TOP246P Equivalent & Substitute Parts Reference

Part Overview

The TOP246P is an offline switch flyback converter IC from Power Integrations' TOPSwitch®-GX series, designed for isolated power supply applications. This 8-DIP package device operates at 66kHz to 132kHz switching frequency with 34W power capability and integrated current limiting, over-temperature, and over-voltage protection.

The TOP246P is classified as Obsolete. Locating equivalent or substitute components is necessary for ongoing production support, design updates, or inventory replenishment when original stock becomes unavailable.

Substiute Parts

TOP246P

Power IntegrationsIn Stock: 1216TOP246P Datasheet

Current PartRFQ

TOP246PN

Power IntegrationsIn Stock: 1567TOP246PN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TOP246P is determined by strict alignment with the following core parameters:

Primary Substitution Criteria:

• Topology: Flyback converter
• Output Isolation: Isolated
• Voltage - Breakdown: 700V
• Frequency - Switching: 66kHz ~ 132kHz
• Power (Watts): 34 W
• Duty Cycle: 66.5%
• Fault Protection: Current Limiting, Over Temperature, Over Voltage
• Control Features: Frequency Control
• Operating Temperature: -40°C ~ 150°C (TJ)
• Package / Case: 8-DIP (0.300", 7.62mm), 7 Leads
• Mounting Type: Through Hole

The TOP246PN qualifies as a direct substitute based on identical electrical specifications and package configuration. Both devices share the same base product number (TOP246) and are members of the TOPSwitch®-GX series.

Parameter Comparison

Engineering Selection Recommendations

TOP246PN as Direct Substitute:

The TOP246PN is electrically and mechanically identical to the TOP246P across all functional parameters. Both devices are 8-DIP through-hole packages with identical electrical specifications, operating ranges, and protection features.

Compliance Considerations:

The TOP246P carries RoHS non-compliant status, while the TOP246PN is RoHS Compliant. For applications subject to RoHS regulations or customer requirements mandating RoHS compliance, the TOP246PN is the appropriate selection.

Both parts maintain REACH Unaffected status and share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Product Status Impact:

The TOP246P is classified as Obsolete. The TOP246PN is classified as Not For New Designs. For new product development, neither part is recommended for initial design selection. However, for legacy system support, repair, or production continuation of existing designs, the TOP246PN provides the most direct functional replacement with improved compliance posture.

Frequently Asked Questions (FAQ)

Q: Can TOP246PN be used as a direct replacement for TOP246P in existing designs?

A: Yes. The TOP246PN is electrically and mechanically identical to the TOP246P. All electrical parameters, switching characteristics, protection features, and package dimensions are equivalent. Direct substitution is possible without circuit modification.

Q: What is the difference between TOP246P and TOP246PN?

A: The primary differences are packaging format (TOP246PN supplied in Tube) and RoHS compliance status (TOP246PN is RoHS Compliant; TOP246P is RoHS non-compliant). Electrical and functional specifications are identical.

Q: Why is TOP246P classified as Obsolete?

A: Obsolete status indicates the part is no longer in active production or recommended for new designs. The TOP246PN, classified as Not For New Designs, represents the current equivalent from Power Integrations' product line.

Q: Are there alternative topologies or manufacturers that can replace TOP246P?

A: The substitute list provided includes only TOP246PN as a direct equivalent. Other part numbers listed (TOP256PN, TOP244PN, TOP245PN, TOP242PN, NCP1079BAP130G) represent alternative devices within the TOPSwitch series or from other manufacturers. These alternatives have different electrical specifications and require circuit redesign evaluation.

Q: What mounting considerations apply when substituting TOP246PN for TOP246P?

A: Both parts use identical 8-DIP through-hole packaging with 0.300" (7.62mm) lead spacing. No PCB layout or mounting modifications are required for direct substitution.

Q: Is the TOP246PN suitable for new product designs?

A: The TOP246PN carries Not For New Designs status. For new product development, Power Integrations recommends evaluating current-generation TOPSwitch devices. The TOP246PN is appropriate for legacy system support and production continuation only.