KA5M0165RN Equivalent & Substitute Parts

Part Overview

The KA5M0165RN is an offline switch flyback converter IC manufactured by onsemi, designed for isolated power supply applications using flyback topology. This component operates at 67kHz switching frequency with integrated current limiting, overload, over-temperature, and over-voltage protection. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

KA5M0165RN

onsemiIn Stock: 10223KA5M0165RN Datasheet

Current PartRFQ

FSGM300N

onsemiIn Stock: 17577FSGM300N Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The FSGM300N qualifies as a direct substitute for the KA5M0165RN based on the following critical parameters:

• Identical package format: 8-DIP (0.300", 7.62mm) with through-hole mounting
• Matching topology: Flyback converter architecture
• Equivalent breakdown voltage: 650V
• Identical switching frequency: 67kHz
• Matching duty cycle: 77%
• Same series designation: FPS™
• Identical fault protection feature set: Current Limiting, Over Load, Over Temperature, Over Voltage

The FSGM300N is an active product with enhanced specifications including isolated output, extended operating temperature range, and additional short-circuit protection, making it suitable for direct replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

The FSGM300N is the appropriate substitute for the obsolete KA5M0165RN. Both components share identical electrical and mechanical specifications across all critical parameters: package format, topology, breakdown voltage, switching frequency, and duty cycle. The FSGM300N maintains active product status with ROHS3 compliance certification, ensuring long-term availability and regulatory alignment. The extended operating temperature range (-40°C to 125°C) and additional short-circuit protection in the FSGM300N provide enhanced reliability margins compared to the original part. Pin-to-pin compatibility and identical package dimensions enable direct PCB-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the FSGM300N be used as a direct replacement for KA5M0165RN on existing PCBs?

A: Yes. Both components use identical 8-DIP package format with matching pin assignments and through-hole mounting. No PCB modifications are required.

Q: What are the key differences between these parts?

A: The FSGM300N offers extended operating temperature range (-40°C to 125°C versus -25°C to 85°C), additional short-circuit protection, isolated output capability, and ROHS3 compliance. Supply voltage range differs slightly (7.7V ~ 26V versus 8.8V ~ 30V).

Q: Why is the KA5M0165RN obsolete?

A: The KA5M0165RN has been discontinued by onsemi. The FSGM300N represents the active product line continuation within the FPS™ series.

Q: Are there any thermal considerations when substituting?

A: The FSGM300N supports higher junction temperatures (125°C maximum) compared to the KA5M0165RN (85°C maximum ambient). This provides additional thermal margin in applications with elevated operating conditions.

Q: Is the FSGM300N available in the same packaging options?

A: The FSGM300N is supplied in tube packaging. Verify packaging requirements for your procurement and assembly processes.

Q: What compliance certifications apply to the FSGM300N?

A: The FSGM300N is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.