FSL137MRIN Equivalent & Substitute Parts

Part Overview

The FSL137MRIN is an offline switch flyback converter IC manufactured by onsemi, designed for isolated power management applications. This device operates at 67kHz switching frequency with a 30W power rating and integrates internal switching functionality with comprehensive fault protection. The FSL137MRIN is currently in active product status with 44,640 units available in inventory.

The FSL117MRIN represents a parametric equivalent from the same FPS™ series. However, the FSL117MRIN is classified as obsolete, making the FSL137MRIN the recommended active alternative for new designs and ongoing production requirements.

Substiute Parts

FSL137MRIN

onsemiIn Stock: 44689FSL137MRIN Datasheet

Current PartRFQ

FSL117MRIN

onsemiIn Stock: 20474FSL117MRIN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FSL137MRIN is determined by the following critical parameters:

• Topology: Flyback converter architecture
• Output Isolation: Isolated configuration
• Internal Switch(s): Integrated switching element
• Voltage - Breakdown: 700V rating
• Voltage - Supply (Vcc/Vdd): 7.5V ~ 26V input range
• Voltage - Start Up: 12V threshold
• Frequency - Switching: 67kHz operation
• Duty Cycle: 67% maximum
• Package / Case: 8-DIP (0.300", 7.62mm) form factor
• Mounting Type: Through Hole compatibility
• Fault Protection: Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit capabilities

The FSL117MRIN meets all these core substitution criteria. The primary distinction between these parts is the power rating: FSL137MRIN delivers 30W while FSL117MRIN is rated for 15W. This difference reflects the power handling capability but does not affect the fundamental electrical and mechanical compatibility for applications within the FSL117MRIN's power envelope.

Parameter Comparison

Engineering Selection Recommendations

For new designs and production applications, the FSL137MRIN is the appropriate selection. This device maintains active product status with confirmed inventory availability of 44,640 units, ensuring supply chain continuity and long-term support from onsemi.

The FSL117MRIN, while electrically and mechanically compatible within its 15W power specification, carries obsolete product status. Existing designs currently utilizing the FSL117MRIN may continue operation with this component from available inventory (20,400 units), but new implementations should transition to the FSL137MRIN to align with current product lifecycle management and ensure future availability.

Both devices maintain identical compliance certifications: ROHS3 Compliant and REACH Unaffected status. The selection between these parts should be driven by application power requirements and product lifecycle strategy rather than electrical or mechanical constraints.

Frequently Asked Questions (FAQ)

Q: Can FSL117MRIN be used as a direct replacement for FSL137MRIN in existing designs?

A: The FSL117MRIN is electrically and mechanically compatible with FSL137MRIN designs. However, the FSL117MRIN is rated for 15W maximum power output compared to FSL137MRIN's 30W rating. Substitution is valid only for applications requiring 15W or less. The FSL117MRIN's obsolete status makes it unsuitable for new production planning.

Q: What are the key compatibility factors between FSL137MRIN and FSL117MRIN?

A: Both devices share identical specifications across topology (Flyback), isolation (Isolated), voltage ratings (700V breakdown, 7.5V-26V supply, 12V startup), switching frequency (67kHz), duty cycle (67%), fault protection features, operating temperature range (-40°C to 125°C), and 8-DIP through-hole package. The sole functional difference is power rating: 30W versus 15W.

Q: Are there any compliance or certification differences between these parts?

A: No. Both FSL137MRIN and FSL117MRIN maintain identical compliance status: ROHS3 Compliant and REACH Unaffected. Regulatory and environmental requirements do not differentiate these devices.

Q: Why is FSL117MRIN listed as obsolete?

A: Product status reflects onsemi's lifecycle management. The FSL137MRIN supersedes the FSL117MRIN in the FPS™ series portfolio. Existing FSL117MRIN inventory remains available for legacy system support, but new designs should specify FSL137MRIN.

Q: Can FSL137MRIN replace FSL117MRIN in legacy systems?

A: Yes. The FSL137MRIN is a direct upgrade path for FSL117MRIN applications. The identical electrical and mechanical specifications ensure pin-for-pin compatibility, while the higher 30W power rating provides additional design margin. No circuit modifications are required.

Q: What is the package compatibility between these devices?

A: Both devices use identical 8-DIP (0.300", 7.62mm) through-hole packaging. PCB layouts and socket designs require no modification when transitioning between these parts.