TOP262LN Equivalent & Substitute Parts Reference

Part Overview

The TOP262LN is an offline flyback converter IC from Power Integrations' TOPSwitch®-HX series, designed for isolated power supply applications. This component operates at 66kHz or 132kHz switching frequency with a maximum power rating of 244W and 700V breakdown voltage. The TOP262LN is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The TOPSwitch®-HX family provides a range of power-rated alternatives within the same topology and electrical specifications, enabling direct functional replacement in flyback converter circuits.

Key Parameters

Parameter	Value
Manufacturer	Power Integrations
Series	TOPSwitch®-HX
Topology	Flyback
Voltage - Breakdown	700V
Frequency - Switching	66kHz, 132kHz
Duty Cycle	78%
Power (Watts)	244W
Output Isolation	Isolated
Internal Switch(s)	Yes
Fault Protection	Current Limiting, Over Temperature, Over Voltage
Operating Temperature	-40°C ~ 150°C (TJ)
Package / Case	7-SSIP, 6 Leads, Exposed Pad, Formed Leads
Mounting Type	Through Hole
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution within the TOPSwitch®-HX family is determined by the following critical parameters that must remain constant across equivalent parts:

Fixed Parameters (Must Match):

Topology: Flyback
Voltage - Breakdown: 700V
Frequency - Switching: 66kHz, 132kHz
Duty Cycle: 78%
Output Isolation: Isolated
Internal Switch(s): Yes
Fault Protection: Current Limiting, Over Temperature, Over Voltage
Operating Temperature: -40°C ~ 150°C (TJ)
Package / Case: 7-SSIP, 6 Leads, Exposed Pad, Formed Leads
Mounting Type: Through Hole
RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Status: REACH Unaffected

Variable Parameter (Determines Power Rating):

Power (Watts): Ranges from 21W to 244W across the family

All substitute parts listed maintain identical electrical characteristics, protection features, and thermal specifications. The primary differentiator is the maximum power output capability, which scales across the product family. Selection of a substitute part depends on the actual power requirement of the target application.

Parameter Comparison

Part Number	Manufacturer	Series	Topology	Voltage - Breakdown	Frequency - Switching	Duty Cycle	Power (Watts)	Operating Temperature	Package / Case	Product Status	Inventory (Pcs)
TOP262LN	Power Integrations	TOPSwitch®-HX	Flyback	700V	66kHz, 132kHz	78%	244W	-40°C ~ 150°C	7-SSIP, 6 Leads, Exposed Pad	Obsolete	1900
TOP252EG	Power Integrations	TOPSwitch®-HX	Flyback	700V	66kHz, 132kHz	78%	21W	-40°C ~ 150°C	7-SSIP, 6 Leads, Exposed Pad	Active	696
TOP252EN	Power Integrations	TOPSwitch®-HX	Flyback	700V	66kHz, 132kHz	78%	21W	-40°C ~ 150°C	7-SSIP, 6 Leads, Exposed Pad	Active	5100
TOP253EG	Power Integrations	TOPSwitch®-HX	Flyback	700V	66kHz, 132kHz	78%	43W	-40°C ~ 150°C	7-SSIP, 6 Leads, Exposed Pad	Active	677
TOP253EN	Power Integrations	TOPSwitch®-HX	Flyback	700V	66kHz, 132kHz	78%	25W	-40°C ~ 150°C	7-SSIP, 6 Leads, Exposed Pad	Active	1177
TOP254EG	Power Integrations	TOPSwitch®-HX	Flyback	700V	66kHz, 132kHz	78%	62W	-40°C ~ 150°C	7-SSIP, 6 Leads, Exposed Pad	Active	16400
TOP254EN	Power Integrations	TOPSwitch®-HX	Flyback	700V	66kHz, 132kHz	78%	62W	-40°C ~ 150°C	7-SSIP, 6 Leads, Exposed Pad	Active	3834
TOP255EG	Power Integrations	TOPSwitch®-HX	Flyback	700V	66kHz, 132kHz	78%	81W	-40°C ~ 150°C	7-SSIP, 6 Leads, Exposed Pad	Active	8000
TOP255EN	Power Integrations	TOPSwitch®-HX	Flyback	700V	66kHz, 132kHz	78%	81W	-40°C ~ 150°C	7-SSIP, 6 Leads, Exposed Pad	Active	10037
TOP256EG	Power Integrations	TOPSwitch®-HX	Flyback	700V	66kHz, 132kHz	78%	119W	-40°C ~ 150°C	7-SSIP, 6 Leads, Exposed Pad	Active	1266
TOP256EN	Power Integrations	TOPSwitch®-HX	Flyback	700V	66kHz, 132kHz	78%	119W	-40°C ~ 150°C	7-SSIP, 6 Leads, Exposed Pad	Active	27159

