FOD2743CS Equivalent & Substitute Parts

Part Overview

The FOD2743CS is an optoisolator with transistor output manufactured by onsemi, designed for applications requiring 5000Vrms isolation with a single channel configuration. This component features DC input, transistor output topology, and is housed in an 8-SMD surface mount package. The product is currently classified as obsolete, making identification of functionally equivalent alternatives essential for design continuity and procurement planning.

Substiute Parts

FOD2743CS

onsemiIn Stock: 949FOD2743CS Datasheet

Current PartRFQ

FOD2743BS

Fairchild SemiconductorIn Stock: 1041FOD2743BS Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FOD2743CS is determined by strict equivalence across the following critical parameters:

• Isolation Voltage: 5000Vrms (mandatory match)
• Number of Channels: 1 (mandatory match)
• Output Configuration: Transistor output (mandatory match)
• Input Type: DC (mandatory match)
• Current Transfer Ratio Range: 50% to 100% @ 1mA (mandatory match)
• Maximum Output Voltage: 70V (mandatory match)
• Maximum Output Current: 50mA per channel (mandatory match)
• Package Type: 8-SMD, Gull Wing surface mount (mandatory match)
• Operating Temperature Range: -40°C to 85°C (mandatory match)

The FOD2743BS meets all substitution criteria and is classified as an active product, providing design continuity for applications currently using the obsolete FOD2743CS.

Parameter Comparison

Engineering Selection Recommendations

The FOD2743BS is the direct equivalent substitute for the FOD2743CS. Both components share identical electrical specifications, isolation ratings, and package configurations. The primary distinction is product status: the FOD2743CS is obsolete while the FOD2743BS is active and currently in production.

For new designs or component replenishment, the FOD2743BS should be selected. Both components carry identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications, ensuring equivalent regulatory and compliance status. The FOD2743BS maintains full compatibility with existing circuit designs specified for the FOD2743CS.

Frequently Asked Questions (FAQ)

Q: Can the FOD2743BS directly replace the FOD2743CS in existing designs?

A: Yes. The FOD2743BS is electrically and mechanically identical to the FOD2743CS. All electrical parameters, isolation voltage, output characteristics, and package dimensions are equivalent. Direct substitution is supported without circuit modification.

Q: Why is the FOD2743CS listed as obsolete?

A: Product obsolescence is determined by manufacturer discontinuation. The FOD2743BS remains in active production and serves the same functional requirements.

Q: Are there any differences in compliance or certifications between these parts?

A: Both components share identical ECCN and HTSUS classifications. No compliance differences exist between the two parts.

Q: What is the significance of the 8-SMD, Gull Wing package?

A: This package designation specifies the physical form factor and lead configuration for surface mount assembly. Both the FOD2743CS and FOD2743BS use this identical package, ensuring compatibility with existing PCB layouts and assembly processes.

Q: What isolation voltage does this optoisolator provide?

A: Both the FOD2743CS and FOD2743BS provide 5000Vrms isolation, suitable for high-voltage isolation applications requiring galvanic separation between input and output circuits.