FOD2742C Equivalent & Substitute Parts

Part Overview

The FOD2742C is an optoisolator with transistor output manufactured by onsemi, designed for applications requiring galvanic isolation up to 2500Vrms. This component features a single channel configuration in an 8-SOIC surface mount package with a maximum output voltage of 70V and output current capability of 50mA per channel.

The FOD2742C is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for existing applications and new designs.

Substiute Parts

FOD2742C

onsemiIn Stock: 2757FOD2742C Datasheet

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FOD2742B

onsemiIn Stock: 5939FOD2742B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FOD2742C are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Number of Channels: 1
• Voltage - Isolation: 2500Vrms
• Current Transfer Ratio range: 100% to 200% @ 10mA
• Output Type: Transistor
• Voltage - Output (Max): 70V
• Current - Output / Channel: 50mA
• Voltage - Forward (Vf) (Typ): 1.2V
• Vce Saturation (Max): 400mV
• Operating Temperature: -25°C ~ 85°C
• Package / Case: 8-SOIC (0.154", 3.90mm Width)

The FOD2742B meets all electrical and mechanical parameters specified for the FOD2742C, making it a direct functional equivalent. The primary distinction is product status: FOD2742B is active, whereas FOD2742C is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The FOD2742B is the direct substitute for the FOD2742C. Both components share identical electrical specifications and mechanical packaging. The FOD2742B offers the advantage of active product status, ensuring ongoing manufacturer support and supply chain availability. Additionally, the FOD2742B carries ROHS3 compliance certification, meeting current regulatory requirements for electronic components in many jurisdictions.

For new designs or redesigns of existing applications currently using the FOD2742C, the FOD2742B is the appropriate selection. Both components maintain equivalent performance characteristics across all specified electrical parameters, isolation voltage, output current capability, and operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can FOD2742B be used as a direct replacement for FOD2742C? A: Yes. The FOD2742B is electrically and mechanically equivalent to the FOD2742C. All critical parameters including isolation voltage (2500Vrms), current transfer ratio (100-200% @ 10mA), output voltage (70V max), output current (50mA), and package type (8-SOIC) are identical.

Q: What is the primary difference between FOD2742C and FOD2742B? A: The FOD2742C is classified as obsolete, while the FOD2742B is active. The FOD2742B also carries ROHS3 compliance certification. Electrical and mechanical specifications are identical.

Q: Are there any package or pinout differences between these parts? A: No. Both the FOD2742C and FOD2742B use the 8-SOIC package with identical dimensions (0.154" width, 3.90mm). Pinout and mechanical compatibility are equivalent.

Q: What compliance certifications apply to these optoisolators? A: Both components are REACH Unaffected. The FOD2742B additionally carries ROHS3 compliance. Both have Moisture Sensitivity Level 1 (Unlimited).

Q: Can these parts be used interchangeably in PCB designs? A: Yes. The FOD2742B can be substituted for the FOD2742C without PCB layout modifications. Both components are surface mount, 8-SOIC package with identical pin assignments and electrical characteristics.