FOD817CW Equivalent & Substitute Parts

Part Overview

The FOD817CW is a 5000Vrms optoisolator with transistor output in a 4-DIP package, manufactured by onsemi. This component provides galvanic isolation for low-speed digital and analog signal transmission applications. The FOD817CW is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Active alternatives with identical or compatible electrical and mechanical specifications are available from onsemi and Lite-On Inc.

Substiute Parts

FOD817CW

onsemiIn Stock: 703FOD817CW Datasheet

Current PartRFQ

FOD817C300W

onsemiIn Stock: 86369FOD817C300W Datasheet

SimilarRFQ

LTV-817M

Lite-On Inc.In Stock: 7991LTV-817M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the FOD817CW is determined by the following critical parameters:

• Isolation Voltage: 5000Vrms (mandatory match)
• Package Configuration: 4-DIP through-hole form factor (mandatory match)
• Output Type: Transistor output (mandatory match)
• Number of Channels: Single channel (mandatory match)
• Operating Temperature Range: -55°C to 110°C (mandatory match)
• Input Type: DC (mandatory match)
• Maximum Output Current: 50mA per channel (mandatory match)

The FOD817C300W from onsemi qualifies as a direct substitute, maintaining identical electrical and mechanical specifications while offering active product status and improved availability. The LTV-817M from Lite-On Inc. qualifies as a functional equivalent with compatible core specifications, though with different current transfer ratio ranges and maximum output voltage rating.

Parameter Comparison

Engineering Selection Recommendations

FOD817C300W (onsemi): This part is the preferred substitute for the obsolete FOD817CW. It maintains identical electrical specifications and package configuration while offering active product status and higher inventory availability (86,301 units in stock). The FOD817C300W is ROHS3 compliant and carries REACH Unaffected status, meeting modern regulatory requirements. This option provides direct compatibility with existing FOD817CW designs without circuit modification.

LTV-817M (Lite-On Inc.): This part qualifies as a functional equivalent for applications where the maximum output voltage requirement does not exceed 35V. The LTV-817M offers active product status and ROHS3 compliance. The current transfer ratio range differs (50% to 600% @ 5mA versus 200% to 400% @ 5mA), which may affect circuit performance in applications with tight CTR specifications. The LTV-817M is suitable for designs that can accommodate the lower maximum output voltage and broader CTR tolerance.

Frequently Asked Questions (FAQ)

Q: Can FOD817C300W be used as a direct replacement for FOD817CW? A: Yes. The FOD817C300W maintains identical electrical and mechanical specifications, including isolation voltage, output voltage rating, output current, package type, and operating temperature range. No circuit modifications are required.

Q: What is the key difference between FOD817C300W and LTV-817M? A: The primary differences are maximum output voltage (70V for FOD817C300W versus 35V for LTV-817M) and current transfer ratio range (200-400% for FOD817C300W versus 50-600% for LTV-817M). Applications requiring output voltages above 35V must use FOD817C300W.

Q: Are both substitute parts compatible with the 4-DIP through-hole footprint? A: Yes. Both FOD817C300W and LTV-817M use the identical 4-DIP (0.400", 10.16mm) package and through-hole mounting configuration, ensuring direct PCB compatibility.

Q: Do the substitute parts meet current regulatory compliance standards? A: Both FOD817C300W and LTV-817M are ROHS3 compliant and carry REACH Unaffected status. The obsolete FOD817CW does not specify RoHS compliance.

Q: What inventory considerations apply to these substitutes? A: FOD817C300W has significantly higher availability (86,301 units) compared to LTV-817M (7,980 units), making it the preferred choice for high-volume production requirements.