FSQ0565RSWDTU Equivalent & Substitute Parts

Part Overview

The FSQ0565RSWDTU is an offline switching controller IC manufactured by onsemi, designed for flyback converter topologies. This device operates in the 48kHz to 67kHz switching frequency range and delivers 80W of power with integrated current limiting, overload, over-temperature, over-voltage, and short-circuit protection. The part is packaged in TO-220-6 with formed leads for through-hole mounting.

The FSQ0565RSWDTU is classified as obsolete. Equivalent substitute parts are available to maintain design continuity and ensure supply chain reliability for applications requiring offline flyback power conversion with isolated output topology.

Substiute Parts

FSQ0565RSWDTU

onsemiIn Stock: 8254FSQ0565RSWDTU Datasheet

Current PartRFQ

FSQ0565RQWDTU

Fairchild SemiconductorIn Stock: 1559FSQ0565RQWDTU Datasheet

Parametric EquivalentRFQ

FSQ0765RQWDTU

onsemiIn Stock: 4395FSQ0765RQWDTU Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FSQ0565RSWDTU is determined by the following critical parameters:

• Topology: Flyback converter architecture
• Output Isolation: Isolated output configuration
• Voltage - Breakdown: 650V rating
• Voltage - Supply (Vcc/Vdd): 8V ~ 20V input range
• Frequency - Switching: 48kHz ~ 67kHz operating band
• Fault Protection: Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit
• Package / Case: TO-220-6 Full Pack with Formed Leads
• Mounting Type: Through Hole

The FSQ0565RSWDTU has two qualified substitute parts: FSQ0565RQWDTU and FSQ0765RQWDTU. Both maintain identical topology, isolation, voltage ratings, switching frequency, protection features, and package specifications. The FSQ0765RQWDTU variant provides increased power handling at 90W compared to the 80W rating of the FSQ0565RSWDTU.

Parameter Comparison

Engineering Selection Recommendations

FSQ0565RQWDTU: This substitute is the primary equivalent for direct replacement. It maintains all electrical and mechanical parameters identical to the FSQ0565RSWDTU and carries Active product status, ensuring long-term availability and supply chain stability. This part is manufactured by Fairchild Semiconductor and is supplied in Bulk packaging.

FSQ0765RQWDTU: This substitute provides increased power handling capability at 90W, compared to the 80W rating of the FSQ0565RSWDTU. All other electrical and mechanical parameters remain identical. This part is manufactured by onsemi and is supplied in Tube packaging. The FSQ0765RQWDTU is classified as Obsolete.

For applications requiring the exact 80W power specification, FSQ0565RQWDTU is the recommended selection due to its Active product status. For applications that can accommodate higher power capability, FSQ0765RQWDTU provides additional headroom within the same package and topology constraints.

Frequently Asked Questions (FAQ)

Q: Can FSQ0565RQWDTU be used as a direct replacement for FSQ0565RSWDTU?

A: Yes. FSQ0565RQWDTU is a parametric equivalent with identical topology, voltage ratings, switching frequency, fault protection, operating temperature range, and TO-220-6 package configuration. The primary advantage is Active product status, ensuring continued availability.

Q: What is the difference between FSQ0565RQWDTU and FSQ0765RQWDTU?

A: Both parts share identical topology, isolation, voltage ratings, switching frequency, protection features, and package specifications. The FSQ0765RQWDTU provides 90W power handling versus 80W for the FSQ0565RQWDTU. Selection depends on application power requirements.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the TO-220-6 Full Pack with Formed Leads package configuration and are mounted through-hole. Pin compatibility is maintained across all substitutes.

Q: What compliance certifications apply to these parts?

A: FSQ0565RSWDTU and FSQ0765RQWDTU are ROHS3 Compliant. All three parts carry EAR99 ECCN classification and HTSUS code 8542.39.0001. FSQ0565RQWDTU compliance details are not specified in available documentation.

Q: Why is FSQ0565RSWDTU classified as Obsolete?

A: The FSQ0565RSWDTU is listed as Obsolete by the manufacturer. FSQ0565RQWDTU (Active status) is the recommended substitute for new designs and ongoing production requirements.

Q: Can these parts be used in isolated flyback converter applications?

A: Yes. All three parts are designed for offline flyback converter topologies with isolated output configuration, operating at 48kHz to 67kHz switching frequency with 650V breakdown voltage rating.