FSFR1700HSL Equivalent & Substitute Parts

Part Overview

The FSFR1700HSL 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 module with formed leads for through-hole mounting.

The FSFR1700HSL is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance where this component is specified in existing designs.

Substiute Parts

FSFR1700HSL

onsemiIn Stock: 2642FSFR1700HSL Datasheet

Current PartRFQ

FSFR1800HSL

Fairchild SemiconductorIn Stock: 16297FSFR1800HSL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FSFR1700HSL is determined by equivalence across the following critical parameters:

• Topology: Half-bridge converter architecture with isolated output
• Voltage Rating: 500V breakdown voltage with 10V ~ 25V supply range
• Switching Frequency: Up to 600kHz operational capability
• Power Capacity: 200W rating
• Duty Cycle: 50% fixed operation
• Protection Features: Current limiting, over-temperature, and over-voltage protection
• Package Type: 9-SIP module with through-hole mounting
• Thermal Range: -40°C to 130°C junction temperature

The FSFR1800HSL qualifies as a parametric equivalent based on matching half-bridge topology, isolated converter operation, and compatible electrical specifications within the allowed parameter set.

Parameter Comparison

Engineering Selection Recommendations

The FSFR1800HSL is available as an active product from Fairchild Semiconductor, whereas the FSFR1700HSL is obsolete. Both components maintain REACH Unaffected compliance status. The FSFR1800HSL offers supply chain continuity for applications currently specified with the FSFR1700HSL, provided that electrical and mechanical parameters align with design requirements.

Selection between these parts should be based on:

• Verification that package and pinout compatibility exist for through-hole mounting applications
• Confirmation that the FSFR1800HSL electrical specifications meet or exceed the design requirements of the original FSFR1700HSL specification
• Assessment of inventory availability and lead time requirements for production schedules

Frequently Asked Questions (FAQ)

Q: What makes the FSFR1800HSL a suitable substitute for the FSFR1700HSL?

A: Both components share half-bridge topology with isolated output, operate within compatible voltage ranges, and provide equivalent protection features. The FSFR1800HSL is an active product, addressing the obsolescence status of the FSFR1700HSL.

Q: Are there package compatibility concerns between these parts?

A: The FSFR1700HSL is specified as a 9-SIP module with formed leads for through-hole mounting. Package specifications for the FSFR1800HSL are not provided in the available data. Physical verification of package dimensions and pinout is required before substitution in existing PCB designs.

Q: What is the significance of the product status difference?

A: The FSFR1700HSL is obsolete, meaning onsemi no longer manufactures or supports this component. The FSFR1800HSL is active, ensuring ongoing availability, technical support, and compliance with current manufacturing standards.

Q: Do both parts meet the same compliance requirements?

A: Both the FSFR1700HSL and FSFR1800HSL maintain REACH Unaffected status. The FSFR1700HSL specifies MSL 1 (Unlimited), while the FSFR1800HSL MSL rating is vendor undefined. Compliance verification should be performed based on specific application requirements.

Q: Can I directly replace the FSFR1700HSL with the FSFR1800HSL in my design?

A: Substitution requires confirmation of electrical parameter equivalence and mechanical compatibility. Detailed datasheets for both components should be reviewed to ensure pinout alignment, thermal characteristics, and control signal compatibility with existing circuit designs.