FODM3052R4 Equivalent & Substitute Parts

Part Overview

The FODM3052R4 is a 3.75kV isolation optoisolator with triac output manufactured by onsemi. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part features single-channel triac output in a 4-SMD gull wing package, suitable for high-voltage isolation applications requiring galvanic separation.

Substiute Parts

FODM3052R4

onsemiIn Stock: 785FODM3052R4 Datasheet

Current PartRFQ

S2S3LA0F

SHARP/Socle TechnologyIn Stock: 1498S2S3LA0F Datasheet

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S2S5A00F

SHARP/Socle TechnologyIn Stock: 27752S2S5A00F Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the FODM3052R4 is based on the following critical parameters that must remain constant or compatible:

• Voltage - Isolation: 3750Vrms (mandatory match)
• Output Type: Triac (mandatory match)
• Number of Channels: 1 (mandatory match)
• Voltage - Off State: 600 V (mandatory match)
• Package / Case: 4-SMD, Gull Wing (mechanical compatibility required)
• Mounting Type: Surface Mount (mandatory match)

The identified substitute parts S2S3LA0F and S2S5A00F, both manufactured by SHARP/Socle Technology, meet these core substitution criteria. Both parts maintain the same isolation voltage, triac output configuration, single-channel design, and surface mount package format. However, variations exist in secondary parameters including static dV/dt rating, trigger current, on-state current, hold current, and turn-on time specifications.

Parameter Comparison

Engineering Selection Recommendations

S2S5A00F is the primary substitute for FODM3052R4. This part maintains identical package geometry (4-SMD, Gull Wing), matching the mechanical footprint of the original component. Both parts share the same LED trigger current maximum (10mA) and forward voltage characteristics. S2S5A00F is currently in active production status with RoHS compliance certification and higher inventory availability (27,720 pcs). The static dV/dt rating of 500V/µs provides adequate performance for most applications requiring the original 1kV/µs specification.

S2S3LA0F serves as a secondary substitute option. This part differs in package designation (4-SMD without explicit gull wing specification) and features a lower LED trigger current maximum (5mA). The static dV/dt rating of 100V/µs is significantly reduced compared to the original specification. S2S3LA0F is suitable only for applications where lower dV/dt performance is acceptable and where the reduced trigger current requirement aligns with circuit design parameters.

Both substitute parts are manufactured by SHARP/Socle Technology and hold CSA and UR certifications. The operating temperature range narrows from -40°C to -30°C minimum, which may impact applications requiring extended low-temperature operation.

Frequently Asked Questions (FAQ)

Q: Can S2S3LA0F and S2S5A00F be used interchangeably with FODM3052R4?

A: Both parts meet the core substitution criteria of 3750Vrms isolation, triac output, single-channel configuration, and 600V off-state voltage. However, they differ in secondary electrical characteristics. S2S5A00F is the preferred direct substitute due to matching LED trigger current and superior dV/dt performance. S2S3LA0F requires circuit-level evaluation due to reduced dV/dt and trigger current specifications.

Q: What are the key differences between S2S3LA0F and S2S5A00F?

A: The primary differences are static dV/dt rating (100V/µs vs. 500V/µs), LED trigger current maximum (5mA vs. 10mA), and package designation. S2S5A00F maintains closer electrical alignment with the original FODM3052R4 specification. Both parts share identical isolation voltage, on-state current maximum (50mA), hold current (4.6mA), and turn-on time (100µs max).

Q: Are there packaging compatibility concerns when substituting these parts?

A: S2S5A00F maintains the 4-SMD gull wing package format, ensuring direct PCB footprint compatibility. S2S3LA0F uses a 4-SMD package without explicit gull wing designation, requiring physical verification of lead geometry and spacing before board-level substitution.

Q: What certifications apply to the substitute parts?

A: Both S2S3LA0F and S2S5A00F hold CSA and UR certifications. The original FODM3052R4 includes BSI, CSA, and UL certifications. Applications requiring specific certification compliance should confirm alignment with system-level requirements.

Q: How does the operating temperature range affect substitution?

A: The substitute parts operate from -30°C to 100°C, compared to the original -40°C to 100°C range. Applications requiring operation below -30°C cannot use these substitutes without additional thermal management or circuit redesign.

Q: What is the inventory status of these substitute parts?

A: S2S5A00F has 27,720 pcs in stock. S2S3LA0F has 1,439 pcs in stock. Both parts are in active production status, ensuring long-term availability compared to the obsolete FODM3052R4.