TOP242GN Equivalent & Substitute Parts

Part Overview

The TOP242GN is an offline switch flyback converter IC manufactured by Power Integrations, part of the TOPSwitch®-GX series. This device functions as a high-voltage integrated power supply controller designed for isolated flyback topology applications with 15W power output capability. The TOP242GN operates at switching frequencies between 66kHz and 132kHz and integrates internal protection features including current limiting, over-temperature, and over-voltage protection.

The TOP242GN has been discontinued at DiGi Electronics. Due to this discontinuation status, identifying functionally equivalent substitute parts is necessary for ongoing design support, production continuity, and component sourcing in applications currently utilizing this device.

Substiute Parts

TOP242GN

Power IntegrationsIn Stock: 1473TOP242GN Datasheet

Current PartRFQ

TOP242GN-TL

Power IntegrationsIn Stock: 23383TOP242GN-TL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TOP242GN is determined by strict alignment with the following critical parameters:

Primary Substitution Criteria:

• Manufacturer: Power Integrations
• Series: TOPSwitch®-GX
• Topology: Flyback
• Output Isolation: Isolated
• Voltage - Breakdown: 700V
• Frequency - Switching: 66kHz ~ 132kHz
• Power (Watts): 15 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-SMD (7 Leads), Gull Wing
• Supplier Device Package: SMD-8B
• Mounting Type: Surface Mount
• RoHS Status: RoHS Compliant
• Moisture Sensitivity Level (MSL): 4 (72 Hours)

The TOP242GN-TL is identified as a direct substitute. Both devices share identical electrical specifications, thermal operating range, protection features, and physical packaging. The primary distinction is packaging format: TOP242GN-TL is supplied in Cut Tape (CT) format, whereas the original TOP242GN packaging format is not specified in the provided data.

Parameter Comparison

Engineering Selection Recommendations

TOP242GN-TL as Direct Substitute:

The TOP242GN-TL is electrically and mechanically equivalent to the TOP242GN across all specified parameters. Both devices are RoHS Compliant, REACH Unaffected, and classified under ECCN EAR99 with identical HTSUS codes. The devices share identical thermal operating ranges, protection mechanisms, and control features.

The TOP242GN-TL is currently marked as "Not For New Designs," indicating Power Integrations has transitioned this product line. However, for applications requiring direct replacement of existing TOP242GN components, the TOP242GN-TL provides functional equivalence with higher current inventory availability (23,300 pcs versus 1,415 pcs).

Compliance Considerations:

Both devices maintain RoHS compliance and REACH unaffected status, supporting continued use in regulated applications. Moisture sensitivity level MSL-4 (72 Hours) applies to both variants, requiring appropriate handling and storage protocols during manufacturing.

Packaging and Supply Chain:

The TOP242GN-TL is supplied in Cut Tape (CT) format, which may require tape-to-tray conversion or direct use in automated pick-and-place systems depending on assembly line configuration. Verify packaging compatibility with existing manufacturing processes before component selection.

Frequently Asked Questions (FAQ)

Q: Can TOP242GN-TL be used as a direct replacement for TOP242GN in existing designs?

A: Yes. The TOP242GN-TL is electrically and mechanically equivalent across all specified parameters including voltage breakdown, switching frequency, power output, protection features, and thermal operating range. The primary difference is packaging format (Cut Tape versus unspecified format). Verify packaging compatibility with your assembly process.

Q: What is the difference between TOP242GN and TOP242GN-TL?

A: Both devices are identical in electrical specifications and physical package dimensions (8-SMD, 7 Leads, Gull Wing). The TOP242GN-TL is supplied in Cut Tape (CT) packaging format. The TOP242GN-TL has higher inventory availability and is marked "Not For New Designs," while the TOP242GN is marked "Discontinued at DiGi Electronics."

Q: Are there other TOPSwitch®-GX series alternatives to TOP242GN?

A: The TOP242GN-TL datasheet references additional TOPSwitch®-GX variants (TOP246GN-TL, TOP245GN-TL, TOP252GN-TL, TOP244GN-TL, TOP243GN-TL) as substitutes. However, these alternatives are not included in the provided input parameters and therefore cannot be evaluated for substitution eligibility based on the specified criteria.

Q: What is the MSL-4 moisture sensitivity requirement?

A: Moisture Sensitivity Level 4 (72 Hours) specifies that the component must be used within 72 hours of opening the original moisture-barrier packaging. After this period, the device must be baked according to IPC-A-2.1 standards before assembly to prevent moisture-induced failures during reflow soldering.

Q: Is TOP242GN-TL suitable for new product designs?

A: The TOP242GN-TL is marked "Not For New Designs," indicating Power Integrations recommends against using this device in new applications. For new designs, consult Power Integrations documentation for current-generation alternatives within the TOPSwitch®-GX or successor series.

Q: What compliance certifications apply to both devices?

A: Both TOP242GN and TOP242GN-TL are RoHS Compliant, REACH Unaffected, and classified under ECCN EAR99 with HTSUS code 8542.39.0001. These certifications support use in regulated markets and applications with environmental compliance requirements.