IRF740STRRPBF Equivalent & Substitute Parts

Part Overview

The IRF740STRRPBF is an N-Channel MOSFET manufactured by Vishay Siliconix, rated for 400V drain-to-source voltage with 10A continuous drain current. This device is housed in a Surface Mount TO-263 (D2PAK) package and is designed for high-voltage switching applications. The part is Active in product status and ROHS3 compliant, with unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or application-specific performance enhancements while maintaining the same functional role in circuit design.

Substiute Parts

IRF740STRRPBF

Vishay SiliconixIn Stock: 3223IRF740STRRPBF Datasheet

Current PartRFQ

IRF740STRLPBF

Vishay SiliconixIn Stock: 19984IRF740STRLPBF Datasheet

Parametric EquivalentRFQ

IXFA12N50P

IXYSIn Stock: 1158IXFA12N50P Datasheet

MFR RecommendedRFQ

STB11NK40ZT4

STMicroelectronicsIn Stock: 2395STB11NK40ZT4 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IRF740STRRPBF are classified based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

• Drain to Source Voltage (Vdss): 400V minimum
• Continuous Drain Current (Id): 10A minimum
• On-State Resistance (Rds On): 550mOhm maximum at specified gate voltage
• Gate Charge (Qg): Comparable switching characteristics
• Package Type: Surface Mount TO-263 (D2PAK) compatible
• Operating Temperature: -55°C to 150°C minimum range
• RoHS Compliance: ROHS3 Compliant

Parametric Equivalent Classification: Parts meeting all primary criteria with identical or superior electrical performance and identical package specifications are classified as parametric equivalents.

Manufacturer Recommended Classification: Parts exceeding primary criteria in one or more electrical parameters (higher voltage rating, higher current rating, or lower on-state resistance) while maintaining package compatibility are classified as manufacturer recommended substitutes.

Parameter Comparison

Engineering Selection Recommendations

IRF740STRLPBF (Parametric Equivalent)

The IRF740STRLPBF is a parametric equivalent to the IRF740STRRPBF. Both parts are manufactured by Vishay Siliconix and share identical electrical specifications across all measured parameters. The IRF740STRLPBF differs only in packaging format (Tape & Reel versus alternative reel configuration). Both parts maintain Active product status, ROHS3 compliance, and MSL 1 rating. This substitute is suitable for direct replacement in applications where the IRF740STRRPBF is specified, with no electrical or thermal performance variation.

IXFA12N50P (Manufacturer Recommended)

The IXFA12N50P is manufactured by IXYS and provides enhanced electrical performance relative to the IRF740STRRPBF. This device features a higher drain-to-source voltage rating (500V versus 400V), increased continuous drain current (12A versus 10A), and significantly lower gate charge (29nC versus 63nC). The on-state resistance is improved (500mOhm versus 550mOhm at comparable conditions), and power dissipation capability is substantially higher (200W Tc versus 125W Tc). The IXFA12N50P maintains identical package compatibility (TO-263-3, D2PAK), operating temperature range, and compliance certifications. This substitute is applicable in applications requiring higher voltage headroom, faster switching characteristics, or enhanced thermal performance.

STB11NK40ZT4 (Manufacturer Recommended)

The STB11NK40ZT4 is manufactured by STMicroelectronics and operates within the same voltage class (400V) as the IRF740STRRPBF. This device features a continuous drain current rating of 9A (slightly below the 10A specification) and maintains equivalent on-state resistance (550mOhm). The STB11NK40ZT4 offers reduced gate charge (32nC versus 63nC) and lower input capacitance (930pF versus 1400pF), resulting in faster switching performance. Power dissipation capability is 110W Tc. The device maintains identical package compatibility, operating temperature range, and compliance certifications. This substitute is applicable in applications where reduced switching losses and improved switching speed are beneficial, with the understanding that continuous current rating is marginally lower.

Frequently Asked Questions (FAQ)

Q: Can the IRF740STRLPBF be used as a direct replacement for the IRF740STRRPBF?

A: Yes. The IRF740STRLPBF is a parametric equivalent with identical electrical specifications. The only difference is packaging format. Both parts are manufactured by Vishay Siliconix and share all critical electrical parameters including Vdss, Id, Rds On, gate charge, and thermal characteristics.

Q: What are the key differences between the IXFA12N50P and the IRF740STRRPBF?

A: The IXFA12N50P provides enhanced performance in three areas: higher voltage rating (500V versus 400V), higher current rating (12A versus 10A), and significantly lower gate charge (29nC versus 63nC). These improvements result in faster switching and higher thermal capacity. The on-state resistance is also lower (500mOhm versus 550mOhm). Package compatibility and operating temperature range remain identical.

Q: Is the STB11NK40ZT4 suitable for applications requiring 10A continuous current?

A: The STB11NK40ZT4 is rated for 9A continuous drain current, which is below the 10A specification of the IRF740STRRPBF. This device is suitable for applications where the actual operating current does not exceed 9A. For applications requiring the full 10A rating, the IRF740STRRPBF or IXFA12N50P are appropriate selections.

Q: Are all substitute parts compatible with the same PCB layout and footprint?

A: Yes. All substitute parts listed use the TO-263-3 (D2PAK) package with identical pin configuration and mechanical dimensions. PCB footprints and thermal pad layouts are compatible across all parts.

Q: What is the advantage of the STB11NK40ZT4 over the IRF740STRRPBF?

A: The STB11NK40ZT4 offers reduced gate charge (32nC versus 63nC) and lower input capacitance (930pF versus 1400pF), resulting in faster switching speed and reduced switching losses. This is beneficial in high-frequency switching applications. Power dissipation capability is 110W Tc, which is lower than the IRF740STRRPBF (125W Tc).

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the IRF740STRRPBF.

Q: Which substitute part offers the best thermal performance?

A: The IXFA12N50P offers the highest power dissipation capability at 200W Tc, compared to 125W Tc for the IRF740STRRPBF and 110W Tc for the STB11NK40ZT4. This makes the IXFA12N50P suitable for applications with higher thermal demands.

Q: Can the IXFA12N50P be used in circuits designed for 400V operation?

A: Yes. The IXFA12N50P is rated for 500V drain-to-source voltage, which exceeds the 400V requirement. This provides additional voltage margin and is suitable for 400V circuit designs. The higher voltage rating does not create compatibility issues.