IRF740AL MOSFET N-Channel 400V 10A Equivalent & Substitute Parts

Part Overview

The IRF740AL is an N-Channel MOSFET manufactured by Vishay Siliconix, rated for 400V drain-to-source voltage with 10A continuous drain current. This device is packaged in a through-hole I2PAK (TO-262-3) configuration and is designed for high-voltage switching applications. The IRF740AL carries an obsolete product status, making identification of equivalent and substitute parts essential for ongoing design support, maintenance, and production continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with compatible parameters.

Substiute Parts

IRF740AL

Vishay SiliconixIn Stock: 32593IRF740AL Datasheet

Current PartRFQ

IRF740ALPBF

Vishay SiliconixIn Stock: 1992IRF740ALPBF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IRF740AL are identified based on strict electrical and mechanical parameter matching. The substitution criteria are:

Electrical Parameters (Must Match):

• Drain-to-Source Voltage (Vdss): 400 V
• Continuous Drain Current (Id): 10 A (Tc)
• On-State Resistance (Rds On): 550 mOhm @ 6A, 10V
• Gate Threshold Voltage (Vgs(th)): 4 V @ 250µA
• Gate Charge (Qg): 36 nC @ 10V
• Input Capacitance (Ciss): 1030 pF @ 25V
• Power Dissipation: 3.1 W (Ta), 125 W (Tc)
• Operating Temperature Range: -55°C to 150°C (TJ)
• FET Type: N-Channel
• Technology: MOSFET (Metal Oxide)

Mechanical Parameters (Must Match):

• Mounting Type: Through Hole
• Package / Case: TO-262-3 Long Leads, I2PAK, TO-262AA

Substitute parts may differ in product status, packaging format (bulk vs. tube), and compliance certifications, provided all electrical and mechanical parameters remain identical.

Parameter Comparison

Engineering Selection Recommendations

IRF740ALPBF as Primary Substitute:

The IRF740ALPBF is a direct functional equivalent to the IRF740AL with identical electrical and mechanical specifications across all critical parameters. The primary distinction is product status: IRF740ALPBF carries an Active status, ensuring ongoing availability and manufacturing support, whereas the IRF740AL is classified as Obsolete.

Compliance Considerations:

The IRF740ALPBF achieves ROHS3 compliance, whereas the IRF740AL is RoHS non-compliant. For applications subject to RoHS directives or customer requirements mandating RoHS compliance, the IRF740ALPBF is the appropriate selection. Both parts maintain identical REACH Unaffected and EAR99 export classification status.

Packaging and Inventory:

The IRF740ALPBF is supplied in tube packaging format, whereas the IRF740AL is available in bulk. Both parts share identical through-hole I2PAK (TO-262-3) physical form factors and are suitable for identical PCB assembly processes. Current inventory availability differs: IRF740AL has 32,565 pieces in stock, while IRF740ALPBF has 1,900 pieces in stock.

Application Continuity:

For new designs or production transitions, the IRF740ALPBF is the recommended selection due to active product status and regulatory compliance. For existing designs currently using IRF740AL, the IRF740ALPBF provides seamless substitution without circuit redesign or performance modification.

Frequently Asked Questions (FAQ)

Q: Can IRF740ALPBF be used as a direct replacement for IRF740AL in existing circuits?

A: Yes. The IRF740ALPBF is electrically and mechanically identical to the IRF740AL across all specified parameters. No circuit modifications, PCB layout changes, or performance adjustments are required. Both devices share identical gate drive requirements, switching characteristics, thermal ratings, and through-hole I2PAK packaging.

Q: What is the primary reason to substitute IRF740AL with IRF740ALPBF?

A: The IRF740AL is classified as Obsolete, creating supply chain risk and limiting long-term availability. The IRF740ALPBF maintains Active product status with ongoing manufacturing support. Additionally, IRF740ALPBF achieves ROHS3 compliance, meeting regulatory requirements for applications subject to RoHS directives.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts are specified with identical drain-to-source voltage (400V), continuous drain current (10A), on-state resistance (550 mOhm @ 6A, 10V), gate threshold voltage (4V), gate charge (36 nC), input capacitance (1030 pF), power dissipation (3.1W Ta / 125W Tc), and operating temperature range (-55°C to 150°C).

Q: Do these parts require different PCB footprints or mounting procedures?

A: No. Both IRF740AL and IRF740ALPBF use identical through-hole I2PAK (TO-262-3 Long Leads) packaging. PCB footprints, lead spacing, and mounting procedures are identical. No PCB redesign is necessary.

Q: What is the difference in packaging format between these parts?

A: IRF740AL is supplied in bulk packaging, while IRF740ALPBF is supplied in tube packaging. This difference affects order quantities and handling procedures but does not impact electrical performance or physical form factor.

Q: Are moisture sensitivity levels identical for both parts?

A: Yes. Both IRF740AL and IRF740ALPBF carry Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture-related storage or handling restrictions.

Q: Do these parts share the same export classification?

A: Yes. Both parts are classified under ECCN EAR99 and HTSUS 8541.29.0095, maintaining identical export control status.

Q: Can IRF740ALPBF be used in applications originally designed for IRF740AL without thermal analysis updates?

A: Yes. Thermal characteristics are identical: 3.1W maximum power dissipation at ambient temperature (Ta) and 125W at case temperature (Tc). Thermal management designs, heatsink requirements, and thermal analysis remain unchanged.