TOP258EG Equivalent & Substitute Parts

Part Overview

The TOP258EG is an offline switch flyback converter IC manufactured by Power Integrations, part of the TOPSwitch®-HX series. This isolated power management IC operates at 66kHz or 132kHz switching frequency with a 700V breakdown voltage rating and delivers 195W output power. The device integrates internal switching functionality with comprehensive fault protection including current limiting, over-temperature, and over-voltage protection. The TOP258EG is classified as Active product status and is RoHS compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are necessary when the original TOP258EG is unavailable due to inventory constraints, supply chain disruptions, or when alternative packaging formats are required for manufacturing flexibility. All substitute parts listed maintain electrical and mechanical compatibility within the TOPSwitch®-HX series.

Key Parameters

Parameter	TOP258EG Value
Manufacturer	Power Integrations
Series	TOPSwitch®-HX
Category	Power Management (PMIC)
Topology	Flyback
Output Isolation	Isolated
Voltage - Breakdown	700V
Frequency - Switching	66kHz, 132kHz
Power (Watts)	195 W
Duty Cycle	78%
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
Supplier Device Package	eSIP-7C
Mounting Type	Through Hole
Product Status	Active
RoHS Status	RoHS Compliant
MSL	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution within the TOPSwitch®-HX series is determined by the following critical parameters:

Electrical Compatibility Criteria:

Voltage - Breakdown: 700V (all substitutes maintain this rating)
Topology: Flyback (all substitutes use identical topology)
Output Isolation: Isolated (all substitutes provide isolation)
Frequency - Switching: 66kHz, 132kHz (all substitutes operate at these frequencies)
Duty Cycle: 78% (all substitutes maintain this specification)
Fault Protection: Current Limiting, Over Temperature, Over Voltage (all substitutes include identical protection)
Operating Temperature: -40°C ~ 150°C (TJ) (all substitutes maintain this range)

Mechanical Compatibility Criteria:

Package / Case: 7-SSIP, 6 Leads, Exposed Pad, Formed Leads (all substitutes use identical package)
Supplier Device Package: eSIP-7C (all substitutes use identical supplier package)
Mounting Type: Through Hole (all substitutes use through-hole mounting)

Regulatory & Compliance Criteria:

RoHS Status: RoHS Compliant (all substitutes are RoHS compliant)
MSL: 1 (Unlimited) (all substitutes maintain MSL 1)
REACH Status: REACH Unaffected (all substitutes maintain REACH unaffected status)
Product Status: Active (all substitutes are active products)

Variable Parameter:

Power (Watts): Ranges from 25W to 238W across the series

The TOP258EG operates at 195W. Substitutes are grouped by power rating capability. Parts with equal or greater power ratings can substitute the TOP258EG in applications where the full 195W capacity is required. Parts with lower power ratings are listed for reference but are not suitable as direct substitutes for 195W applications.

Parameter Comparison

Part Number	Manufacturer	Power (W)	Voltage Breakdown (V)	Switching Frequency (kHz)	Package	Operating Temp (°C)	Product Status	Inventory (Pcs)
TOP258EG	Power Integrations	195	700	66, 132	7-SSIP eSIP-7C	-40 ~ 150	Active	7870
TOP253EN	Power Integrations	25	700	66, 132	7-SSIP eSIP-7C	-40 ~ 150	Active	1177
TOP254EG	Power Integrations	62	700	66, 132	7-SSIP eSIP-7C	-40 ~ 150	Active	16400
TOP254EN	Power Integrations	62	700	66, 132	7-SSIP eSIP-7C	-40 ~ 150	Active	3834
TOP255EN	Power Integrations	81	700	66, 132	7-SSIP eSIP-7C	-40 ~ 150	Active	10037
TOP256EG	Power Integrations	119	700	66, 132	7-SSIP eSIP-7C	-40 ~ 150	Active	1266
TOP256EN	Power Integrations	119	700	66, 132	7-SSIP eSIP-7C	-40 ~ 150	Active	27159
TOP257EN	Power Integrations	157	700	66, 132	7-SSIP eSIP-7C	-40 ~ 150	Active	1436
TOP258EN	Power Integrations	195	700	66, 132	7-SSIP eSIP-7C	-40 ~ 150	Active	16620
TOP259EG	Power Integrations	238	700	66, 132	7-SSIP eSIP-7C	-40 ~ 150	Active	9200
TOP259EN	Power Integrations	238	700	66, 132	7-SSIP eSIP-7C	-40 ~ 150	Active	10100

Engineering Selection Recommendations

Direct Substitutes for TOP258EG (195W Applications):

TOP258EN is the direct equivalent to TOP258EG. Both parts deliver 195W output power with identical electrical and mechanical specifications. The primary difference is packaging format: TOP258EG is supplied in standard packaging while TOP258EN is supplied in tube packaging. Both maintain Active product status, RoHS compliance, and REACH unaffected status. TOP258EN has higher inventory availability (16,620 pcs vs. 7,870 pcs), making it the preferred substitute when packaging format flexibility is acceptable.

