TOP248Y Equivalent & Substitute Parts Reference

Part Overview

The TOP248Y is an offline flyback converter IC manufactured by Power Integrations, part of the TOPSwitch®-GX series. This device integrates a high-voltage power switch with control circuitry for isolated flyback topology applications, delivering 205 W of power with integrated fault protection including current limiting, over-temperature, and over-voltage functions.

The TOP248Y is classified as Obsolete. Locating equivalent or substitute components is necessary for ongoing production support, maintenance applications, and design continuity where this part number is specified in existing systems.

Substiute Parts

TOP248Y

Power IntegrationsIn Stock: 1461TOP248Y Datasheet

Current PartRFQ

TOP248YN

Power IntegrationsIn Stock: 5498TOP248YN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TOP248Y is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Topology: Flyback
• Output Isolation: Isolated
• Voltage - Breakdown: 700V
• Power Rating: 205 W
• Frequency - Switching: 66kHz ~ 132kHz
• Duty Cycle: 66.8%
• Operating Temperature Range: -40°C ~ 150°C (TJ)
• Package / Case: TO-220-7 Formed Leads, 6 Leads
• Mounting Type: Through Hole
• Fault Protection: Current Limiting, Over Temperature, Over Voltage
• Control Features: Frequency Control

The TOP248YN qualifies as a direct substitute based on identical electrical specifications and mechanical compatibility. Both parts belong to the TOPSwitch®-GX series and maintain the same functional characteristics required for offline flyback converter applications.

Parameter Comparison

Engineering Selection Recommendations

TOP248YN as Direct Substitute:

The TOP248YN provides functional and mechanical equivalence to the TOP248Y across all critical electrical parameters. The primary distinction is regulatory compliance: TOP248YN achieves RoHS Compliance, whereas TOP248Y is RoHS non-compliant. Both parts carry identical REACH Unaffected and EAR99 ECCN designations.

For applications requiring RoHS-compliant components, TOP248YN is the appropriate selection. For legacy systems or applications where RoHS compliance is not mandated, either part satisfies the electrical and thermal requirements.

Both parts are classified as end-of-life products (Obsolete and Not For New Designs, respectively), indicating limited future availability. Inventory considerations should factor into component procurement decisions.

Frequently Asked Questions (FAQ)

Q: Can TOP248YN replace TOP248Y in existing designs?

A: Yes. TOP248YN provides electrical and mechanical equivalence. All critical parameters including topology, power rating, switching frequency, voltage breakdown, operating temperature range, and package configuration are identical. The primary difference is RoHS compliance status.

Q: What is the difference between TOP248Y and TOP248YN?

A: Both parts are functionally equivalent TOPSwitch®-GX offline flyback converter ICs with 205 W power rating and 700V breakdown voltage. The TOP248YN is RoHS Compliant, while TOP248Y is RoHS non-compliant. TOP248YN is supplied in Tube packaging, whereas TOP248Y packaging is not specified in the provided data.

Q: Are there any thermal or electrical performance differences?

A: No. Both parts operate across the identical temperature range (-40°C ~ 150°C TJ) and maintain the same duty cycle (66.8%), switching frequency (66kHz ~ 132kHz), and fault protection features.

Q: Is the TO-220-7 package pinout identical between these parts?

A: Yes. Both parts use TO-220-7 Formed Leads with 6 leads and Through Hole mounting. Pin configuration and mechanical dimensions are equivalent.

Q: Should I use TOP248YN for new designs?

A: TOP248YN is classified as Not For New Designs. For new applications, consult Power Integrations documentation for current-generation alternatives within the TOPSwitch series that meet your specifications.

Q: What is the inventory status?

A: TOP248Y has 1356 Pcs New Original In Stock. TOP248YN has 5431 Pcs New Original In Stock, providing greater availability for immediate procurement needs.