FOD3181S Equivalent & Substitute Parts

Part Overview

The FOD3181S is a 1.5A gate driver optical coupler manufactured by onsemi, designed for high-voltage isolation applications requiring 5000Vrms isolation. This component integrates an LED optocoupler with a gate driver output stage in an 8-SMD surface mount package. The FOD3181S is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

FOD3181S

onsemiIn Stock: 1396FOD3181S Datasheet

Current PartRFQ

FOD3180S

onsemiIn Stock: 1311FOD3180S Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The FOD3180S qualifies as a direct substitute for the FOD3181S based on the following alignment of critical parameters:

• Isolation Voltage: Both parts maintain 5000Vrms isolation capability
• Technology: Both utilize optical coupling technology
• Channel Configuration: Both feature single-channel design
• Package Type: Both use 8-SMD, Gull Wing surface mount packaging
• Output Supply Voltage: Both operate within 10V ~ 20V range
• Mounting Standard: Both are surface mount components compatible with identical PCB layouts

The FOD3180S represents an enhanced variant with improved electrical performance characteristics while maintaining mechanical and electrical interface compatibility.

Parameter Comparison

Engineering Selection Recommendations

The FOD3180S is the recommended substitute for the obsolete FOD3181S. Both components maintain identical mechanical compatibility and core electrical interface specifications, enabling direct PCB layout reuse without redesign.

The FOD3180S carries active product status from onsemi, ensuring continued availability and supply chain reliability. Both parts hold equivalent regulatory approvals (cUL, UL) and maintain identical REACH and export classification status.

The FOD3180S demonstrates enhanced performance across multiple parameters: higher common mode transient immunity (15kV/µs vs. 10kV/µs), faster propagation delay (200ns vs. 500ns), and increased output current capability (2A vs. 500mA, 2.5A peak vs. 1.5A peak). These improvements provide design margin without requiring circuit modifications.

The wider operating temperature range of the FOD3180S (-40°C to 100°C vs. -20°C to 85°C) accommodates extended environmental specifications when required.

Frequently Asked Questions (FAQ)

Q: Can FOD3180S replace FOD3181S in existing designs without PCB modifications?

A: Yes. Both components use identical 8-SMD, Gull Wing packaging with matching pinout and footprint. No PCB layout changes are required for substitution.

Q: What are the key performance differences between FOD3181S and FOD3180S?

A: The FOD3180S provides superior performance: faster propagation delay (200ns vs. 500ns), higher output current (2A vs. 500mA continuous, 2.5A vs. 1.5A peak), improved common mode transient immunity (15kV/µs vs. 10kV/µs), and extended operating temperature range (-40°C to 100°C vs. -20°C to 85°C).

Q: Are regulatory certifications identical between these parts?

A: Yes. Both FOD3181S and FOD3180S hold cUL and UL approvals, identical REACH status (REACH Unaffected), and matching export classification (EAR99).

Q: What is the isolation voltage rating for both parts?

A: Both the FOD3181S and FOD3180S maintain 5000Vrms isolation voltage, meeting high-voltage isolation requirements identically.

Q: Is the output supply voltage range the same for both components?

A: Yes. Both parts operate within the 10V ~ 20V output supply voltage range, ensuring circuit compatibility without power supply modifications.

Q: Why is FOD3180S preferred despite FOD3181S availability?

A: The FOD3181S is classified as obsolete, indicating discontinued production. The FOD3180S maintains active product status, ensuring long-term supply availability and manufacturing support from onsemi.