FOD817BW Equivalent & Substitute Parts

Part Overview

The FOD817BW is a 5000Vrms optoisolator with transistor output in a 4-DIP package manufactured by onsemi. This component provides galvanic isolation for low-speed digital signal transmission in industrial and consumer applications. The FOD817BW is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across isolation voltage, current transfer ratio, output characteristics, and thermal operating range.

Substiute Parts

FOD817BW

onsemiIn Stock: 1050FOD817BW Datasheet

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FOD817B300W

onsemiIn Stock: 1445FOD817B300W Datasheet

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LTV-817M

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

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the FOD817BW is determined by the following critical parameters:

• Isolation Voltage: Must equal 5000Vrms
• Package / Case: Must be 4-DIP (0.400", 10.16mm) for mechanical and electrical compatibility
• Mounting Type: Must be Through Hole
• Output Type: Must be Transistor
• Number of Channels: Must be 1
• Operating Temperature Range: Must support -55°C to 110°C minimum
• Input Type: Must be DC

The FOD817B300W (onsemi) and LTV-817M (Lite-On Inc.) meet these core substitution criteria. Both parts maintain the same isolation voltage, package configuration, and thermal operating range. Variations in current transfer ratio ranges and maximum output voltage do not preclude substitution when circuit design accounts for these parameter differences.

Parameter Comparison

Engineering Selection Recommendations

FOD817B300W (onsemi): This part is the direct onsemi equivalent with identical electrical specifications to the FOD817BW. The FOD817B300W carries Active product status and ROHS3 compliance, making it suitable for new designs and production environments requiring regulatory adherence. Packaging is supplied in Tube format.

LTV-817M (Lite-On Inc.): This part provides functional substitution with the same isolation voltage, package, and thermal range. The LTV-817M exhibits a wider current transfer ratio range (50% to 600% @ 5mA) and lower maximum output voltage (35V versus 70V). The LTV-817M is Active and ROHS3 compliant. Circuit designs must account for the reduced maximum output voltage specification when selecting this substitute.

Frequently Asked Questions (FAQ)

Q: Can FOD817B300W directly replace FOD817BW in existing designs?

A: Yes. The FOD817B300W maintains identical electrical specifications including isolation voltage, current transfer ratio range, output voltage, output current, and thermal operating range. Pin configuration and package dimensions are equivalent, supporting direct PCB substitution.

Q: Is LTV-817M compatible with FOD817BW applications?

A: LTV-817M is mechanically and electrically compatible for most applications. The key difference is maximum output voltage: LTV-817M is rated 35V maximum versus 70V for FOD817BW. Applications requiring output voltages above 35V must use FOD817B300W or FOD817BW. The wider current transfer ratio range of LTV-817M (50% to 600%) may require circuit design verification.

Q: What is the impact of different current transfer ratio ranges?

A: Current transfer ratio determines the output current for a given input current. FOD817BW and FOD817B300W specify 130% to 260% @ 5mA, while LTV-817M specifies 50% to 600% @ 5mA. Circuit designs must account for these ranges in input drive current calculations and output load specifications.

Q: Are all substitute parts RoHS compliant?

A: FOD817B300W and LTV-817M are both ROHS3 compliant. The original FOD817BW RoHS status is not specified in available documentation.

Q: What is the difference in packaging between FOD817B300W and FOD817BW?

A: FOD817BW packaging format is not specified. FOD817B300W is supplied in Tube packaging. Both use identical 4-DIP (0.400", 10.16mm) package cases suitable for through-hole PCB assembly.