FSFR1800XC Equivalent & Substitute Parts

Part Overview

The FSFR1800XC is an offline switch IC manufactured by onsemi, designed for power management applications in converter offline topology configurations. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system support and new design implementations. The FSFR1800XC operates as a half-bridge offline switch, serving critical functions in isolated power conversion circuits where component availability has become limited.

Substiute Parts

FSFR1800XC

onsemiIn Stock: 2182FSFR1800XC Datasheet

Current PartRFQ

FSFR1800XCL

Fairchild SemiconductorIn Stock: 8984FSFR1800XCL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FSFR1800XC are identified based on the following critical parameters that determine functional compatibility:

• Base Product Number alignment (FSFR1800 series)
• Functional category (Power Management PMIC)
• Application topology (Converter Offline Topology)
• Device type (IC Offline Switch Half Bridge)

The FSFR1800XCL qualifies as a direct substitute based on matching base product number, identical functional category, and equivalent offline converter topology application. Both components serve the same role in half-bridge offline switch configurations.

Parameter Comparison

Engineering Selection Recommendations

The FSFR1800XCL represents the primary substitute for the obsolete FSFR1800XC. Selection of this substitute is supported by the following factors:

• Both components share the FSFR1800 base product number, indicating core design compatibility
• Active product status of the FSFR1800XCL ensures ongoing availability and manufacturing support
• Identical functional application in converter offline topology configurations
• ECCN classification of EAR99 for the substitute part provides standard export compliance status, compared to the obsolete designation of the original part
• Moisture Sensitivity Level (MSL) rating of 3 (168 Hours) for the substitute part establishes defined handling requirements for manufacturing environments

Frequently Asked Questions (FAQ)

Q: Why is the FSFR1800XC classified as obsolete? A: The FSFR1800XC has reached end-of-life status with onsemi. The FSFR1800XCL, manufactured by Fairchild Semiconductor, continues active production and serves the same offline switch half-bridge function.

Q: What are the key compatibility criteria between FSFR1800XC and FSFR1800XCL? A: Both components share the FSFR1800 base product number and are designed for identical converter offline topology applications. They function as half-bridge offline switches within power management circuits.

Q: Are there packaging differences between these parts? A: Packaging information is not specified in the technical parameters for either component. Verification of physical package compatibility is required during design integration.

Q: What is the significance of the MSL rating for FSFR1800XCL? A: The Moisture Sensitivity Level 3 (168 Hours) rating for FSFR1800XCL defines the maximum time the component can be exposed to ambient conditions (30°C, 60% relative humidity) before requiring baking prior to soldering.

Q: How does the product status difference affect component selection? A: The active status of FSFR1800XCL ensures continued manufacturing, technical support, and supply chain availability, whereas the obsolete status of FSFR1800XC indicates no further production or support from onsemi.