IRF840PBF N-Channel MOSFET 500V 8A Equivalent & Substitute Parts

Part Overview

The IRF840PBF is an N-Channel MOSFET manufactured by Infineon Technologies, designed for high-voltage switching applications. This device features a 500V drain-to-source voltage rating with 8A continuous drain current capability and 125W power dissipation at the junction temperature. The IRF840PBF is classified as obsolete product status, making identification of active equivalent and substitute parts essential for ongoing design support and procurement continuity. Substitute parts must maintain identical electrical characteristics and mechanical compatibility to ensure direct replacement without circuit redesign.

Substiute Parts

IRF840PBF

Infineon TechnologiesIn Stock: 329795IRF840PBF Datasheet

Current PartRFQ

IRF840PBF

Vishay SiliconixIn Stock: 329788IRF840PBF Datasheet

Parametric EquivalentRFQ

IRF840PBF-BE3

Vishay SiliconixIn Stock: 4311IRF840PBF-BE3 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IRF840PBF are identified based on strict parametric equivalence across the following critical specifications:

Electrical Parameters (Must Match Exactly):

• Drain to Source Voltage (Vdss): 500V
• Continuous Drain Current (Id) @ 25°C: 8A (Tc)
• On-State Drain Resistance (Rds On): 850 mOhm @ 4.8A, 10V
• Gate Threshold Voltage (Vgs(th)): 4V @ 250µA
• Gate Charge (Qg): 63 nC @ 10V
• Maximum Gate Voltage (Vgs): ±20V
• Input Capacitance (Ciss): 1300 pF @ 25V
• Power Dissipation (Max): 125W (Tc)
• Operating Temperature Range: -55°C to 150°C (TJ)

Mechanical Parameters (Must Match Exactly):

• Package / Case: TO-220-3
• Mounting Type: Through Hole
• Supplier Device Package: TO-220AB

Technology & Compliance:

• Technology: MOSFET (Metal Oxide)
• RoHS Status: ROHS3 Compliant

All identified substitute parts maintain 100% parametric equivalence across these specifications, ensuring direct functional and mechanical interchangeability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: IRF840PBF (Vishay Siliconix)

The Vishay Siliconix IRF840PBF is the direct parametric equivalent to the obsolete Infineon IRF840PBF. This part maintains active product status, ensuring long-term availability and supply chain continuity. All electrical and mechanical specifications are identical. The device is ROHS3 compliant and carries REACH Affected status. This part is suitable for direct replacement in all applications previously designed with the Infineon IRF840PBF.

Secondary Substitute: IRF840PBF-BE3 (Vishay Siliconix)

The IRF840PBF-BE3 is an alternative variant from Vishay Siliconix with identical parametric specifications. This part maintains active product status and ROHS3 compliance. REACH status is listed as Vendor Undefined. Current inventory availability is lower (4,235 pcs) compared to the primary substitute. This part is suitable for direct replacement where the -BE3 variant designation is acceptable within design specifications.

Compliance Considerations:

All substitute parts are ROHS3 compliant and suitable for applications requiring environmental compliance. The Infineon IRF840PBF carries REACH Unaffected status, while Vishay Siliconix variants carry REACH Affected or Vendor Undefined status. Design teams must verify REACH compliance requirements for their specific application and geographic market.

Frequently Asked Questions (FAQ)

Q: Can the Vishay Siliconix IRF840PBF directly replace the obsolete Infineon IRF840PBF?

A: Yes. The Vishay Siliconix IRF840PBF is a parametric equivalent with identical electrical and mechanical specifications. All critical parameters including Vdss (500V), Id (8A), Rds On (850 mOhm), and package type (TO-220-3) are matched. Direct substitution is supported without circuit modification.

Q: What is the difference between IRF840PBF and IRF840PBF-BE3?

A: Both parts are manufactured by Vishay Siliconix and share identical electrical and mechanical specifications. The -BE3 designation indicates a specific variant or packaging configuration. Both are suitable for direct replacement of the Infineon IRF840PBF. Selection between these variants should be based on availability, lead time, and internal design documentation requirements.

Q: Are there any packaging differences between the substitute parts?

A: All substitute parts use the TO-220-3 package with through-hole mounting. The Vishay Siliconix IRF840PBF is supplied in Tube packaging, while the IRF840PBF-BE3 is also supplied in Tube packaging. No mechanical redesign is required for PCB layout or thermal management.

Q: What compliance certifications apply to these substitute parts?

A: All substitute parts are ROHS3 compliant. The Infineon IRF840PBF carries REACH Unaffected status. The Vishay Siliconix IRF840PBF carries REACH Affected status, and the IRF840PBF-BE3 carries Vendor Undefined REACH status. Applications requiring specific REACH compliance should verify the appropriate variant with the supplier.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. The parametric equivalence across all electrical specifications (Vdss, Id, Rds On, gate charge, capacitance, and temperature range) and mechanical compatibility (TO-220-3 package, through-hole mounting) support direct interchangeability. No circuit redesign or PCB modification is required.

Q: What is the operating temperature range for these parts?

A: All parts operate across the temperature range of -55°C to 150°C (junction temperature). This specification is identical across the main part and all substitutes.