TOP252PG Equivalent & Substitute Parts Reference

Part Overview

The TOP252PG is an offline switch flyback converter IC manufactured by Power Integrations, part of the TOPSwitch®-HX series. This 8-DIP through-hole component operates at 66 kHz switching frequency with 15 W power output capability and integrated 700V breakdown voltage protection. The device is designed for isolated flyback topology power supply applications with built-in current limiting, over-temperature, and over-voltage fault protection.

The TOP252PG is classified as Active product status with full RoHS compliance and REACH unaffected designation. Substitute parts within the TOPSwitch®-HX family are necessary when higher power output requirements exist or when alternative packaging formats are required for specific manufacturing processes.

Key Parameters

Parameter	Value
Manufacturer	Power Integrations
Series	TOPSwitch®-HX
Topology	Flyback
Output Isolation	Isolated
Voltage - Breakdown	700V
Frequency - Switching	66 kHz
Power (Watts)	15 W
Duty Cycle	78%
Package / Case	8-DIP (0.300", 7.62mm), 7 Leads
Mounting Type	Through Hole
Operating Temperature	-40°C ~ 150°C (TJ)
Fault Protection	Current Limiting, Over Temperature, Over Voltage
RoHS Status	RoHS Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts within the TOPSwitch®-HX family maintain electrical and mechanical compatibility based on the following criteria:

Common Parameters (All Substitutes):

Manufacturer: Power Integrations
Series: TOPSwitch®-HX
Topology: Flyback
Output Isolation: Isolated
Voltage - Breakdown: 700V
Frequency - Switching: 66 kHz
Duty Cycle: 78%
Package / Case: 8-DIP (0.300", 7.62mm), 7 Leads
Supplier Device Package: 8-PDIP-C
Mounting Type: Through Hole
Operating Temperature: -40°C ~ 150°C (TJ)
Fault Protection: Current Limiting, Over Temperature, Over Voltage
RoHS Status: RoHS Compliant
Product Status: Active
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Status: REACH Unaffected

Variable Parameter (Differentiator):

Power (Watts): Ranges from 15 W to 48 W across the substitute family

The TOP252PG can be substituted with higher-power variants when design requirements exceed 15 W output capacity. All substitute parts share identical package geometry, pinout configuration, switching frequency, and protection features, enabling direct board-level replacement with appropriate circuit design adjustments for increased power handling.

Parameter Comparison

Part Number	Packaging	Power (Watts)	Inventory (Pcs)	Product Status	RoHS Compliant
TOP252PG	DIP	15 W	968	Active	Yes
TOP252PN	Tube	15 W	16771	Active	Yes
TOP253PN	Tube	25 W	35300	Active	Yes
TOP254PN	Tube	28 W	20300	Active	Yes
TOP255PN	Tube	30 W	5619	Active	Yes
TOP256PN	Tube	34 W	19116	Active	Yes
TOP257PN	Tube	41 W	1308	Active	Yes
TOP258PN	Tube	48 W	25300	Active	Yes

Engineering Selection Recommendations

TOP252PN: Identical electrical specifications to TOP252PG with 15 W power output. Differs only in packaging format (Tube vs. DIP). Select when tube packaging is required for automated assembly processes. Higher inventory availability (16771 pcs) supports high-volume production.

TOP253PN through TOP258PN: Higher power-rated variants within the same TOPSwitch®-HX family. All maintain 700V breakdown voltage, 66 kHz switching frequency, 78% duty cycle, and identical package geometry. Selection depends on required power output:

TOP253PN: 25 W output
TOP254PN: 28 W output
TOP255PN: 30 W output
TOP256PN: 34 W output
TOP257PN: 41 W output
TOP258PN: 48 W output

All substitute parts carry Active product status with full RoHS compliance and REACH unaffected certification, ensuring regulatory compliance equivalent to the TOP252PG.

Frequently Asked Questions (FAQ)

Q: Can TOP252PN directly replace TOP252PG on existing PCBs?

A: TOP252PN shares identical electrical specifications and package pinout with TOP252PG. Both are 8-DIP through-hole components with 7 leads. The difference is packaging format (Tube vs. DIP). Direct PCB replacement is possible; verify your assembly process accommodates tube-packaged components.

Q: What determines compatibility between TOP252PG and higher-power variants?

A: Compatibility is determined by matching package geometry (8-DIP, 0.300" spacing), pinout configuration (7 leads), switching frequency (66 kHz), breakdown voltage (700V), and protection features (current limiting, over-temperature, over-voltage). Higher-power variants (TOP253PN through TOP258PN) maintain all these parameters while increasing power output capacity.

Q: Can I use TOP258PN (48 W) as a direct replacement for TOP252PG (15 W)?

A: TOP258PN shares identical package, pinout, switching frequency, and protection features with TOP252PG. However, circuit design modifications are required to utilize the increased power capability. The higher power rating does not automatically make it suitable for 15 W applications without design review.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts (TOP252PN, TOP253PN, TOP254PN, TOP255PN, TOP256PN, TOP257PN, TOP258PN) carry RoHS Compliant status and REACH Unaffected designation, matching the TOP252PG compliance profile.

Q: What is the difference between TOP252PG and TOP252PN packaging?

A: TOP252PG uses DIP packaging format; TOP252PN uses Tube packaging format. Both contain identical IC components with the same electrical specifications. Packaging selection depends on manufacturing process requirements and inventory management preferences.

Q: Which substitute part has the highest inventory availability?

A: TOP253PN maintains the highest inventory level at 35300 pieces, followed by TOP258PN at 25300 pieces. TOP257PN has the lowest inventory at 1308 pieces.

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