIn Stock: 1133MOC8050SMT&R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MOC80503SD is determined by the following critical parameters:

• Isolation Voltage: Substitute parts must maintain minimum 5300Vrms isolation or higher to preserve electrical safety margins
• Output Type: Darlington output configuration is mandatory for functional equivalence
• Number of Channels: Single channel (1) configuration required
• Voltage - Output (Max): Must support minimum 80V output voltage
• Current - Output / Channel: Must support minimum 150mA output current
• Mounting Type & Package: Surface mount 6-SMD Gull Wing package required for PCB compatibility
• Operating Temperature Range: Must encompass or exceed -55°C ~ 100°C specification

Based on these criteria, the following parts qualify as substitutes:

Group A - Direct Substitutes (5000Vrms+ Isolation):

• MOC8050SMT&R (onsemi alternative, Tape & Reel packaging)
• MOC8050SM (Isocom alternative, Tube packaging)

Group B - Reduced Isolation Substitute (4170Vrms Isolation):

• MOC8050SR2VM (onsemi alternative, lower isolation voltage)

Parameter Comparison

Engineering Selection Recommendations

MOC8050SMT&R and MOC8050SM are the preferred substitutes for the obsolete MOC80503SD. Both parts maintain 5000Vrms isolation voltage, exceeding the minimum 5300Vrms requirement with acceptable margin, and support the full -55°C ~ 110°C operating temperature range. Both are active products with ROHS3 compliance and REACH unaffected status, ensuring long-term availability and regulatory compliance.

MOC8050SR2VM is an alternative from onsemi with active product status and ROHS3 compliance. However, its 4170Vrms isolation voltage is below the original 5300Vrms specification. This part is suitable only for applications where reduced isolation voltage is acceptable within system design margins.

Current Output Consideration: MOC8050SM and MOC8050SMT&R specify 80mA maximum output current per channel, compared to the MOC80503SD's 150mA. Applications requiring the full 150mA output current must use MOC8050SR2VM, which maintains 150mA output capability.

Frequently Asked Questions (FAQ)

Q: Can MOC8050SM or MOC8050SMT&R directly replace MOC80503SD?

A: Both parts are mechanically and functionally compatible in 6-SMD Gull Wing surface mount applications. However, MOC8050SM and MOC8050SMT&R are rated for 80mA maximum output current, while MOC80503SD supports 150mA. If your circuit requires 150mA output current, use MOC8050SR2VM instead.

Q: What is the difference between MOC8050SM and MOC8050SMT&R?

A: Both parts are electrically identical with 5000Vrms isolation and identical electrical specifications. The difference is packaging: MOC8050SM is supplied in Tube packaging, while MOC8050SMT&R is supplied in Tape & Reel (TR) format. Select based on your procurement and assembly requirements.

Q: Is MOC8050SR2VM a suitable replacement?

A: MOC8050SR2VM is suitable if your application can operate with 4170Vrms isolation instead of 5300Vrms. It maintains 150mA output current capability and is an active onsemi product. Verify that your isolation voltage margin requirements are met before selection.

Q: Are all substitute parts RoHS compliant?

A: MOC8050SR2VM, MOC8050SM, and MOC8050SMT&R are all ROHS3 compliant. The original MOC80503SD does not specify RoHS status in available documentation.

Q: What is the operating temperature difference?

A: MOC80503SD operates -55°C ~ 100°C. MOC8050SR2VM operates -40°C ~ 100°C (narrower low-temperature range). MOC8050SM and MOC8050SMT&R operate -55°C ~ 110°C (extended high-temperature range). Select based on your thermal environment requirements.