TOP253PG Equivalent & Substitute Parts

Part Overview

The TOP253PG 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 25 W power output capability and integrated 700V breakdown voltage protection. The device is Active status and RoHS Compliant, designed for isolated flyback topology power management applications requiring current limiting, over-temperature, and over-voltage fault protection.

Substitute parts are necessary when the original TOP253PG is unavailable, when alternative power ratings are required for design optimization, or when different packaging formats (tube vs. standard) are preferred for manufacturing processes.

Substiute Parts

TOP253PG

Power IntegrationsIn Stock: 1042TOP253PG Datasheet

Current PartRFQ

TOP252PN

Power IntegrationsIn Stock: 16863TOP252PN Datasheet

Parametric EquivalentRFQ

TOP253PN

Power IntegrationsIn Stock: 35327TOP253PN Datasheet

Parametric EquivalentRFQ

TOP254PN

Power IntegrationsIn Stock: 20365TOP254PN Datasheet

Parametric EquivalentRFQ

TOP255PN

Power IntegrationsIn Stock: 5712TOP255PN Datasheet

Parametric EquivalentRFQ

TOP256PN

Power IntegrationsIn Stock: 19162TOP256PN Datasheet

Parametric EquivalentRFQ

TOP257PN

Power IntegrationsIn Stock: 1358TOP257PN Datasheet

Parametric EquivalentRFQ

TOP258PN

Power IntegrationsIn Stock: 25324TOP258PN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for TOP253PG is determined by strict adherence to the following parameters:

Fixed Parameters (Non-Negotiable for Substitution):

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

Variable Parameter (Allows Substitution):

• Power (Watts): Range from 15 W to 48 W across the TOPSwitch®-HX series

All substitute parts listed maintain identical electrical characteristics, thermal specifications, protection features, and compliance certifications. The primary differentiator is power output rating, which scales within the same IC family while preserving all other functional parameters.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are Active status components manufactured by Power Integrations and maintain full RoHS Compliance and REACH Unaffected certification status. Selection between TOP253PG and substitute parts should be based on power output requirements:

Direct Equivalent (Same Power Rating): TOP253PN is the direct parametric equivalent to TOP253PG, offering identical 25 W power output. The primary difference is packaging format: TOP253PN is supplied in tube packaging, while TOP253PG uses standard packaging. Both maintain identical electrical and thermal specifications.

Lower Power Requirement: TOP252PN (15 W) is suitable for applications requiring reduced power output while maintaining all other electrical characteristics and protection features of the TOP253PG topology.

Higher Power Requirements: TOP254PN (28 W), TOP255PN (30 W), TOP256PN (34 W), TOP257PN (41 W), and TOP258PN (48 W) provide progressively higher power output ratings within the same TOPSwitch®-HX family, maintaining identical switching frequency, breakdown voltage, duty cycle, and thermal operating range.

All substitute parts are Active status products with unlimited moisture sensitivity level (MSL 1), ensuring compatibility with standard manufacturing and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can TOP253PN be used as a direct replacement for TOP253PG?

A: Yes. TOP253PN is a parametric equivalent with identical power output (25 W), voltage breakdown (700V), switching frequency (66 kHz), duty cycle (78%), operating temperature range (-40°C ~ 150°C), package configuration (8-DIP, 7 Leads), and fault protection features. The difference is packaging format: TOP253PN is tube-packaged while TOP253PG uses standard packaging. Both are Active status, RoHS Compliant, and REACH Unaffected.

Q: What is the difference between TOP253PG and TOP254PN?

A: The primary difference is power output: TOP253PG is rated at 25 W while TOP254PN is rated at 28 W. All other parameters are identical, including voltage breakdown (700V), switching frequency (66 kHz), duty cycle (78%), operating temperature (-40°C ~ 150°C), package type (8-DIP, 7 Leads), and protection features. TOP254PN is suitable for applications requiring higher power capacity within the same topology.

Q: Can I substitute TOP252PN for TOP253PG?

A: TOP252PN is a parametric equivalent within the TOPSwitch®-HX series with all identical specifications except power output: TOP252PN is rated at 15 W compared to TOP253PG at 25 W. Substitution is valid only if the application power requirement does not exceed 15 W. All other electrical characteristics, thermal range, package configuration, and protection features are identical.

Q: What packaging formats are available for TOP253 equivalents?

A: TOP253PG uses standard packaging, while TOP253PN uses tube packaging. Both maintain identical electrical specifications and are suitable for through-hole mounting on 0.300" (7.62mm) pitch PCB layouts. Packaging selection depends on manufacturing process requirements and component handling procedures.

Q: Are all substitute parts RoHS Compliant?

A: Yes. All substitute parts listed (TOP252PN through TOP258PN) are RoHS Compliant and REACH Unaffected, matching the compliance status of TOP253PG. All components maintain Moisture Sensitivity Level 1 (Unlimited).

Q: What is the power output range for TOPSwitch®-HX series substitutes?

A: The available power output range spans from 15 W (TOP252PN) to 48 W (TOP258PN). All variants maintain identical switching frequency (66 kHz), voltage breakdown (700V), duty cycle (78%), and operating temperature range (-40°C ~ 150°C).

Q: Can TOP258PN replace TOP253PG in all applications?

A: TOP258PN (48 W) is a higher-power variant of the same TOPSwitch®-HX family with identical electrical characteristics except power output. Substitution is valid from an electrical compatibility standpoint, as all core parameters match. However, thermal design and PCB layout considerations may differ due to increased power dissipation.