STR-Y6754 Equivalent & Substitute Parts

Part Overview

The STR-Y6754 is an offline switching flyback converter IC manufactured by Sanken Electric USA Inc., designed for isolated power supply applications. This component operates in the 18.4kHz to 24.4kHz switching frequency range with a maximum power rating of 120W and supports input voltage ranges from 9.4V to 35V. The device is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production support.

Substiute Parts

STR-Y6754

Sanken Electric USA Inc.In Stock: 875STR-Y6754 Datasheet

Current PartRFQ

TOP246YN

Power IntegrationsIn Stock: 22608TOP246YN Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the STR-Y6754 is determined by the following critical parameters:

Primary Substitution Criteria:

• Topology: Flyback converter architecture
• Output Isolation: Isolated configuration
• Internal Switch(s): Integrated switching element
• Package / Case: TO-220-7 Formed Leads (mechanical compatibility)
• Mounting Type: Through Hole
• Fault Protection: Current Limiting, Over Temperature, Over Voltage capabilities

Secondary Compatibility Parameters:

• Voltage - Breakdown: Minimum 650V (equal or higher acceptable)
• Power Rating: 120W nominal (equal or higher acceptable)
• Operating Temperature Range: Must encompass or exceed -20°C ~ 115°C
• RoHS Compliance: Required for regulatory alignment

The TOP246YN from Power Integrations meets these substitution criteria through identical package configuration, matching topology, isolated output architecture, and equivalent fault protection mechanisms. Both devices support through-hole mounting and maintain RoHS compliance.

Parameter Comparison

Engineering Selection Recommendations

The TOP246YN serves as a direct functional substitute for the STR-Y6754 based on matching package geometry, identical topology classification, and equivalent isolation architecture. Both devices maintain RoHS compliance and support through-hole PCB assembly methods.

The TOP246YN demonstrates superior voltage breakdown rating (700V versus 650V), providing enhanced margin for transient voltage conditions. Power capacity is equivalent at 125W versus 120W. The extended operating temperature range of the TOP246YN (-40°C to 150°C) exceeds the STR-Y6754 specification, accommodating broader environmental deployment scenarios.

The switching frequency differential (66kHz–132kHz for TOP246YN versus 18.4kHz–24.4kHz for STR-Y6754) reflects architectural differences in the control topology. This parameter requires circuit-level evaluation to confirm compatibility with existing transformer design and EMI filtering specifications.

Both devices carry product status designations indicating limited availability for new production. The TOP246YN is classified as "Not For New Designs," while the STR-Y6754 is obsolete. Component selection should prioritize long-term supply chain viability and design lifecycle requirements.

Frequently Asked Questions (FAQ)

Q: Can the TOP246YN directly replace the STR-Y6754 without PCB modifications?

A: Package compatibility is confirmed through identical TO-220-7 Formed Leads configuration and through-hole mounting. However, the switching frequency difference (66kHz–132kHz versus 18.4kHz–24.4kHz) may require transformer and filter component re-evaluation to maintain EMI performance and efficiency targets.

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

A: The TOP246YN provides higher voltage breakdown (700V versus 650V) and extended operating temperature range (-40°C to 150°C versus -20°C to 115°C). Switching frequency operates at significantly higher rates in the TOP246YN. Power ratings are equivalent at 120W and 125W respectively.

Q: Are both devices RoHS compliant?

A: Yes, both the STR-Y6754 and TOP246YN maintain RoHS compliance status.

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

A: The STR-Y6754 is classified as obsolete, indicating discontinued production and limited inventory availability. The TOP246YN is designated "Not For New Designs," indicating the manufacturer recommends alternative solutions for new product development. Both statuses reflect component lifecycle maturity and supply chain considerations.

Q: Does the fault protection feature set differ between these devices?

A: The STR-Y6754 includes Over Load protection in addition to Current Limiting, Over Temperature, and Over Voltage protection. The TOP246YN provides Current Limiting, Over Temperature, and Over Voltage protection. The absence of discrete Over Load protection in the TOP246YN may require external circuit implementation depending on application requirements.