FSFR1700HS Equivalent & Substitute Parts

Part Overview

The FSFR1700HS is an offline switch half-bridge integrated circuit manufactured by onsemi, designed for power management applications requiring isolated converter topologies. This component operates at switching frequencies up to 600kHz with a maximum power rating of 200W and is housed in a 9-SIP through-hole package.

The FSFR1700HS is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance or redesign initiatives.

Substiute Parts

FSFR1700HS

onsemiIn Stock: 7477FSFR1700HS Datasheet

Current PartRFQ

FSFR1800HSL

Fairchild SemiconductorIn Stock: 16297FSFR1800HSL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FSFR1700HS are identified based on the following critical parameters that determine functional compatibility:

• Topology: Half-Bridge converter architecture
• Output Isolation: Isolated configuration
• Voltage - Breakdown: 500V rating
• Voltage - Supply Range: 10V ~ 25V operating range
• Switching Frequency: Up to 600kHz capability
• Power Rating: 200W maximum power handling
• Fault Protection: Current Limiting, Over Temperature, Over Voltage protection features
• Package Type: 9-SIP through-hole module with formed leads
• Operating Temperature Range: -40°C ~ 130°C

The FSFR1800HSL qualifies as a parametric equivalent based on its half-bridge offline converter topology and isolated output configuration, meeting the core electrical and thermal requirements for direct substitution in applications designed for the FSFR1700HS.

Parameter Comparison

Engineering Selection Recommendations

The FSFR1800HSL is available as an active product from Fairchild Semiconductor, providing improved supply chain availability compared to the obsolete FSFR1700HS. Both components maintain REACH compliance and are unaffected by regulatory restrictions.

Selection of the FSFR1800HSL is supported by its active product status, which ensures continued manufacturing support and documentation availability. The MSL rating difference (1 versus Vendor Undefined) should be evaluated against specific storage and handling requirements for your application environment.

Frequently Asked Questions (FAQ)

Q: Can the FSFR1800HSL directly replace the FSFR1700HS in existing designs?

A: The FSFR1800HSL shares the same half-bridge isolated topology and operates within compatible electrical parameters. However, detailed datasheet comparison of pin configuration, timing characteristics, and control signal requirements is necessary before implementation in production designs.

Q: What is the primary reason for seeking a substitute for the FSFR1700HS?

A: The FSFR1700HS is classified as obsolete. The FSFR1800HSL provides an active alternative with equivalent functional topology and electrical characteristics.

Q: Are there package compatibility considerations between these parts?

A: Both components use through-hole SIP packaging. Verify pin count, lead spacing, and physical dimensions against your PCB layout before substitution.

Q: How do the manufacturers differ?

A: The FSFR1700HS is manufactured by onsemi, while the FSFR1800HSL is manufactured by Fairchild Semiconductor. Both manufacturers maintain REACH compliance for these components.

Q: What compliance certifications apply to both parts?

A: Both the FSFR1700HS and FSFR1800HSL maintain REACH Unaffected status, indicating compliance with European chemical safety regulations.