TOP246Y Equivalent & Substitute Parts

Part Overview

The TOP246Y is an offline flyback converter IC from Power Integrations' TOPSwitch®-GX series, designed for isolated power supply applications. This component integrates a high-voltage switch with control circuitry in a TO-220-7 package, delivering 125 W output power with integrated fault protection.

The TOP246Y is classified as Obsolete, which necessitates identification of equivalent substitute parts for ongoing production support and new design considerations. Substitute parts must maintain electrical and mechanical compatibility while meeting current compliance requirements.

Substiute Parts

TOP246Y

Power IntegrationsIn Stock: 1825TOP246Y Datasheet

Current PartRFQ

TOP246YN

Power IntegrationsIn Stock: 22608TOP246YN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TOP246Y is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Topology: Flyback converter architecture
• Output Isolation: Isolated configuration
• Voltage - Breakdown: 700V rating
• Power Output: 125 W capacity
• Switching Frequency: 66kHz ~ 132kHz range
• Duty Cycle: 66.5%
• Operating Temperature Range: -40°C ~ 150°C (TJ)
• Fault Protection: Current Limiting, Over Temperature, Over Voltage
• Control Features: Frequency Control

Mechanical Compatibility Requirements:

• Package / Case: TO-220-7 Formed Leads, 6 Leads
• Mounting Type: Through Hole
• Supplier Device Package: TO-220-7C

The TOP246YN qualifies as a direct substitute based on identical electrical specifications and mechanical packaging. Both parts belong to the TOPSwitch®-GX series and maintain the same functional parameters across all critical dimensions.

Parameter Comparison

Engineering Selection Recommendations

For Existing Production (Maintenance & Repair): The TOP246YN serves as the direct electrical and mechanical equivalent to the TOP246Y. Both parts maintain identical functional specifications across all critical parameters including topology, power rating, switching frequency, and thermal operating range. The TOP246YN is available in higher inventory quantities (22,534 pcs) compared to the TOP246Y (1,771 pcs).

Compliance Consideration: The TOP246Y is RoHS non-compliant, while the TOP246YN is RoHS Compliant. For applications subject to RoHS regulations, the TOP246YN is the appropriate selection. Both parts maintain REACH Unaffected status and identical ECCN/HTSUS classifications.

Product Status Impact: The TOP246Y is classified as Obsolete, indicating end-of-life status. The TOP246YN is classified as Not For New Designs, indicating limited availability for future production. For new design initiatives, evaluation of alternative TOPSwitch®-GX series members may be warranted, though such alternatives are not provided in the current substitution data.

Frequently Asked Questions (FAQ)

Q: Can TOP246YN be used as a direct replacement for TOP246Y in existing designs?

A: Yes. The TOP246YN is electrically and mechanically equivalent to the TOP246Y. All critical parameters—topology, power output, switching frequency, duty cycle, operating temperature range, package configuration, and fault protection features—are identical. Pin configuration and lead spacing in the TO-220-7 package are unchanged.

Q: What is the difference between TOP246Y and TOP246YN?

A: The primary differences are packaging format and compliance status. TOP246Y is supplied in standard packaging with RoHS non-compliant status. TOP246YN is supplied in Tube packaging and is RoHS Compliant. Electrical and thermal specifications are identical.

Q: Why is TOP246Y classified as Obsolete?

A: Obsolete classification indicates the part has reached end-of-life and is no longer in active production. The TOP246YN (Not For New Designs) represents the transition product. For long-term supply assurance, alternative solutions within the TOPSwitch®-GX series should be evaluated.

Q: Are there any thermal or electrical derating considerations when substituting TOP246YN for TOP246Y?

A: No. Both parts operate within the identical temperature range (-40°C ~ 150°C TJ) and maintain the same 125 W power rating, 700V breakdown voltage, and 66kHz ~ 132kHz switching frequency specification. No derating or design modification is required.

Q: What is the lead configuration for the TO-220-7 package?

A: The TO-220-7 package contains 6 functional leads in a formed-lead configuration, mounted through-hole. Pin assignments and spacing are identical between TOP246Y and TOP246YN.

Q: Is RoHS compliance a functional requirement for substitution?

A: RoHS compliance is a regulatory and supply-chain requirement, not a functional electrical requirement. The TOP246YN's RoHS Compliant status makes it the preferred choice for applications subject to RoHS regulations. Both parts are REACH Unaffected.