STI40N65M2 Equivalent & Substitute Parts

Part Overview

The STI40N65M2 is an N-Channel MOSFET manufactured by STMicroelectronics, rated for 650V drain-to-source voltage with 32A continuous drain current at 25°C. This device is packaged in a Through Hole I2PAK (TO-262-3) configuration and is designed for high-voltage switching applications requiring 250W power dissipation capability. The STI40N65M2 is classified as obsolete, necessitating identification of equivalent substitute components that maintain functional compatibility with existing circuit designs while ensuring continued supply availability.

Substiute Parts

STI40N65M2

STMicroelectronicsIn Stock: 1598STI40N65M2 Datasheet

Current PartRFQ

IPI60R125CPXKSA1

Infineon TechnologiesIn Stock: 1329IPI60R125CPXKSA1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STI40N65M2 is determined by strict equivalence across the following critical parameters:

Voltage Rating: The substitute part must maintain a Drain to Source Voltage (Vdss) of 650V to ensure safe operation within the same voltage class.

Current Rating: The substitute part must support a continuous drain current (Id) at or above 32A at 25°C to handle the same load conditions.

On-State Resistance (Rds On): The substitute part must maintain Rds On specifications within acceptable limits to preserve circuit efficiency and thermal performance.

Power Dissipation: The substitute part must support power dissipation at or above 250W to ensure thermal stability in the application.

Packaging: The substitute part must use Through Hole mounting in TO-262-3 configuration to ensure mechanical and electrical compatibility with existing PCB layouts.

Gate Charge: The substitute part gate charge characteristics must be compatible with existing gate drive circuitry.

The IPI60R125CPXKSA1 from Infineon Technologies meets these substitution criteria within the defined parameter tolerances.

Parameter Comparison

Engineering Selection Recommendations

The IPI60R125CPXKSA1 serves as a functional substitute for the obsolete STI40N65M2 based on the following engineering criteria:

Voltage Class Equivalence: Both devices are rated for 650V Vdss, ensuring compatibility within the same voltage application domain.

Mechanical Compatibility: Both devices utilize Through Hole TO-262-3 packaging, enabling direct PCB layout compatibility without redesign.

Regulatory Compliance: Both devices maintain ROHS3 compliance, REACH Unaffected status, and MSL 1 rating, satisfying environmental and supply chain requirements.

Product Status: The IPI60R125CPXKSA1 is classified as Active, ensuring continued availability and supply chain stability compared to the obsolete STI40N65M2.

Current Rating Consideration: The IPI60R125CPXKSA1 is rated for 25A continuous drain current, which is lower than the STI40N65M2 at 32A. Circuit designs operating at or below 25A continuous current are fully compatible. Designs requiring the full 32A capability must be evaluated for thermal and current distribution characteristics.

On-State Resistance: The IPI60R125CPXKSA1 exhibits higher Rds On (125 mOhm vs. 99 mOhm), resulting in increased conduction losses. Thermal analysis of the application is required to confirm acceptable heat dissipation within the 208W power rating.

Frequently Asked Questions (FAQ)

Q: Can the IPI60R125CPXKSA1 directly replace the STI40N65M2 in all applications?

A: Direct replacement is possible for applications operating at continuous drain currents of 25A or below. Applications requiring the full 32A rating of the STI40N65M2 require circuit evaluation. The higher Rds On of the substitute part increases conduction losses and must be verified against thermal design margins.

Q: Are the packages physically identical?

A: Both devices use Through Hole TO-262-3 Long Leads packaging. Physical dimensions and pin configurations are compatible, allowing direct PCB mounting without layout modification.

Q: What is the impact of the higher gate charge in the IPI60R125CPXKSA1?

A: The IPI60R125CPXKSA1 has a gate charge of 70 nC compared to 56.5 nC in the STI40N65M2. This requires slightly higher gate drive energy and may increase switching losses. Gate drive circuitry must be verified to supply adequate current for the specified gate charge.

Q: Does the lower power dissipation rating of the IPI60R125CPXKSA1 affect compatibility?

A: The IPI60R125CPXKSA1 is rated for 208W maximum power dissipation versus 250W for the STI40N65M2. Applications must be evaluated to ensure actual power dissipation remains within the 208W limit under worst-case operating conditions.

Q: Are both devices RoHS and REACH compliant?

A: Yes. Both the STI40N65M2 and IPI60R125CPXKSA1 are ROHS3 compliant, REACH Unaffected, and carry MSL 1 moisture sensitivity rating, meeting current environmental and regulatory requirements.

Q: What is the significance of the STI40N65M2 being obsolete?

A: Obsolete status indicates the STI40N65M2 is no longer manufactured by STMicroelectronics and existing inventory is limited. The IPI60R125CPXKSA1, classified as Active, ensures long-term supply availability for new designs and production continuity.