IRFP440 Equivalent & Substitute Parts

Part Overview

The IRFP440 is an N-Channel MOSFET rated for 500V drain-to-source voltage with 8.8A continuous drain current and 150W power dissipation in a Through Hole TO-247AC package. This device is classified as Obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement. The IRFP440 series provides high-voltage switching capability suitable for power conversion applications requiring robust gate-drive characteristics and thermal performance within the specified operating range of -55°C to 150°C junction temperature.

Substiute Parts

IRFP440

Vishay SiliconixIn Stock: 2052IRFP440 Datasheet

Current PartRFQ

IRFP440PBF

Vishay SiliconixIn Stock: 6554IRFP440PBF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRFP440 is determined by electrical and mechanical parameter equivalence across the following criteria:

Electrical Parameters (Critical for Functional Equivalence):

• Drain to Source Voltage (Vdss): 500V
• Continuous Drain Current (Id): 8.8A at 25°C
• On-State Resistance (Rds On): 850 mOhm maximum at specified conditions
• Gate Threshold Voltage (Vgs(th)): 4V maximum
• Gate Charge (Qg): 63 nC maximum
• Input Capacitance (Ciss): 1300 pF maximum
• Power Dissipation: 150W
• Gate Voltage Range (Vgs): ±20V
• Operating Temperature: -55°C to 150°C

Mechanical Parameters (Required for Physical Compatibility):

• Package Type: TO-247-3 (Through Hole)
• Mounting Type: Through Hole

Substitute parts must maintain identical electrical specifications and package configuration to ensure direct replacement capability without circuit redesign or thermal management modifications.

Parameter Comparison

Engineering Selection Recommendations

The IRFP440PBF is a direct electrical and mechanical equivalent to the IRFP440, with identical performance specifications across all critical parameters: voltage rating, current capacity, on-state resistance, gate characteristics, and thermal performance. Both devices are housed in the TO-247-3 Through Hole package and maintain the same operating temperature range.

Key Differentiation Factors:

Product Status: The IRFP440 is classified as Obsolete, while the IRFP440PBF maintains Active status. For new designs and ongoing procurement, the IRFP440PBF is the appropriate selection to ensure supply chain continuity and manufacturer support.

Regulatory Compliance: The IRFP440PBF is ROHS3 Compliant and REACH Affected, whereas the IRFP440 is RoHS non-compliant and REACH Unaffected. Applications subject to RoHS or REACH regulatory requirements must use the IRFP440PBF.

Packaging: The IRFP440PBF is supplied in Tube packaging, while the original IRFP440 packaging specification is not detailed. Both devices are functionally interchangeable at the circuit level.

Inventory Availability: The IRFP440PBF has significantly higher inventory availability (6450 units) compared to the IRFP440 (2024 units), supporting procurement reliability for production applications.

For applications requiring the 500V, 8.8A N-Channel MOSFET in TO-247-3 package configuration, the IRFP440PBF is the recommended substitute for the obsolete IRFP440.

Frequently Asked Questions (FAQ)

Q: Can the IRFP440PBF be used as a direct replacement for the IRFP440 in existing designs?

A: Yes. The IRFP440PBF is electrically and mechanically identical to the IRFP440 across all specified parameters. Both devices feature 500V Vdss, 8.8A continuous drain current, 850 mOhm Rds On, and TO-247-3 Through Hole packaging. No circuit modifications are required for substitution.

Q: What is the primary reason to transition from IRFP440 to IRFP440PBF?

A: The IRFP440 is classified as Obsolete, creating long-term supply and support risks. The IRFP440PBF is an Active product with superior inventory availability and regulatory compliance (ROHS3 Compliant), ensuring sustained procurement capability and design longevity.

Q: Are there thermal performance differences between the IRFP440 and IRFP440PBF?

A: No. Both devices are rated for 150W maximum power dissipation and operate across the identical temperature range of -55°C to 150°C junction temperature. Thermal management requirements remain unchanged.

Q: Does the IRFP440PBF require different gate drive circuitry?

A: No. The gate characteristics are identical: 4V maximum gate threshold voltage, ±20V maximum gate voltage, and 63 nC gate charge. Existing gate drive designs require no modification.

Q: What is the significance of the ROHS3 Compliant status of the IRFP440PBF?

A: ROHS3 Compliance indicates the device meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. This is mandatory for applications in regulated markets and is a standard requirement for new component procurement.

Q: Are the TO-247-3 packages of both devices physically identical?

A: Yes. Both the IRFP440 and IRFP440PBF use the TO-247AC Through Hole package configuration, ensuring identical PCB footprint, lead spacing, and mounting requirements.

Q: What is the difference between REACH Unaffected and REACH Affected status?

A: REACH Affected indicates the component is subject to European REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) regulations and requires compliance documentation. REACH Unaffected indicates no REACH regulatory obligations. For applications in regulated markets, REACH Affected status (IRFP440PBF) is the appropriate selection.