FSQ510MX Equivalent & Substitute Parts

Part Overview

The FSQ510MX is an offline switch flyback converter IC manufactured by onsemi, designed for isolated power management applications. This device operates in the FPS™ series and features a 700V breakdown voltage with integrated current limiting, overload, and over-temperature protection. The FSQ510MX is classified as obsolete, making identification of functionally equivalent substitute parts essential for design continuity and procurement planning.

Substiute Parts

FSQ510MX

onsemiIn Stock: 5624FSQ510MX Datasheet

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FSL206MRN

onsemiIn Stock: 20128FSL206MRN Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The FSL206MRN qualifies as a functional substitute for the FSQ510MX based on the following criteria:

Topology Compatibility: Both devices implement isolated flyback converter topology with integrated offline switching capability, enabling equivalent circuit-level functionality.

Electrical Operating Range: The FSL206MRN operates within a compatible supply voltage range (7V ~ 26V) that encompasses the FSQ510MX requirement (6.7V ~ 20V). The FSL206MRN's 650V breakdown voltage remains suitable for offline applications where the FSQ510MX's 700V rating is specified.

Protection Features: Both parts include current limiting, overload, and over-temperature fault protection. The FSL206MRN adds over-voltage protection, providing enhanced circuit safeguarding.

Compliance & Certification: Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory equivalence for procurement and deployment.

Power Rating Consideration: The FSL206MRN is rated for 12W output power, exceeding the FSQ510MX's 9W specification, allowing headroom for design margin.

Parameter Comparison

Engineering Selection Recommendations

Both the FSQ510MX and FSL206MRN are classified as obsolete products within the onsemi FPS™ series. Selection between these devices depends on circuit board design constraints and assembly capabilities.

Surface Mount Applications: The FSQ510MX's 7-LSOP surface mount package is appropriate for high-density PCB layouts. The FSL206MRN's 8-DIP through-hole package requires conventional PCB footprints and manual or selective wave soldering processes.

Regulatory Compliance: Both devices maintain ROHS3 compliance and REACH unaffected status, satisfying current environmental and hazardous substance directives for industrial and consumer applications.

Thermal Performance: The FSL206MRN extends the maximum junction temperature to 150°C compared to the FSQ510MX's 140°C, providing additional thermal margin in high-ambient-temperature environments.

Frequently Asked Questions (FAQ)

Q: Can FSL206MRN directly replace FSQ510MX in existing designs?

A: Functional substitution is possible based on topology, isolation, and protection feature equivalence. However, package differences (7-LSOP surface mount versus 8-DIP through-hole) require PCB redesign. Switching frequency differences (94.3kHz-132kHz versus 67kHz) may affect transformer design and EMI characteristics.

Q: What are the key electrical differences between these parts?

A: The FSL206MRN operates at a lower fixed switching frequency (67kHz) compared to the FSQ510MX's variable range (94.3kHz-132kHz). The FSL206MRN supports higher supply voltage (up to 26V versus 20V) and higher duty cycle (72% versus 60%), with increased power rating (12W versus 9W).

Q: Are both devices suitable for offline power supply applications?

A: Yes. Both devices feature isolated flyback topology with integrated offline switching, 700V and 650V breakdown voltages respectively, and comprehensive fault protection (current limiting, overload, over-temperature). The FSL206MRN adds over-voltage protection.

Q: What packaging considerations apply to substitution?

A: The FSQ510MX uses surface mount technology (7-LSOP), while FSL206MRN uses through-hole technology (8-DIP). Substitution requires complete PCB redesign, including footprint changes, trace routing modifications, and assembly process adjustments.

Q: Do both parts meet current regulatory requirements?

A: Both devices are ROHS3 compliant and REACH unaffected, meeting current environmental directives. However, both are classified as obsolete, requiring long-term supply chain planning for new designs.