FSL336LRN Equivalent & Substitute Parts

Part Overview

The FSL336LRN is an offline switch IC manufactured by onsemi, designed for power management applications in buck and flyback converter topologies. This device operates at 50kHz switching frequency with integrated fault protection including current limiting, overload, over-temperature, and over-voltage protection. The component is actively produced and RoHS3 compliant, making it suitable for modern industrial and consumer power supply designs. Identifying equivalent substitute parts is necessary when addressing supply chain constraints, inventory optimization, or application-specific power rating requirements while maintaining circuit topology and electrical performance.

Substiute Parts

FSL336LRN

onsemiIn Stock: 5141FSL336LRN Datasheet

Current PartRFQ

FSL306LRN

onsemiIn Stock: 3876FSL306LRN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The FSL336LRN has one parametric equivalent substitute: FSL306LRN. Substitution eligibility is determined by the following critical parameters that must remain constant across both devices:

• Voltage breakdown rating (650V)
• Supply voltage range (7V ~ 26V)
• Start-up voltage threshold (8V)
• Switching frequency (50kHz)
• Topology support (Buck, Flyback)
• Output isolation characteristic (Non-Isolated)
• Internal switch presence (Yes)
• Fault protection features (Current Limiting, Open Loop, Over Load, Over Temperature, Over Voltage)
• Operating temperature range (-40°C ~ 125°C)
• Package type (8-DIP, 7 Leads)
• Mounting type (Through Hole)

The FSL306LRN meets all these criteria. The primary difference is the power rating: FSL336LRN is rated for 20W while FSL306LRN is rated for 7W. This distinction determines application suitability based on power delivery requirements.

Parameter Comparison

Engineering Selection Recommendations

Both FSL336LRN and FSL306LRN are active products with ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current manufacturing standards. Selection between these devices depends on application power requirements. The FSL336LRN supports 20W power delivery and is the primary choice for higher-power buck and flyback converter applications. The FSL306LRN, rated for 7W, is suitable for lower-power applications within the same topology and electrical parameter set. Both devices share identical electrical characteristics, fault protection mechanisms, and thermal operating ranges, ensuring functional compatibility within their respective power envelopes. Through-hole mounting and identical DIP packaging enable direct PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can FSL306LRN replace FSL336LRN in any application?

A: FSL306LRN can replace FSL336LRN only in applications where the power requirement does not exceed 7W. Both devices share identical electrical parameters, topology support, and protection features. Applications requiring power delivery above 7W must use FSL336LRN.

Q: Are the packages physically identical?

A: Yes. Both FSL336LRN and FSL306LRN use 8-DIP (0.300", 7.62mm) packaging with 7 leads and through-hole mounting. PCB footprints are identical, allowing direct component substitution from a mechanical standpoint.

Q: Do these devices support the same converter topologies?

A: Yes. Both FSL336LRN and FSL306LRN support buck and flyback topologies with identical 50kHz switching frequency, 650V breakdown voltage, and 7V to 26V supply voltage range.

Q: What is the significance of the power rating difference?

A: The power rating indicates the maximum continuous power the device can deliver. FSL336LRN is rated for 20W while FSL306LRN is rated for 7W. This difference reflects thermal and current handling capabilities. Selection must align with circuit power requirements.

Q: Are both devices RoHS compliant?

A: Yes. Both FSL336LRN and FSL306LRN are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing.

Q: What fault protection features are included?

A: Both devices include current limiting, open loop, overload, over-temperature, and over-voltage protection. These features are identical across FSL336LRN and FSL306LRN.