TOP247YN Equivalent & Substitute Parts

Part Overview

The TOP247YN is an offline flyback converter IC manufactured by Power Integrations, part of the TOPSwitch®-GX series. This device integrates a high-voltage power switch with control circuitry for isolated power supply applications. The TOP247YN operates at 66kHz to 132kHz switching frequency and delivers 165W output power in a TO-220-7C package with through-hole mounting.

The TOP247YN carries a "Not For New Designs" product status. This designation indicates the part remains available for existing applications and maintenance but is not recommended for new circuit development. Identifying equivalent and substitute parts is essential for design flexibility, supply chain continuity, and long-term product support.

Key Parameters

Parameter	Value
Manufacturer Part Number	TOP247YN
Manufacturer	Power Integrations
Series	TOPSwitch®-GX
Category	Power Management (PMIC)
Topology	Flyback
Voltage - Breakdown	700V
Frequency - Switching	66kHz ~ 132kHz
Power (Watts)	165W
Duty Cycle	66.5%
Output Isolation	Isolated
Fault Protection	Current Limiting, Over Temperature, Over Voltage
Control Features	Frequency Control
Package / Case	TO-220-7 Formed Leads, 6 Leads
Supplier Device Package	TO-220-7C
Mounting Type	Through Hole
Operating Temperature	-40°C ~ 150°C (TJ)
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitution of the TOP247YN is determined by strict alignment of electrical and mechanical parameters. The following criteria establish valid substitute relationships:

Primary Substitution Criteria:

Topology: Flyback (required match)
Voltage - Breakdown: 700V (required match)
Frequency - Switching: 66kHz ~ 132kHz (required match)
Output Isolation: Isolated (required match)
Package / Case: TO-220-7 Formed Leads, 6 Leads (required match)
Supplier Device Package: TO-220-7C (required match)
Mounting Type: Through Hole (required match)
Operating Temperature: -40°C ~ 150°C (TJ) (required match)
Fault Protection: Current Limiting, Over Temperature, Over Voltage (required match)

Secondary Substitution Criteria (Allowable Variation):

Power (Watts): May vary based on application requirements
Duty Cycle: May vary within TOPSwitch series design parameters
Series: TOPSwitch®-GX or TOPSwitch®-HX acceptable
Product Status: Active or Not For New Designs acceptable
Control Features: Frequency Control or equivalent control methodology acceptable

The TOP247YN has five parametric equivalents within the TOPSwitch®-GX series (TOP242YN, TOP243YN, TOP244YN, TOP245YN, TOP246YN) and one substitute from the TOPSwitch®-HX series (TOP258YN). These parts share identical electrical specifications except for power rating and series designation.

Parameter Comparison

Part Number	Series	Power (W)	Duty Cycle	Frequency (kHz)	Breakdown Voltage (V)	Package	Product Status	Inventory (Pcs)
TOP247YN	TOPSwitch®-GX	165	66.5%	66 ~ 132	700	TO-220-7C	Not For New Designs	34242
TOP258YN	TOPSwitch®-HX	195	78%	66, 132	700	TO-220-7C	Active	2108
TOP242YN	TOPSwitch®-GX	22	66.5%	66 ~ 132	700	TO-220-7C	Not For New Designs	3633
TOP243YN	TOPSwitch®-GX	45	66.5%	66 ~ 132	700	TO-220-7C	Not For New Designs	57300
TOP244YN	TOPSwitch®-GX	65	66.5%	66 ~ 132	700	TO-220-7C	Not For New Designs	3675
TOP245YN	TOPSwitch®-GX	85	66.5%	66 ~ 132	700	TO-220-7C	Not For New Designs	45400
TOP246YN	TOPSwitch®-GX	125	66.5%	66 ~ 132	700	TO-220-7C	Not For New Designs	22534

Engineering Selection Recommendations

For Existing Designs (Maintenance and Repair):

The TOP247YN remains available with substantial inventory (34,242 units). Continued use in existing applications is supported. All substitute parts listed maintain identical mechanical and thermal specifications, ensuring direct PCB compatibility without layout modifications.

For Power Rating Adjustments:

Applications requiring higher power output should select TOP258YN (195W, TOPSwitch®-HX series, Active status). This part provides increased power capacity while maintaining package compatibility and electrical interface equivalence. The TOPSwitch®-HX series represents current-generation technology with Active product status.

Applications requiring lower power output within the TOPSwitch®-GX series may select TOP242YN (22W), TOP243YN (45W), TOP244YN (65W), TOP245YN (85W), or TOP246YN (125W). These parts share identical control architecture and switching characteristics with the TOP247YN.

Compliance and Certification:

All listed substitute parts carry identical RoHS Compliance, Moisture Sensitivity Level (MSL 1 - Unlimited), REACH Unaffected status, and ECCN/HTSUS classifications. No additional compliance verification is required when substituting between listed parts.

Product Status Considerations:

TOP258YN carries Active product status, indicating ongoing manufacturer support and recommended use in new designs. All TOPSwitch®-GX variants (TOP242YN through TOP246YN) share "Not For New Designs" status with the TOP247YN, suitable for maintenance applications and existing product lines.

Frequently Asked Questions (FAQ)

Q: Can TOP247YN be directly replaced with TOP258YN on existing PCBs?

A: Yes. Both parts use identical TO-220-7C packaging with 6 formed leads and through-hole mounting. No PCB modifications are required. The TOP258YN provides higher power output (195W vs. 165W) and represents current-generation TOPSwitch®-HX technology with Active product status.

Q: What is the primary difference between TOPSwitch®-GX and TOPSwitch®-HX series?

A: The provided data indicates TOP258YN (TOPSwitch®-HX) operates at 78% duty cycle compared to 66.5% for TOPSwitch®-GX variants, and delivers higher power output (195W). Both series maintain identical 700V breakdown voltage, 66kHz to 132kHz switching frequency range, and TO-220-7C package specifications.

Q: Are lower-power TOPSwitch®-GX parts (TOP242YN, TOP243YN, TOP244YN, TOP245YN, TOP246YN) suitable substitutes for TOP247YN?

A: These parts are parametric equivalents sharing identical electrical specifications except power rating. Selection depends on application power requirements. Lower-power variants are not suitable if the application demands 165W output. Higher-power variants (TOP246YN at 125W) are insufficient for 165W applications.

Q: What inventory status should influence part selection?

A: TOP243YN shows highest inventory (57,300 units), followed by TOP245YN (45,400 units) and TOP247YN (34,242 units). TOP258YN shows limited inventory (2,108 units). For high-volume procurement, TOP243YN and TOP245YN offer superior supply availability within the TOPSwitch®-GX series.

Q: Do all substitute parts require identical PCB layout and thermal management?

A: Yes. All listed parts use TO-220-7 formed leads with 6-lead configuration and identical thermal characteristics (-40°C to 150°C operating range). PCB footprints, lead spacing, and thermal pad requirements remain unchanged across all substitutes.

Q: Is frequency control available on all substitute parts?

A: TOP247YN and all TOPSwitch®-GX variants (TOP242YN through TOP246YN) include Frequency Control as a control feature. TOP258YN (TOPSwitch®-HX) does not list Frequency Control in the provided specifications, indicating different control methodology.

Q: What fault protection features are common across all substitutes?

A: All listed parts provide identical fault protection: Current Limiting, Over Temperature, and Over Voltage protection. These protections are standard across both TOPSwitch®-GX and TOPSwitch®-HX series variants.

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