TOP242Y Equivalent & Substitute Parts

Part Overview

The TOP242Y 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 22W output power with integrated fault protection.

The TOP242Y is classified as Obsolete. Locating equivalent substitute parts is necessary for ongoing production support, design updates, and inventory management where the original part is no longer available through standard distribution channels.

Substiute Parts

TOP242Y

Power IntegrationsIn Stock: 2052TOP242Y Datasheet

Current PartRFQ

TOP242YN

Power IntegrationsIn Stock: 3740TOP242YN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TOP242Y is determined by the following critical parameters:

Primary Substitution Criteria:

• Manufacturer: Power Integrations
• Series: TOPSwitch®-GX
• Topology: Flyback
• Output Isolation: Isolated
• Package / Case: TO-220-7 Formed Leads, 6 Leads
• Mounting Type: Through Hole
• Voltage - Breakdown: 700V
• Power (Watts): 22 W
• Frequency - Switching: 66kHz ~ 132kHz
• Duty Cycle: 66.5%
• Operating Temperature: -40°C ~ 150°C (TJ)
• Fault Protection: Current Limiting, Over Temperature, Over Voltage
• Control Features: Frequency Control

The TOP242YN qualifies as a direct substitute because it maintains identical electrical specifications, mechanical packaging, and functional characteristics. The primary difference is product status and RoHS compliance classification.

Parameter Comparison

Engineering Selection Recommendations

TOP242YN as Direct Substitute:

The TOP242YN is electrically and mechanically identical to the TOP242Y across all functional parameters. Selection of TOP242YN is appropriate when:

• Existing circuit designs require no modification
• PCB layouts and thermal management designs are compatible with TO-220-7 through-hole mounting
• RoHS compliance is required for the end application
• Supply chain availability of TOP242Y is exhausted

Product Status Consideration:

The TOP242Y carries Obsolete status, indicating discontinued production and limited availability. The TOP242YN carries Not For New Designs status, indicating it remains available but is not recommended for new product development. Both statuses reflect the maturity of the TOPSwitch®-GX series within Power Integrations' product portfolio.

Compliance and Certification:

TOP242YN provides RoHS Compliant certification, whereas TOP242Y is RoHS non-compliant. Both parts maintain identical REACH Unaffected and EAR99 ECCN classifications. Selection should align with end-product regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can TOP242YN be used as a direct replacement for TOP242Y in existing designs?

A: Yes. TOP242YN maintains identical electrical specifications, switching characteristics, fault protection features, and TO-220-7 package configuration. No circuit redesign is required.

Q: What is the difference between TOP242Y and TOP242YN?

A: The primary differences are product status classification and RoHS compliance. TOP242Y is Obsolete and RoHS non-compliant. TOP242YN is Not For New Designs and RoHS Compliant. All electrical and mechanical parameters are identical.

Q: Are there other substitute parts available from Power Integrations?

A: The TOP242YN datasheet references additional TOPSwitch®-GX series parts (TOP243YN, TOP244YN, TOP245YN, TOP246YN, TOP247YN). These parts differ in power rating, switching frequency, or duty cycle specifications and are not direct substitutes for the 22W, 66kHz-132kHz TOP242Y configuration.

Q: What packaging options are available for TOP242YN?

A: TOP242YN is supplied in Tube packaging. The TO-220-7C supplier device package remains consistent with TOP242Y specifications.

Q: Is thermal management identical between TOP242Y and TOP242YN?

A: Yes. Both parts operate across -40°C to 150°C junction temperature range and share identical TO-220-7 package thermal characteristics. Existing heatsink and thermal design calculations remain valid.

Q: What inventory status should be considered for procurement?

A: TOP242Y shows 1968 Pcs in stock (Obsolete status). TOP242YN shows 3633 Pcs in stock (Not For New Designs status). TOP242YN represents the more readily available option for immediate procurement needs.