FOD2743C Equivalent & Substitute Parts

Part Overview

The FOD2743C is a transistor output optoisolator manufactured by onsemi, rated for 5000Vrms isolation voltage with single-channel configuration in 8-DIP through-hole packaging. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The part delivers 50-100% current transfer ratio at 1mA input with 50mA maximum output current and 400mV maximum saturation voltage, suitable for applications requiring galvanic isolation in low-to-medium speed switching circuits.

Substiute Parts

FOD2743C

onsemiIn Stock: 17200FOD2743C Datasheet

Current PartRFQ

FOD2743B

Fairchild SemiconductorIn Stock: 10222FOD2743B Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FOD2743C is determined by strict equivalence across the following critical parameters:

• Isolation voltage rating: 5000Vrms minimum
• Output configuration: Single-channel transistor output
• Current transfer ratio range: 50-100% @ 1mA
• Maximum output current: 50mA per channel
• Maximum saturation voltage: 400mV
• Package type: 8-DIP through-hole
• Operating temperature range: -40°C to 85°C minimum
• Input type: DC

The FOD2743B qualifies as a direct substitute, matching all specified electrical and mechanical parameters while maintaining identical pinout and functional characteristics.

Parameter Comparison

Engineering Selection Recommendations

The FOD2743B from Fairchild Semiconductor is the qualified substitute for the obsolete FOD2743C. Both components carry identical electrical specifications and mechanical packaging, ensuring direct functional replacement without circuit modification.

The FOD2743B maintains active product status, providing supply continuity and long-term availability compared to the obsolete FOD2743C. Both parts comply with ECCN EAR99 and HTSUS 8541.49.8000 classifications, maintaining consistent regulatory standing for procurement and export purposes.

Selection between these parts should be based on supply availability and lead time requirements, as electrical and mechanical compatibility is complete.

Frequently Asked Questions (FAQ)

Q: Can FOD2743B replace FOD2743C in existing designs? A: Yes. The FOD2743B is a direct substitute with identical isolation voltage (5000Vrms), current transfer ratio (50-100% @ 1mA), output current rating (50mA), saturation voltage (400mV), and 8-DIP package configuration. No circuit modifications are required.

Q: Are there pinout differences between FOD2743C and FOD2743B? A: No. Both components use identical 8-DIP (0.300", 7.62mm) through-hole packaging with matching pinout, enabling direct socket replacement.

Q: What is the primary reason to substitute FOD2743C? A: The FOD2743C is classified as obsolete. The FOD2743B maintains active product status, ensuring continued supply availability and manufacturing support.

Q: Do both parts operate across the same temperature range? A: Yes. Both FOD2743C and FOD2743B operate from -40°C to 85°C, maintaining identical thermal performance specifications.

Q: Are there compliance or certification differences? A: No. Both parts share identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications, maintaining consistent regulatory compliance for procurement and international trade.