TOP245P Equivalent & Substitute Parts

Part Overview

The TOP245P is an offline switch 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 power supplies, delivering 30 W output power with integrated fault protection including current limiting, over-temperature, and over-voltage functions.

The TOP245P is classified as Obsolete. Locating equivalent or substitute components is necessary for ongoing system support, maintenance, and new production requirements where legacy designs must be sustained or transitioned to current product lines.

Substiute Parts

TOP245P

Power IntegrationsIn Stock: 1456TOP245P Datasheet

Current PartRFQ

TOP245PN

Power IntegrationsIn Stock: 2075TOP245PN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TOP245P is determined by strict alignment with the following critical parameters:

Primary Substitution Criteria:

• Topology: Flyback converter architecture
• Output Isolation: Isolated configuration
• Voltage - Breakdown: 700V minimum rating
• Power Rating: 30 W nominal output
• Switching Frequency Range: 66kHz ~ 132kHz operation
• Package / Case: 8-DIP form factor with 7 leads
• Mounting Type: Through Hole compatibility
• Fault Protection: Current Limiting, Over Temperature, Over Voltage functions
• Control Features: Frequency Control capability

Direct Substitute Identified:

The TOP245PN is a direct substitute for the TOP245P. Both devices share identical electrical specifications, topology, power rating, switching frequency, operating temperature range, package configuration, and fault protection features. The primary distinction is packaging format (Tube for TOP245PN versus unspecified for TOP245P) and product status classification (Not For New Designs versus Obsolete).

Parameter Comparison

Engineering Selection Recommendations

TOP245PN as Direct Substitute:

The TOP245PN is electrically and mechanically equivalent to the TOP245P across all specified parameters. Selection of TOP245PN is appropriate for:

• Direct replacement in existing TOP245P designs requiring component replenishment
• Maintenance and repair applications where form-factor and electrical compatibility are required
• Transition scenarios where RoHS compliance is a secondary consideration

Compliance Considerations:

The TOP245P is RoHS non-compliant, while TOP245PN is RoHS Compliant. Both devices carry REACH Unaffected status and EAR99 export classification. Organizations subject to RoHS regulations should prioritize TOP245PN for new procurement activities.

Product Status Impact:

TOP245P is classified as Obsolete, indicating discontinued manufacturing and limited availability. TOP245PN is classified as Not For New Designs, indicating restricted use for new product development but continued support for legacy applications. For long-term supply chain planning, TOP245PN represents the more stable sourcing option within the TOPSwitch®-GX family.

Frequently Asked Questions (FAQ)

Q: Can TOP245PN be used as a direct replacement for TOP245P in existing circuit designs?

A: Yes. TOP245PN is electrically and mechanically equivalent to TOP245P. Both devices operate at identical switching frequencies (66kHz ~ 132kHz), deliver 30 W output power, feature 700V breakdown voltage, and provide identical fault protection. The 8-DIP through-hole package is identical, enabling direct PCB substitution without circuit modification.

Q: What is the primary difference between TOP245P and TOP245PN?

A: The primary differences are packaging format (Tube for TOP245PN), product status classification (Obsolete versus Not For New Designs), and RoHS compliance status (non-compliant versus compliant). Electrical and thermal specifications are identical.

Q: Is TOP245PN suitable for new product designs?

A: TOP245PN is classified as Not For New Designs. This classification indicates Power Integrations does not recommend this device for new development projects. For new designs, evaluation of current-generation TOPSwitch products is recommended.

Q: What are the critical parameters that determine substitution eligibility for TOP245P?

A: Substitution eligibility is determined by: flyback topology, isolated output configuration, 700V breakdown voltage rating, 30 W power delivery, 66kHz ~ 132kHz switching frequency range, 8-DIP through-hole package with 7 leads, integrated current limiting/over-temperature/over-voltage protection, and frequency control capability.

Q: Does TOP245PN require different PCB layout or thermal management compared to TOP245P?

A: No. Both devices share identical package dimensions (8-DIP, 0.300" spacing, 7.62mm pitch) and operating temperature range (-40°C ~ 150°C junction temperature). PCB layout, thermal design, and mounting procedures are directly transferable.

Q: What is the moisture sensitivity level for TOP245PN?

A: TOP245PN carries MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions for storage, handling, or reflow processing.