FSFR1600XS Equivalent & Substitute Parts

Part Overview

The FSFR1600XS is an offline switching half-bridge converter IC manufactured by onsemi, designed for isolated power management applications with up to 300kHz switching frequency and 160W power handling capability. The part operates with a 500V breakdown voltage and includes integrated fault protection features. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

FSFR1600XS

onsemiIn Stock: 4048FSFR1600XS Datasheet

Current PartRFQ

FSFR2100XS

onsemiIn Stock: 32784FSFR2100XS Datasheet

SimilarRFQ

FSFR1700XS

Fairchild SemiconductorIn Stock: 1584FSFR1700XS Datasheet

Parametric EquivalentRFQ

FSFR1700XSL

Fairchild SemiconductorIn Stock: 16531FSFR1700XSL Datasheet

Parametric EquivalentRFQ

FSFR1800XS

onsemiIn Stock: 6489FSFR1800XS Datasheet

Parametric EquivalentRFQ

FSFR1800XSL

Fairchild SemiconductorIn Stock: 2665FSFR1800XSL Datasheet

Parametric EquivalentRFQ

FSFR2100XSL

onsemiIn Stock: 1219FSFR2100XSL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FSFR1600XS are qualified based on the following critical parameters that determine functional compatibility:

Core Electrical Parameters (Must Match):

• Topology: Half-Bridge
• Voltage - Breakdown: 500V
• Voltage - Supply (Vcc/Vdd): 10V ~ 25V
• Voltage - Start Up: 12.5V
• Frequency - Switching: Up to 300kHz
• Duty Cycle: 50%
• Output Isolation: Isolated
• Internal Switch(s): Yes
• Fault Protection: Current Limiting, Over Temperature, Over Voltage
• Control Features: Frequency Control
• Operating Temperature: -40°C ~ 130°C (TJ)

Mechanical Parameters (Must Match):

• Package / Case: 10-SIP Module, 9 Leads, Formed Leads
• Mounting Type: Through Hole
• Supplier Device Package: 9-SIP

Variable Parameters (Allowed to Differ):

• Power (Watts): 160W baseline; substitutes range from 200W to 400W
• Manufacturer: onsemi or Fairchild Semiconductor
• Product Status: Obsolete or Active
• Packaging: Tube or unspecified
• Lead Forming: Standard or L-forming variant

All substitute parts maintain identical electrical specifications and package footprint compatibility while offering equal or higher power ratings and varying product availability status.

Parameter Comparison

Engineering Selection Recommendations

For Active Product Status Requirement: Select FSFR1700XS or FSFR1700XSL for designs requiring currently manufactured components. Both parts are classified as Active and maintain full electrical and mechanical compatibility with FSFR1600XS. FSFR1700XS offers standard lead forming, while FSFR1700XSL provides L-forming variant for specific PCB layout requirements. Both deliver 200W power rating, exceeding the 160W baseline.

For Higher Power Capacity: FSFR1800XS and FSFR2100XS provide 260W and 400W ratings respectively, suitable for applications requiring increased power headroom. FSFR1800XS is available from onsemi (Obsolete status), while FSFR2100XS offers the highest power capacity at 400W. FSFR2100XSL provides the L-forming variant of the 400W option.

For RoHS3 Compliance Assurance: All onsemi-manufactured parts (FSFR1600XS, FSFR1800XS, FSFR2100XS, FSFR2100XSL) carry explicit ROHS3 Compliant certification. Fairchild Semiconductor parts (FSFR1700XS, FSFR1700XSL, FSFR1800XSL) do not specify RoHS status in provided data.

For Lead Forming Variants: Standard forming: FSFR1700XS, FSFR1800XS, FSFR2100XS L-forming: FSFR1700XSL, FSFR1800XSL, FSFR2100XSL

Frequently Asked Questions (FAQ)

Q: Can FSFR1700XS directly replace FSFR1600XS in existing designs? A: Yes. FSFR1700XS maintains identical electrical specifications (500V breakdown, 10V-25V supply, 300kHz switching, 50% duty cycle, isolated output) and package footprint (10-SIP, 9 leads, through-hole). The 200W rating exceeds the 160W baseline, providing additional capacity margin.

Q: What is the difference between standard and L-forming lead variants? A: L-forming (XSL suffix) provides bent leads suitable for specific PCB mounting configurations. Standard forming (XS suffix) uses straight leads. Both variants maintain identical electrical performance and 9-SIP package compatibility. Selection depends on PCB layout and lead insertion requirements.

Q: Why are some substitute parts listed as Obsolete? A: Product status reflects manufacturer lifecycle classification at the time of data compilation. Obsolete parts may remain available through inventory channels. For new designs requiring long-term supply assurance, prioritize Active status parts: FSFR1700XS or FSFR1700XSL.

Q: Are all substitute parts ROHS3 compliant? A: onsemi-manufactured substitutes (FSFR1800XS, FSFR2100XS, FSFR2100XSL) carry explicit ROHS3 Compliant certification. Fairchild Semiconductor parts do not specify RoHS status in available documentation. Verify compliance requirements with component suppliers for Fairchild variants.

Q: What power rating should I select for my application? A: Select based on actual circuit power requirements with appropriate design margin. FSFR1700XS/FSFR1700XSL (200W) provides 25% headroom over FSFR1600XS baseline. FSFR1800XS (260W) and FSFR2100XS/FSFR2100XSL (400W) offer progressively higher capacity for demanding applications.

Q: Are there any differences in fault protection between substitute parts? A: All substitute parts include identical fault protection: Current Limiting, Over Temperature, and Over Voltage protection. Frequency Control is standard across all variants.

Q: Can I use FSFR2100XS in place of FSFR1600XS? A: Yes. FSFR2100XS maintains all core electrical and mechanical specifications while providing 400W power capacity. The higher rating introduces no compatibility issues for designs originally specified at 160W, though thermal management design may require adjustment for the increased power capability.