MSC035SMA170B Equivalent & Substitute Parts

Part Overview

The MSC035SMA170B is an N-Channel Silicon Carbide MOSFET manufactured by Microchip Technology, rated for 1700 V drain-to-source voltage with 68 A continuous drain current and 370 W power dissipation. The device is housed in a TO-247-3 through-hole package and is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified to provide design flexibility when the primary part is unavailable or when alternative electrical characteristics better suit specific application requirements while maintaining compatibility within the same package and voltage class.

Substiute Parts

MSC035SMA170B

Microchip TechnologyIn Stock: 1172MSC035SMA170B Datasheet

Current PartRFQ

G3R45MT17D

GeneSiC SemiconductorIn Stock: 2226G3R45MT17D Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MSC035SMA170B is determined by the following critical parameters:

Mandatory Matching Criteria:

• Drain-to-Source Voltage (Vdss): 1700 V
• Package Type: TO-247-3 through-hole configuration
• FET Type: N-Channel
• Technology: SiCFET (Silicon Carbide)

Allowable Variation Parameters:

• Continuous Drain Current (Id): Substitute must meet or exceed application requirements
• On-State Resistance (Rds On): Lower values are acceptable; higher values require thermal analysis
• Power Dissipation: Higher ratings provide design margin
• Gate Charge (Qg): Variations affect switching speed and driver requirements
• Operating Temperature Range: Substitute range must encompass application operating window
• Compliance Status: ROHS3 and REACH compliance must be maintained

The identified substitute G3R45MT17D from GeneSiC Semiconductor meets all mandatory matching criteria and operates within the same voltage and package class, enabling direct functional substitution with documented electrical parameter differences.

Parameter Comparison

Engineering Selection Recommendations

MSC035SMA170B Selection Criteria:

• Primary choice when maximum continuous drain current of 68 A is required
• Lower on-state resistance (45 mOhm) reduces conduction losses in high-current applications
• Extended negative gate voltage rating (-10 V) provides enhanced noise immunity in switching circuits
• Lower input capacitance (3300 pF) reduces gate driver power requirements

G3R45MT17D Selection Criteria:

• Suitable when continuous drain current requirement is 61 A or lower
• Higher power dissipation rating (438 W) provides additional thermal margin
• Symmetric gate voltage rating (±15 V) simplifies driver circuit design
• Both devices maintain active production status and full compliance certifications

Substitution Feasibility: Both devices are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for equivalent component selection. The TO-247-3 package ensures mechanical and thermal interface compatibility. Selection between these parts depends on specific application current requirements and gate driver voltage capabilities rather than compliance or availability constraints.

Frequently Asked Questions (FAQ)

Q: Can G3R45MT17D directly replace MSC035SMA170B in existing designs?

A: Direct replacement is possible when the application continuous drain current requirement does not exceed 61 A. The TO-247-3 package provides identical mechanical fit and thermal interface. Gate driver circuits must accommodate the G3R45MT17D gate voltage rating of ±15 V, which differs from the MSC035SMA170B specification of +23 V, -10 V.

Q: What are the key electrical differences between these devices?

A: The MSC035SMA170B provides higher continuous drain current (68 A versus 61 A) and lower on-state resistance (45 mOhm versus 58 mOhm). The G3R45MT17D offers higher power dissipation capability (438 W versus 370 W) and higher input capacitance (4523 pF versus 3300 pF). Gate charge specifications are comparable (178 nC versus 182 nC).

Q: Are both devices suitable for the same voltage class applications?

A: Yes. Both devices are rated for 1700 V drain-to-source voltage and operate within the same voltage class. The operating temperature ranges overlap from -55°C to 175°C, with the MSC035SMA170B extending to -60°C minimum.

Q: What package considerations apply to these substitutes?

A: Both devices use TO-247-3 through-hole packaging, ensuring identical PCB footprint, lead spacing, and thermal interface characteristics. No package-related modifications are required for mechanical substitution.

Q: Do compliance certifications differ between these parts?

A: No. Both the MSC035SMA170B and G3R45MT17D carry ROHS3 compliance and REACH unaffected status. Moisture sensitivity level is identical at MSL 1 (unlimited). No compliance-related restrictions apply to substitution.

Q: How do gate charge specifications affect circuit design?

A: Gate charge values (178 nC and 182 nC respectively) are comparable and do not require gate driver redesign. The difference in gate voltage ratings (MSC035SMA170B: +23 V, -10 V; G3R45MT17D: ±15 V) may require driver circuit verification to ensure compatibility with existing gate voltage supplies.