FOD8153S Equivalent & Substitute Parts

Part Overview

The FOD8153S is a 5000Vrms isolation optoisolator with Darlington output configuration, manufactured by onsemi in a 4-SMD surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part delivers 1-channel isolation with 80mA output current capability and operates across the -30°C to 105°C temperature range.

Substiute Parts

FOD8153S

onsemiIn Stock: 45222FOD8153S Datasheet

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LTV-815S

Lite-On Inc.In Stock: 3089LTV-815S Datasheet

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LTV-815S-TA1

Lite-On Inc.In Stock: 3543LTV-815S-TA1 Datasheet

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LTV-852S-TA

Lite-On Inc.In Stock: 1088LTV-852S-TA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the FOD8153S is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:

Critical Parameters for Substitution:

• Isolation voltage: 5000Vrms (mandatory match)
• Output type: Darlington configuration (mandatory match)
• Package / Case: 4-SMD, Gull Wing (mandatory match)
• Number of channels: 1 (mandatory match)
• Input type: DC (mandatory match)
• Mounting type: Surface Mount (mandatory match)

Allowable Parameter Ranges:

• Current Transfer Ratio: Minimum 600% @ 1mA (FOD8153S baseline)
• Output voltage: 35V or higher
• Output current: 80mA or higher
• Operating temperature: Must support -30°C minimum; upper limit may vary
• Vce saturation: 1V or lower

The LTV-815S and LTV-815S-TA1 (both Lite-On Inc.) meet all critical parameters with identical electrical specifications. The LTV-852S-TA represents an enhanced variant with higher output current (150mA) and voltage (300V) capability, suitable for applications requiring greater power delivery within the same isolation and package constraints.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Direct Replacement):

LTV-815S and LTV-815S-TA1 are functionally equivalent to FOD8153S. Both parts are manufactured by Lite-On Inc., carry Active product status, and maintain identical electrical performance across all critical parameters. Both are ROHS3 compliant, providing regulatory advantage over the obsolete FOD8153S. Selection between LTV-815S (Tube packaging) and LTV-815S-TA1 (standard packaging) depends on procurement and assembly requirements.

Enhanced Substitute (Higher Performance):

LTV-852S-TA provides increased output current (150mA vs. 80mA) and maximum output voltage (300V vs. 35V) while maintaining 5000Vrms isolation and 4-SMD Gull Wing package compatibility. This variant is suitable for applications requiring higher power delivery. The rise/fall time characteristics differ (100µs, 20µs vs. 60µs, 53µs), requiring circuit-level evaluation for timing-sensitive applications. LTV-852S-TA is ROHS3 compliant and Active status.

Compliance Consideration:

All substitute parts carry REACH Unaffected status and EAR99 ECCN classification, matching the original FOD8153S regulatory profile. Moisture Sensitivity Level remains 1 (Unlimited) across all options.

Frequently Asked Questions (FAQ)

Q: Can LTV-815S directly replace FOD8153S in existing designs?

A: Yes. LTV-815S maintains identical electrical specifications for isolation voltage, output type, current transfer ratio, output current, and rise/fall time. The 4-SMD Gull Wing package and surface mount configuration are identical. The operating temperature upper limit is 100°C versus 105°C for FOD8153S; verify this does not exceed your application's thermal requirements.

Q: What is the difference between LTV-815S and LTV-815S-TA1?

A: Both parts are electrically identical. The difference is packaging: LTV-815S is supplied in Tube packaging, while LTV-815S-TA1 uses standard packaging. Select based on your procurement and assembly line requirements.

Q: When should LTV-852S-TA be used instead of LTV-815S?

A: LTV-852S-TA is specified when your application requires output current exceeding 80mA or output voltage exceeding 35V. The 150mA output current and 300V maximum voltage provide enhanced power delivery capability. However, the rise/fall time profile differs (100µs, 20µs vs. 60µs, 53µs); applications with strict timing requirements must evaluate this change.

Q: Are all substitute parts RoHS compliant?

A: Yes. LTV-815S, LTV-815S-TA1, and LTV-852S-TA are all ROHS3 compliant, providing environmental and regulatory advantage over the obsolete FOD8153S.

Q: What is the maximum operating temperature for substitute parts?

A: LTV-815S, LTV-815S-TA1, and LTV-852S-TA all operate to 100°C maximum. FOD8153S operates to 105°C. If your application requires operation above 100°C, the original part specification must be maintained or alternative solutions evaluated.

Q: Do all parts share the same isolation voltage rating?

A: Yes. All substitute parts maintain 5000Vrms isolation voltage, matching FOD8153S. This is a critical parameter that does not vary across the substitution group.