STW45N60DM6 Equivalent & Substitute Parts

Part Overview

The STW45N60DM6 is an N-Channel MOSFET manufactured by STMicroelectronics, rated for 600V drain-to-source voltage with 30A continuous drain current at 25°C. This device is housed in a TO-247-3 through-hole package and is part of the MDmesh™ DM6 series. The part is currently in active production status with 2182 units in stock.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across critical parameters including voltage rating, current capacity, package type, and thermal characteristics. Alternative devices may be required due to supply chain considerations, design optimization, or application-specific performance requirements.

Substiute Parts

STW45N60DM6

STMicroelectronicsIn Stock: 2288STW45N60DM6 Datasheet

Current PartRFQ

FCH104N60F

onsemiIn Stock: 18638FCH104N60F Datasheet

SimilarRFQ

FCH110N65F-F155

Fairchild SemiconductorIn Stock: 1332FCH110N65F-F155 Datasheet

SimilarRFQ

SCT3080ALGC11

Rohm SemiconductorIn Stock: 2219SCT3080ALGC11 Datasheet

SimilarRFQ

SPW32N50C3FKSA1

Infineon TechnologiesIn Stock: 91316SPW32N50C3FKSA1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the STW45N60DM6 is determined by the following critical parameters:

Voltage Rating Compatibility: Substitute parts must maintain a minimum Vdss rating of 600V. Parts with higher voltage ratings (650V) are acceptable as they provide equivalent or superior voltage withstand capability.

Current Capacity: Substitute parts must support a minimum continuous drain current of 30A at 25°C. Parts rated for higher current capacity (35A, 37A) are acceptable as they provide equivalent or superior current handling.

Package and Mounting: All substitute parts must use TO-247-3 through-hole packaging to ensure mechanical and thermal compatibility with existing PCB layouts and thermal management solutions.

Operating Temperature Range: Substitute parts must support the full operating temperature range of -55°C to 150°C (TJ) to maintain functional equivalence across all application conditions.

Technology Type: Substitute parts may include either conventional MOSFET (Metal Oxide) or SiCFET (Silicon Carbide) technology, provided all electrical parameters remain within acceptable ranges for the application.

Compliance and Status: All substitute parts must maintain RoHS3 compliance and REACH unaffected status to satisfy regulatory requirements equivalent to the main part.

Parameter Comparison

Engineering Selection Recommendations

SPW32N50C3FKSA1 (Infineon Technologies): This part is rated for 560V, which is 40V below the main part's 600V rating. While it provides higher current capacity (32A) and superior power dissipation (284W), the reduced voltage margin may not be suitable for applications requiring the full 600V rating. This part maintains active product status and full RoHS3 compliance. Use only in applications where the maximum operating voltage does not exceed 560V.

FCH104N60F (onsemi): This part matches the 600V voltage rating and exceeds current capacity at 37A. However, it carries a "Not For New Designs" product status, indicating it is in end-of-life phase. While electrically compatible, this part should not be selected for new designs due to long-term availability concerns. Existing designs may continue to use this part for maintenance and replacement purposes.

FCH110N65F-F155 (Fairchild Semiconductor): This part exceeds the main part's specifications with 650V rating and 35A current capacity. It maintains active product status and is suitable for new designs. The higher voltage rating provides additional design margin. This part is recommended for applications requiring enhanced voltage headroom or where higher current capacity is beneficial.

SCT3080ALGC11 (Rohm Semiconductor): This SiCFET device matches the 600V voltage rating and 30A current capacity of the main part. It offers superior operating temperature capability (up to 175°C) and lower gate charge (48 nC), which may reduce switching losses in high-frequency applications. However, the reduced power dissipation rating (134W) and different gate drive voltage requirement (18V) require careful thermal and driver circuit evaluation. This part is recommended for applications where higher temperature operation or reduced switching losses provide system-level benefits.

Frequently Asked Questions (FAQ)

Q: Can the SPW32N50C3FKSA1 be used as a direct replacement for the STW45N60DM6?

A: The SPW32N50C3FKSA1 is not a direct replacement due to its 560V voltage rating, which is 40V lower than the main part's 600V rating. It may be used only in applications where the maximum operating voltage does not exceed 560V. All other electrical parameters are compatible.

Q: Why is the FCH104N60F marked as "Not For New Designs"?

A: The "Not For New Designs" status indicates that onsemi has discontinued active development and marketing of this part. While it remains electrically compatible and available in inventory, it is intended only for maintenance of existing designs. New designs should select from parts with active product status.

Q: What is the primary advantage of the SCT3080ALGC11 SiCFET over the main MOSFET part?

A: The SCT3080ALGC11 offers lower gate charge (48 nC versus 44 nC) and extended operating temperature capability (up to 175°C). These characteristics reduce switching losses and enable operation in higher-temperature environments. However, the reduced power dissipation rating (134W) and different gate drive voltage (18V) must be evaluated for specific applications.

Q: Are all substitute parts available in the same packaging as the main part?

A: Yes, all substitute parts use TO-247-3 through-hole packaging, ensuring mechanical and thermal compatibility with existing PCB layouts. The SCT3080ALGC11 uses a TO-247N variant, which is mechanically equivalent to TO-247-3 for mounting purposes.

Q: Which substitute part is recommended for new designs?

A: The FCH110N65F-F155 and SPW32N50C3FKSA1 both maintain active product status suitable for new designs. The FCH110N65F-F155 is recommended when the full 600V voltage rating or higher current capacity (35A) is required. The SPW32N50C3FKSA1 is suitable only for applications where 560V operation is acceptable.

Q: Do all substitute parts meet the same compliance requirements as the main part?

A: All substitute parts maintain RoHS3 compliance and REACH unaffected status equivalent to the main part. The FCH110N65F-F155 compliance status was not specified in available documentation and should be verified with the manufacturer before use in regulated applications.

Q: What is the impact of different gate charge values on circuit design?

A: Gate charge (Qg) affects the energy required to switch the FET and influences driver circuit design. The main part requires 44 nC at 10V, while substitutes range from 44 nC to 170 nC. Higher gate charge values require more driver current or longer switching times, potentially affecting circuit efficiency and switching frequency capability.

Q: Can the SCT3080ALGC11 be used with the same gate driver circuit as the main part?

A: The SCT3080ALGC11 requires 18V gate drive voltage compared to the main part's 10V specification. This difference necessitates a different gate driver circuit or a driver capable of adjustable output voltage. Direct substitution without driver circuit modification is not possible.