STB45N65M5 Equivalent & Substitute Parts

Part Overview

The STB45N65M5 is an N-Channel MOSFET manufactured by STMicroelectronics, part of the MDmesh™ V series. This device operates at 650V drain-to-source voltage with a continuous drain current of 35A at 25°C and maximum power dissipation of 210W. The component is housed in a Surface Mount TO-263 (D2PAK) package and is classified as Active product status.

Substitute parts become necessary when the primary component experiences supply constraints, extended lead times, or when design requirements permit operation within the electrical and mechanical tolerances of alternative devices. The identification of equivalent components requires strict alignment of critical electrical parameters including voltage rating, current capacity, on-resistance characteristics, and package compatibility.

Substiute Parts

STB45N65M5

STMicroelectronicsIn Stock: 2621STB45N65M5 Datasheet

Current PartRFQ

IPB60R099CPATMA1

Infineon TechnologiesIn Stock: 1919IPB60R099CPATMA1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STB45N65M5 is determined by the following critical electrical and mechanical parameters:

Voltage Rating Compatibility: The substitute device must operate at or above the 650V drain-to-source voltage specification. Devices rated below this threshold cannot be used as direct substitutes.

Current Capacity: The continuous drain current must meet or exceed 35A at 25°C to maintain equivalent current-handling capability.

On-Resistance Characteristics: The Rds On (maximum) value determines power dissipation and thermal performance. Substitute devices with higher on-resistance values will generate increased heat and may require thermal management adjustments.

Package Compatibility: The device must be housed in a TO-263 (D2PAK) Surface Mount package to ensure mechanical and thermal interface compatibility with existing PCB designs.

Gate Charge and Threshold Voltage: These parameters affect switching speed and gate drive requirements. Significant deviations may necessitate modifications to gate drive circuitry.

Compliance and Status: Active product status ensures long-term availability and supply chain stability. Devices with "Not For New Designs" status indicate end-of-life trajectory and limited future availability.

The IPB60R099CPATMA1 (Infineon Technologies, CoolMOS™ CP series) is identified as a substitute part. However, this device operates at 600V drain-to-source voltage, which is below the 650V specification of the STB45N65M5. This voltage differential represents a critical limitation that restricts substitution to applications where the actual operating voltage does not approach the 650V rating of the primary device.

Parameter Comparison

Engineering Selection Recommendations

Primary Device (STB45N65M5): This component maintains Active product status, indicating ongoing manufacturer support and long-term availability. The device is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. Selection of the STB45N65M5 is appropriate for new designs and applications requiring sustained component supply.

Substitute Device (IPB60R099CPATMA1): This Infineon component carries "Not For New Designs" status, indicating the manufacturer has discontinued active development and is transitioning the product toward end-of-life. While the device is ROHS3 compliant and REACH unaffected, the reduced voltage rating (600V versus 650V) and lower continuous drain current (31A versus 35A) present functional limitations. The higher on-resistance value (99mOhm versus 78mOhm) results in increased power dissipation and thermal generation.

Substitution with the IPB60R099CPATMA1 is restricted to applications where:

• The actual operating voltage remains significantly below 600V
• The required continuous drain current does not exceed 31A
• Increased on-resistance and associated power dissipation are acceptable within thermal design constraints
• Extended product availability is not a design requirement

For new designs and applications requiring long-term component availability, the STB45N65M5 is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can the IPB60R099CPATMA1 directly replace the STB45N65M5 in all applications?

A: No. The IPB60R099CPATMA1 operates at 600V maximum drain-to-source voltage, compared to 650V for the STB45N65M5. Direct substitution is limited to applications where the actual operating voltage remains below 600V. Additionally, the reduced continuous drain current (31A versus 35A) and increased on-resistance (99mOhm versus 78mOhm) must be evaluated against specific circuit requirements.

Q: What is the significance of the "Not For New Designs" status on the IPB60R099CPATMA1?

A: This designation indicates that Infineon Technologies has discontinued active development of this component and is managing inventory toward end-of-life. While existing stock may be available, future availability cannot be guaranteed. New designs should utilize components with Active status to ensure long-term supply chain stability.

Q: Are the TO-263 (D2PAK) packages of both devices mechanically identical?

A: Both devices use the TO-263 (D2PAK) Surface Mount package with 2 leads plus tab configuration. The mechanical footprint and thermal interface characteristics are compatible, allowing PCB layout to remain unchanged during substitution. However, thermal performance differences resulting from on-resistance variations must be considered in thermal design calculations.

Q: How does the difference in on-resistance affect circuit performance?

A: The STB45N65M5 exhibits 78mOhm on-resistance compared to 99mOhm for the IPB60R099CPATMA1. At equivalent current levels, the higher on-resistance of the substitute device generates proportionally greater power dissipation and heat. For a 35A continuous current, this difference results in approximately 27% higher power dissipation in the substitute device, requiring verification that thermal management remains adequate.

Q: What gate drive voltage considerations apply to substitution?

A: The STB45N65M5 accepts maximum gate voltage of ±25V, while the IPB60R099CPATMA1 accepts ±20V. Existing gate drive circuits designed for the primary device must be verified to operate within the reduced voltage tolerance of the substitute. Additionally, the gate threshold voltage differs (5V versus 3.5V), which may affect switching characteristics and gate drive timing.

Q: Are compliance certifications equivalent between the two devices?

A: Both devices are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. Compliance certifications are equivalent and do not present barriers to substitution from a regulatory perspective.