Higher Power Substitutes (195W+ Applications):

TOP259EG and TOP259EN both deliver 238W output power, exceeding the TOP258EG specification. These parts are suitable substitutes when the application requires additional power headroom or when future design scaling is anticipated. Both maintain identical electrical topology, frequency, voltage rating, and protection features. TOP259EN offers higher inventory (10,100 pcs) compared to TOP259EG (9,200 pcs).

Lower Power Alternatives (Reference Only):

TOP257EN (157W), TOP256EG/EN (119W), TOP255EN (81W), TOP254EG/EN (62W), and TOP253EN (25W) are listed for reference. These parts are not suitable as direct substitutes for 195W applications due to insufficient power rating. However, they may be used in applications with lower power requirements or as design alternatives where power reduction is acceptable.

Compliance & Regulatory Status:

All listed substitutes maintain identical compliance certifications: RoHS Compliant, REACH Unaffected, MSL 1 (Unlimited), and Active product status. No additional qualification or testing is required from a regulatory perspective when substituting between parts within this series.

Frequently Asked Questions (FAQ)

Q: Can TOP258EN directly replace TOP258EG in production?

A: Yes. TOP258EN is the direct electrical and mechanical equivalent to TOP258EG. Both deliver 195W output power with identical 700V breakdown voltage, 66kHz/132kHz switching frequency, and 7-SSIP eSIP-7C package. The only difference is packaging format (tube vs. standard). Both are Active status, RoHS compliant, and REACH unaffected. No design changes are required.

Q: What is the difference between TOP258EG and TOP258EN?

A: The electrical and mechanical specifications are identical. TOP258EG and TOP258EN differ only in supplier packaging format. TOP258EG uses standard packaging while TOP258EN uses tube packaging. Both are suitable for through-hole mounting and maintain the same performance characteristics.

Q: Can I use TOP259EG or TOP259EN instead of TOP258EG?

A: Yes, with design considerations. TOP259EG and TOP259EN deliver 238W output power, which exceeds the TOP258EG specification of 195W. These parts maintain identical electrical topology, voltage rating, switching frequency, and protection features. They are suitable substitutes when the application can accommodate higher power capability or when additional design margin is desired. No design changes to the PCB layout or package footprint are required.

Q: Why would I choose TOP259EN over TOP258EN?

A: TOP259EN provides 238W output power compared to TOP258EN's 195W. Selection depends on application power requirements. If the design requires exactly 195W, TOP258EN is appropriate. If the design requires higher power capacity or future scaling capability, TOP259EN is suitable. Both maintain identical package, frequency, voltage rating, and compliance status.

Q: Are lower power parts like TOP257EN suitable substitutes?

A: No. TOP257EN delivers 157W output power, which is below the TOP258EG specification of 195W. Using an undersized part would result in insufficient power delivery to the application. Lower power parts are listed for reference only and are suitable only for applications with lower power requirements.

Q: What packaging formats are available for 195W parts?

A: The TOP258 series at 195W power rating is available in two packaging formats: TOP258EG (standard packaging) and TOP258EN (tube packaging). Both use the 7-SSIP eSIP-7C package with 6 leads, exposed pad, and formed leads for through-hole mounting. The package footprint and electrical performance are identical.

Q: Do all substitutes maintain the same operating temperature range?

A: Yes. All listed substitutes maintain the operating temperature range of -40°C to 150°C (junction temperature). This specification is consistent across the entire TOPSwitch®-HX series presented.

Q: Are there any compliance differences between substitute parts?

A: No. All listed substitutes maintain identical compliance status: RoHS Compliant, REACH Unaffected, MSL 1 (Unlimited), and Active product status. No additional regulatory qualification is required when substituting between parts within this series.

Q: What is the switching frequency specification for all substitutes?

A: All substitutes operate at 66kHz or 132kHz switching frequency, identical to the TOP258EG. This dual-frequency capability is consistent across the entire TOPSwitch®-HX series.

Q: Can I mix TOP258EG and TOP258EN in the same production batch?

A: Yes. Both parts are electrically and mechanically identical with the same performance characteristics. The only difference is packaging format. Mixing is acceptable from an engineering perspective, though manufacturing processes may require separate handling based on packaging format.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message