IRFU020 N-Channel MOSFET 60V 14A TO-251AA Equivalent & Substitute Parts

Part Overview

The IRFU020 is an N-Channel MOSFET manufactured by Vishay Siliconix, rated for 60V drain-to-source voltage and 14A continuous drain current in a Through Hole TO-251AA package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The IRFU020 serves in switching applications requiring moderate voltage and current ratings with thermal management through the TO-251AA form factor.

Substiute Parts

IRFU020

Vishay SiliconixIn Stock: 2357IRFU020 Datasheet

Current PartRFQ

IRFU024PBF

Vishay SiliconixIn Stock: 17523IRFU024PBF Datasheet

Parametric EquivalentRFQ

FQU13N06LTU

onsemiIn Stock: 19901FQU13N06LTU Datasheet

MFR RecommendedRFQ

FQU13N06LTU-WS

onsemiIn Stock: 35338FQU13N06LTU-WS Datasheet

MFR RecommendedRFQ

RFD3055LE

onsemiIn Stock: 15509RFD3055LE Datasheet

MFR RecommendedRFQ

STD12NF06L-1

STMicroelectronicsIn Stock: 17247STD12NF06L-1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRFU020 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Drain to Source Voltage (Vdss): Must equal or exceed 60V
• Continuous Drain Current (Id): Must equal or exceed 14A at 25°C
• Rds On (Max): Must not exceed 100 mOhm at specified gate voltage
• Gate Threshold Voltage: Must be compatible with 4V maximum specification
• Gate Charge: Lower values indicate faster switching characteristics
• Input Capacitance: Affects gate drive requirements
• Operating Temperature Range: Must support -55°C to 150°C minimum
• Vgs (Max): Must support ±20V gate voltage specification

Mechanical Compatibility Criteria:

• Package Type: TO-251-3 Short Leads, IPak, TO-251AA form factor
• Mounting Type: Through Hole

Substitute parts are grouped into two categories: Parametric Equivalents (matching all key electrical specifications) and Functional Alternatives (meeting minimum electrical requirements with acceptable trade-offs in secondary parameters such as gate charge or input capacitance).

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: IRFU024PBF

The IRFU024PBF is a parametric equivalent to the IRFU020, manufactured by Vishay Siliconix. It matches all critical electrical specifications including 60V Vdss, 14A continuous drain current, 100 mOhm Rds On at 10V, and identical gate threshold voltage of 4V. The IRFU024PBF is classified as Active product status, ensuring long-term availability and supply chain continuity. It carries ROHS3 compliance, addressing regulatory requirements for new designs. The identical TO-251AA package and thermal characteristics (42W Tc) provide direct mechanical and thermal compatibility. This part is the preferred choice for direct replacement in existing designs.

Secondary Recommendation: STD12NF06L-1

The STD12NF06L-1 from STMicroelectronics is an Active product offering 60V Vdss and 12A continuous drain current, meeting the minimum electrical requirements. It provides 100 mOhm Rds On at 10V, matching the IRFU020 specification. The STD12NF06L-1 features an extended operating temperature range (-55°C to 175°C) and ROHS3 compliance. The I-PAK package is mechanically compatible with TO-251AA form factor. Power dissipation of 42.8W (Tc) is equivalent to the IRFU020. This part is suitable for applications where the 12A current rating is sufficient and long-term availability is prioritized.

Tertiary Recommendation: RFD3055LE

The RFD3055LE from onsemi provides 60V Vdss and 11A continuous drain current. It delivers 107 mOhm Rds On at 5V and supports an extended operating temperature range to 175°C. Power dissipation of 38W (Tc) is slightly lower than the IRFU020. The I-PAK package is mechanically compatible. This part is suitable for applications where the 11A current rating is acceptable and thermal performance is adequate. Product status is Obsolete.

Not Recommended: FQU13N06LTU and FQU13N06LTU-WS

Both onsemi parts (FQU13N06LTU and FQU13N06LTU-WS) are classified as Obsolete and provide only 11A continuous drain current, below the IRFU020 specification of 14A. Gate charge of 6.4 nC at 5V is significantly lower than the IRFU020 (25 nC at 10V), indicating different switching characteristics. Input capacitance of 350 pF is substantially lower than the IRFU020 (640 pF), affecting gate drive circuit design. These parts are not suitable for direct replacement in current-critical applications.

Frequently Asked Questions (FAQ)

Q: Can the IRFU024PBF directly replace the IRFU020 without circuit modifications?

A: Yes. The IRFU024PBF is a parametric equivalent with identical electrical specifications (60V Vdss, 14A Id, 100 mOhm Rds On, 4V Vgs(th)) and package type (TO-251AA). No circuit modifications are required. The primary difference is product status: IRFU024PBF is Active while IRFU020 is Obsolete.

Q: What is the difference between TO-251AA and I-PAK packages?

A: Both are Through Hole packages with the same physical form factor (TO-251-3 Short Leads, IPak, TO-251AA). They are mechanically and electrically interchangeable for PCB mounting and thermal management purposes.

Q: Why do some substitute parts have lower continuous drain current ratings?

A: Parts such as FQU13N06LTU (11A) and RFD3055LE (11A) have lower current ratings than the IRFU020 (14A). These parts are functional alternatives suitable only for applications where the lower current rating is acceptable. For designs requiring the full 14A specification, IRFU024PBF or STD12NF06L-1 are required.

Q: What does RoHS compliance mean for component selection?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations, eliminating lead and other restricted materials. The IRFU020 is RoHS non-compliant. All recommended substitutes (IRFU024PBF, STD12NF06L-1, RFD3055LE, FQU13N06LTU, FQU13N06LTU-WS) are ROHS3 compliant, supporting regulatory requirements for new designs and manufacturing.

Q: How does gate charge affect circuit design?

A: Gate charge (Qg) determines the energy required to switch the MOSFET on and off. The IRFU020 has 25 nC at 10V, while onsemi parts have 6.4 nC at 5V. Lower gate charge reduces gate drive circuit power consumption and enables faster switching. Designs using lower gate charge parts may require gate drive circuit optimization.

Q: Is the STD12NF06L-1 suitable for applications requiring 14A continuous current?

A: No. The STD12NF06L-1 is rated for 12A continuous drain current, which is below the IRFU020 specification of 14A. It is suitable only for applications where 12A is sufficient. For full 14A capability, use IRFU024PBF.

Q: What is the significance of operating temperature range differences?

A: The IRFU020 operates from -55°C to 150°C (TJ). STD12NF06L-1 and RFD3055LE extend to 175°C. Extended temperature range provides design margin for high-temperature environments but does not affect compatibility in standard temperature applications. The IRFU020 minimum range (-55°C to 150°C) is met by all recommended substitutes.

Q: Can I use multiple lower-current parts in parallel to achieve 14A?

A: Parallel operation of MOSFETs requires careful circuit design including matched gate drive, current balancing, and thermal management. This is outside the scope of direct substitution. For applications requiring 14A, use IRFU024PBF or STD12NF06L-1 as single devices.

Q: Why is IRFU024PBF the primary recommendation despite both being Vishay products?

A: IRFU024PBF is Active product status, ensuring long-term availability and supply chain support. The IRFU020 is Obsolete, making IRFU024PBF the strategic choice for new designs and ongoing production. Both are parametric equivalents, but IRFU024PBF provides procurement continuity.