FCMT299N60 Equivalent & Substitute Parts

Part Overview

The FCMT299N60 is an N-Channel 600V 12A Surface Mount Power MOSFET manufactured by onsemi in the SuperFET® II series. This device is rated for 125W continuous power dissipation and operates across a temperature range of -55°C to 150°C. The part is designated as "Not For New Designs," indicating it has reached end-of-life status. For applications requiring continued component availability or performance optimization, equivalent substitute parts with matching or superior electrical characteristics are necessary.

Substiute Parts

FCMT299N60

onsemiIn Stock: 9286FCMT299N60 Datasheet

Current PartRFQ

FCMT299N60

onsemiIn Stock: 9286FCMT299N60 Datasheet

Parametric EquivalentRFQ

IPL60R299CPAUMA1

Infineon TechnologiesIn Stock: 849IPL60R299CPAUMA1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FCMT299N60 is determined by strict equivalence across the following critical electrical and mechanical parameters:

Mandatory Matching Parameters:

• Drain to Source Voltage (Vdss): 600V minimum
• On-State Resistance (Rds On): 299 mOhm specification
• Gate Threshold Voltage (Vgs(th)): 3.5V maximum
• Mounting Type: Surface Mount
• Package Type: 4-PowerTSFN compatible footprint
• FET Technology: N-Channel MOSFET (Metal Oxide)

Allowable Variation Parameters:

• Continuous Drain Current (Id): Equal to or greater than 12A
• Gate Charge (Qg): Equal to or less than 51 nC
• Power Dissipation: Equal to or greater than 125W
• Operating Temperature Range: Equal to or exceeding -55°C to 150°C
• Input Capacitance (Ciss): Equal to or less than 1948 pF

Substitute parts must maintain compliance with ROHS3 and REACH requirements. Parts listed as "Not For New Designs" are acceptable substitutes for legacy system maintenance and repair applications.

Parameter Comparison

Engineering Selection Recommendations

FCMT299N60 (onsemi SuperFET® II)

This part maintains full electrical and thermal equivalence with itself. It is ROHS3 compliant and REACH unaffected. Current inventory of 9268 units is available. The part is designated "Not For New Designs," restricting its use to legacy system support, repair, and maintenance applications only.

IPL60R299CPAUMA1 (Infineon CoolMOS™ CP)

This part provides functional equivalence for the FCMT299N60 across all critical electrical parameters. The 600V Vdss, 299 mOhm Rds On, and 3.5V Vgs(th) specifications are identical. The continuous drain current of 11.1A (Tc) is marginally lower than the FCMT299N60 specification of 12A (Ta), but remains within acceptable operating margins for most applications. The gate charge of 22 nC is significantly lower, providing improved switching efficiency. Power dissipation is rated at 96W (Tc) compared to 125W (Tc), requiring thermal design verification for high-power applications. The operating temperature minimum of -40°C is higher than the FCMT299N60 specification of -55°C, restricting use in extreme cold environments. Both parts are ROHS3 compliant and REACH unaffected. Current inventory of 746 units is available. This part is also designated "Not For New Designs."

Frequently Asked Questions (FAQ)

Q: Can the IPL60R299CPAUMA1 directly replace the FCMT299N60 in all applications?

A: The IPL60R299CPAUMA1 is electrically equivalent for the majority of applications. However, three design considerations apply: (1) The continuous drain current specification is 11.1A versus 12A, requiring verification that circuit current demands do not exceed 11.1A continuous operation; (2) The maximum power dissipation is 96W versus 125W, requiring thermal analysis to confirm adequate heat dissipation in the target application; (3) The minimum operating temperature is -40°C versus -55°C, restricting use in applications requiring operation below -40°C.

Q: What is the significance of the different current measurement conditions (Ta vs. Tc)?

A: Ta indicates ambient temperature measurement, while Tc indicates case temperature measurement. The FCMT299N60 specifies 12A at Ta (ambient), while the IPL60R299CPAUMA1 specifies 11.1A at Tc (case). These different measurement conditions reflect different thermal modeling approaches between manufacturers. For practical circuit design, the lower specification (11.1A) should be used as the conservative design limit.

Q: Are both parts suitable for new product designs?

A: No. Both the FCMT299N60 and IPL60R299CPAUMA1 are designated "Not For New Designs." These parts are appropriate only for legacy system maintenance, repair, and field replacement applications. New product designs require selection of active production parts with current manufacturer support.

Q: What are the package compatibility requirements?

A: Both parts use the 4-PowerTSFN package type, which provides identical PCB footprint compatibility. Surface mount assembly equipment and reflow profiles are interchangeable between these parts.

Q: How do the gate charge specifications affect circuit performance?

A: The IPL60R299CPAUMA1 gate charge of 22 nC is significantly lower than the FCMT299N60 specification of 51 nC. Lower gate charge reduces driver circuit power consumption and enables faster switching transitions. This difference is beneficial for high-frequency switching applications and reduces thermal stress on gate driver circuits.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 compliant and REACH unaffected. Both carry EAR99 export classification and HTSUS code 8541.29.0095. Moisture sensitivity levels differ: FCMT299N60 is MSL 1 (Unlimited), while IPL60R299CPAUMA1 is MSL 2A (4 Weeks), requiring controlled storage and handling procedures for the Infineon part.