FOD819SD Equivalent & Substitute Parts

Part Overview

The FOD819SD is an optoisolator with transistor output manufactured by onsemi, designed for high-voltage isolation applications requiring 5000Vrms isolation rating. This component features a single channel configuration in a 4-SMD surface mount package with gull wing leads. The part is currently in Last Time Buy status, making identification of equivalent and substitute parts essential for design continuity and procurement planning.

Substiute Parts

FOD819SD

onsemiIn Stock: 2709FOD819SD Datasheet

Current PartRFQ

FOD819S

onsemiIn Stock: 1785FOD819S Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The FOD819SD has one parametric equivalent substitute: FOD819S. Substitution between these parts is valid based on the following criteria:

Critical Matching Parameters:

• Voltage - Isolation: 5000Vrms (identical)
• Number of Channels: 1 (identical)
• Current Transfer Ratio: 100% - 600% @ 1.5mA (identical)
• Output Type: Transistor (identical)
• Voltage - Output (Max): 80V (identical)
• Current - Output / Channel: 30mA (identical)
• Operating Temperature Range: -55°C ~ 110°C (identical)
• Mounting Type: Surface Mount (identical)
• Package / Case: 4-SMD, Gull Wing (identical)

Difference: The primary distinction between FOD819SD and FOD819S is packaging format: FOD819SD is supplied in Cut Tape (CT), while FOD819S is supplied in Tape & Reel (TR). Both parts share identical electrical and mechanical specifications, making them functionally interchangeable at the component level.

Parameter Comparison

Engineering Selection Recommendations

Both FOD819SD and FOD819S are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. Selection between these parts should be based on procurement and assembly requirements:

FOD819SD (Cut Tape): Suitable for low-volume applications, prototype builds, or situations where smaller quantities are required per order cycle.

FOD819S (Tape & Reel): Appropriate for high-volume production runs and automated assembly processes where tape and reel packaging provides handling efficiency and cost optimization.

Both parts maintain identical electrical performance, isolation rating, and thermal operating range. The Last Time Buy status of both components indicates limited future availability, making early procurement planning necessary for long-term design support.

Frequently Asked Questions (FAQ)

Q: Can FOD819S replace FOD819SD in production? A: Yes. The parts are electrically and mechanically identical. The only difference is packaging format (Tape & Reel versus Cut Tape). Substitution is valid for both prototype and production applications.

Q: What does Last Time Buy status mean for these parts? A: Last Time Buy indicates that onsemi has announced end-of-life for this product line. Existing inventory will be sold until depletion, after which the parts will no longer be available. Design teams should plan accordingly and consider long-term supply strategies.

Q: Are there any compliance differences between FOD819SD and FOD819S? A: No. Both parts carry identical RoHS3 compliance, REACH unaffected status, and MSL ratings. They meet the same regulatory and environmental standards.

Q: Does packaging format affect circuit performance? A: No. Packaging format (Cut Tape or Tape & Reel) does not affect electrical performance, isolation rating, or thermal characteristics. The difference is purely in supply and handling format.

Q: What are the critical parameters for substitution in optoisolator applications? A: For FOD819 series substitution, the critical parameters are: isolation voltage (5000Vrms), number of channels (1), current transfer ratio range (100-600% @ 1.5mA), output type (transistor), maximum output voltage (80V), and output current capability (30mA). All these parameters must match for valid substitution.