FOD2741C Equivalent & Substitute Parts

Part Overview

The FOD2741C is an optoisolator with transistor output manufactured by onsemi, designed for 5000Vrms isolation applications. This component features a single channel configuration in an 8-DIP through-hole package and is classified as obsolete. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for design continuity and procurement planning. The FOD2741C remains available in inventory (17400 pcs), but alternative active components should be evaluated for new designs and long-term supply assurance.

Substiute Parts

FOD2741C

onsemiIn Stock: 17453FOD2741C Datasheet

Current PartRFQ

FOD2741B

Fairchild SemiconductorIn Stock: 17984FOD2741B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the FOD2741C is determined by strict equivalence across the following critical parameters:

• Voltage - Isolation: 5000Vrms (mandatory match)
• Number of Channels: 1 (mandatory match)
• Output Type: Transistor (mandatory match)
• Current Transfer Ratio: 100% - 200% @ 10mA (mandatory match)
• Voltage - Output (Max): 30V (mandatory match)
• Current - Output / Channel: 50mA (mandatory match)
• Package / Case: 8-DIP (0.300", 7.62mm) (mandatory match for through-hole compatibility)
• Operating Temperature Range: -40°C ~ 85°C (mandatory match)

The FOD2741B meets all substitution criteria and is classified as an active product, making it suitable for applications requiring the FOD2741C specifications.

Parameter Comparison

Engineering Selection Recommendations

The FOD2741B (Fairchild Semiconductor) is the direct substitute for the FOD2741C. Both components share identical electrical and mechanical specifications across all critical parameters. The primary distinction is product status: the FOD2741C is obsolete, while the FOD2741B is active. For new designs and applications requiring long-term component availability, the FOD2741B is the recommended selection. Both components carry identical compliance designations (ECCN: EAR99; HTSUS: 8541.49.8000), ensuring regulatory equivalence. The through-hole 8-DIP package format is consistent between both parts, allowing direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can the FOD2741B replace the FOD2741C in existing designs? A: Yes. The FOD2741B is electrically and mechanically equivalent to the FOD2741C. Both components feature identical isolation voltage (5000Vrms), current transfer ratio (100-200% @ 10mA), output voltage (30V max), output current (50mA), and package format (8-DIP). Direct substitution is supported without circuit modification.

Q: Why is the FOD2741C classified as obsolete? A: The FOD2741C is listed as obsolete by onsemi. The FOD2741B, manufactured by Fairchild Semiconductor, remains in active production and serves as the recommended alternative for ongoing applications.

Q: Are there any package or pinout differences between these parts? A: No. Both the FOD2741C and FOD2741B use the 8-DIP (0.300", 7.62mm) through-hole package with identical pinout and mechanical dimensions. PCB layouts require no modification for substitution.

Q: What is the current transfer ratio specification, and why is it important? A: The current transfer ratio is specified as 100% to 200% at 10mA input current. This parameter defines the relationship between input LED current and output transistor current. Both substitute parts maintain this specification, ensuring consistent circuit performance.

Q: Are compliance and regulatory certifications identical? A: Yes. Both the FOD2741C and FOD2741B carry identical compliance designations: ECCN EAR99 and HTSUS 8541.49.8000. No regulatory differences exist between these components.

Q: What operating temperature range do these components support? A: Both components operate across the temperature range of -40°C to 85°C, supporting industrial and commercial applications within this specification.