FSL106HR Equivalent & Substitute Parts

Part Overview

The FSL106HR is an offline switch flyback converter IC manufactured by onsemi, designed for isolated power management applications. This 8-DIP package device operates at 100kHz switching frequency with 13W power output and integrated fault protection including current limiting, overload, overtemperature, overvoltage, and short circuit protection. The FSL106HR is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support.

Substiute Parts

FSL106HR

onsemiIn Stock: 35306FSL106HR Datasheet

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NCP1075AAP100G

onsemiIn Stock: 908NCP1075AAP100G Datasheet

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NCP1075ABP100G

onsemiIn Stock: 1058NCP1075ABP100G Datasheet

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NCP1075BAP100G

onsemiIn Stock: 1376NCP1075BAP100G Datasheet

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FSL116HR

onsemiIn Stock: 36438FSL116HR Datasheet

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FSL136HR

onsemiIn Stock: 2076FSL136HR Datasheet

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NCP1075BBP100G

onsemiIn Stock: 1103NCP1075BBP100G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the FSL106HR is determined by the following critical parameters: flyback topology, isolated output configuration, 100kHz switching frequency, 8-DIP through-hole package compatibility, and fault protection capabilities. Substitute parts must maintain electrical compatibility within the specified voltage supply range and switching frequency while supporting equivalent or higher power ratings.

Two substitution categories are identified:

Parametric Equivalents (FPS™ Series): FSL116HR and FSL136HR maintain identical topology, switching frequency, package, and voltage breakdown rating (650V). These parts share the same supply voltage range (8V ~ 26V) and duty cycle (77%), with higher power ratings (16W and 26W respectively).

Functional Equivalents (NCP1075 Series): NCP1075AAP100G, NCP1075ABP100G, NCP1075BAP100G, and NCP1075BBP100G provide equivalent flyback topology and 100kHz operation with higher voltage breakdown (700V) and extended operating temperature range (-40°C ~ 125°C). These parts operate within a different supply voltage range (6.5V ~ 20V) and lower duty cycle (68%), with 14W power rating.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (FPS™ Series): FSL116HR and FSL136HR are active products with identical electrical characteristics to FSL106HR, including matching supply voltage range (8V ~ 26V), breakdown voltage (650V), and duty cycle (77%). Both maintain through-hole 8-DIP package compatibility and ROHS3 compliance. FSL116HR provides 16W output (3W increase) while FSL136HR provides 26W output (13W increase), accommodating higher power applications within the same form factor.

For Functional Substitution (NCP1075 Series): NCP1075AAP100G, NCP1075ABP100G, NCP1075BAP100G, and NCP1075BBP100G are active products offering higher voltage breakdown (700V) and extended operating temperature range (-40°C ~ 125°C junction temperature versus -40°C ~ 105°C ambient for FSL106HR). These parts operate within a narrower supply voltage range (6.5V ~ 20V) and lower duty cycle (68%), with 14W power output. Circuit design modifications may be required to accommodate the different supply voltage specifications and duty cycle characteristics.

All substitute options maintain ROHS3 compliance and EAR99 export classification consistent with the original FSL106HR.

Frequently Asked Questions (FAQ)

Q: Can FSL116HR or FSL136HR directly replace FSL106HR without circuit modifications?

A: FSL116HR and FSL136HR are parametric equivalents with identical supply voltage range (8V ~ 26V), breakdown voltage (650V), switching frequency (100kHz), and duty cycle (77%). Direct PCB replacement is supported for through-hole 8-DIP package designs. Higher power ratings (16W and 26W) do not prevent substitution in applications requiring 13W or less.

Q: What are the key differences between FPS™ series (FSL106HR, FSL116HR, FSL136HR) and NCP1075 series substitutes?

A: FPS™ series parts operate with 8V ~ 26V supply voltage and 77% duty cycle, while NCP1075 series operates with 6.5V ~ 20V supply voltage and 68% duty cycle. NCP1075 series provides higher voltage breakdown (700V versus 650V) and extended operating temperature range to 125°C junction temperature. Circuit design changes are required when switching between these series due to different supply voltage specifications.

Q: Are NCP1075 series parts compatible with existing FSL106HR PCB layouts?

A: NCP1075AAP100G and NCP1075ABP100G use 7-PDIP package configuration (7 leads), while NCP1075BAP100G and NCP1075BBP100G use 8-PDIP package configuration. FSL106HR uses 8-DIP package. Physical package compatibility must be verified for PCB footprint alignment. Additionally, the different supply voltage range (6.5V ~ 20V) requires circuit design evaluation.

Q: What fault protection features are common across all substitute options?

A: FSL106HR, FSL116HR, and FSL136HR provide current limiting, overload, overtemperature, overvoltage, and short circuit protection. NCP1075 series provides current limiting, overpower, overtemperature, overvoltage, and short circuit protection. All parts include comprehensive fault protection suitable for offline flyback converter applications.

Q: Is inventory availability a consideration for part selection?

A: FSL116HR has the highest inventory (36,404 pcs), followed by FSL106HR (35,200 pcs), NCP1075ABP100G (960 pcs), NCP1075BAP100G (1,310 pcs), NCP1075BBP100G (1,000 pcs), and NCP1075AAP100G (824 pcs). FSL136HR has limited inventory (2,000 pcs). Inventory levels should be evaluated against production volume requirements.