Engineering Selection Recommendations

Product Status Consideration: The TOP262LN is classified as obsolete. All listed substitute parts are active products with current manufacturing support from Power Integrations. Selection of an active substitute ensures long-term availability and supply chain continuity.

Compliance and Certification: All substitute parts maintain identical compliance certifications:

RoHS Compliant
REACH Unaffected
Moisture Sensitivity Level 1 (Unlimited)
ECCN: EAR99
HTSUS: 8542.39.0001

These certifications are consistent across the entire TOPSwitch®-HX family, enabling direct substitution without regulatory or environmental compliance concerns.

Power Rating Selection: The TOP262LN operates at 244W maximum power output. For applications requiring the full 244W capability, no direct equivalent exists within the provided substitute list. The highest-rated active substitute is TOP256EN at 119W. Selection of a substitute part must account for the actual power requirement of the target application:

For applications requiring ≤21W: TOP252EG or TOP252EN
For applications requiring ≤43W: TOP253EG
For applications requiring ≤62W: TOP254EG or TOP254EN
For applications requiring ≤81W: TOP255EG or TOP255EN
For applications requiring ≤119W: TOP256EG or TOP256EN

Packaging and Mounting: All substitute parts use identical through-hole mounting with 7-SSIP package configuration, 6 leads, exposed pad, and formed leads. PCB layout and thermal management designs require no modification for substitution.

Frequently Asked Questions (FAQ)

Q: Can TOP262LN be directly replaced with any of the listed substitute parts?

A: Direct replacement depends on the power requirement of your application. All substitute parts share identical electrical characteristics, topology, voltage rating, switching frequency, duty cycle, protection features, and operating temperature range. The primary difference is maximum power output. If your application requires less than 119W, any substitute part rated at or above your power requirement can be used as a direct replacement. If your application requires the full 244W capability of the TOP262LN, no equivalent substitute exists in the provided list.

Q: What is the difference between TOP252EG and TOP252EN?

A: Both TOP252EG and TOP252EN are 21W-rated TOPSwitch®-HX devices with identical electrical specifications and package configuration. The primary difference is packaging format: TOP252EG is supplied in tube packaging, while TOP252EN is also supplied in tube packaging. Both are active products with current manufacturing support. Selection between these variants depends on your procurement and inventory management requirements.

Q: Are there any thermal or electrical performance differences between substitute parts?

A: No. All substitute parts operate within the same temperature range (-40°C to 150°C junction temperature), maintain identical 700V breakdown voltage, 78% duty cycle, 66kHz/132kHz switching frequency, and identical fault protection mechanisms (current limiting, over-temperature, over-voltage). The only performance variable is maximum power output capability, which scales across the product family.

Q: Can I use a lower-power substitute part in a high-power application?

A: No. Using a substitute part with a lower power rating than required by your application will result in thermal stress, reduced efficiency, and potential component failure. The power rating must equal or exceed the actual power demand of your circuit. Conversely, using a higher-rated part than required is acceptable from an electrical standpoint but may result in unnecessary cost.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed maintain RoHS Compliant status and REACH Unaffected classification, identical to the TOP262LN. No environmental or regulatory compliance modifications are required when substituting between these parts.

Q: What is the significance of the "EG" and "EN" suffixes in part numbers?

A: The suffix designates the packaging and lead configuration variant within the same electrical specification. Both EG and EN variants maintain identical electrical performance, topology, and protection features. Selection between variants is based on packaging format and procurement preferences rather than electrical functionality.

Q: Can PCB layout be reused when substituting TOP262LN with a lower-power alternative?

A: Yes. All substitute parts use the same 7-SSIP package with 6 leads, exposed pad, and formed leads. Pin configuration and through-hole mounting are identical, enabling direct PCB layout reuse. However, thermal management design should be reviewed to ensure adequate heat dissipation for the actual power level of the selected substitute part.

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