IRF730ALPBF Equivalent & Substitute Parts

Part Overview

The IRF730ALPBF is an N-Channel MOSFET manufactured by Vishay Siliconix, rated for 400V drain-to-source voltage with 5.5A continuous drain current. The device is packaged in I2PAK (TO-262-3 Long Leads) configuration and is designed for through-hole mounting applications. The IRF730ALPBF is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design support and procurement requirements. Substitute parts must maintain electrical performance specifications while accommodating packaging and availability constraints.

Substiute Parts

IRF730ALPBF

Vishay SiliconixIn Stock: 4974IRF730ALPBF Datasheet

Current PartRFQ

IRF730APBF

Vishay SiliconixIn Stock: 3458IRF730APBF Datasheet

MFR RecommendedRFQ

IRF730AL

Vishay SiliconixIn Stock: 1214IRF730AL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IRF730ALPBF are classified based on electrical parameter equivalence and packaging compatibility. All identified substitutes maintain identical electrical specifications across voltage rating, current capacity, on-state resistance, gate charge, and thermal performance. Substitution logic is determined by the following key parameters:

Electrical Equivalence Criteria:

• Drain to Source Voltage (Vdss): 400V
• Continuous Drain Current (Id): 5.5A @ 25°C
• On-State Resistance (Rds On): 1 Ohm @ 3.3A, 10V
• Gate Threshold Voltage (Vgs(th)): 4.5V @ 250µA
• Gate Charge (Qg): 22 nC @ 10V
• Power Dissipation: 74W (Tc)
• Operating Temperature: -55°C to 150°C

Packaging Considerations: Substitutes are differentiated by package type (I2PAK versus TO-220AB) and product status (Active versus Obsolete). Package selection depends on circuit board layout and thermal management requirements.

Parameter Comparison

Engineering Selection Recommendations

IRF730APBF (MFR Recommended Substitute): The IRF730APBF is the manufacturer-recommended substitute for the obsolete IRF730ALPBF. This part maintains complete electrical equivalence across all specified parameters. The primary difference is packaging: IRF730APBF uses TO-220AB configuration instead of I2PAK. The IRF730APBF carries Active product status and ROHS3 compliance certification, ensuring long-term availability and regulatory alignment. Selection of IRF730APBF is appropriate for applications where TO-220AB package footprint is compatible with circuit board design.

IRF730AL (Parametric Equivalent Substitute): The IRF730AL provides parametric equivalence with identical electrical specifications and I2PAK packaging matching the original IRF730ALPBF. This part is classified as Active, supporting ongoing procurement. However, IRF730AL carries RoHS non-compliant status, which may present regulatory constraints in applications subject to RoHS requirements. Selection of IRF730AL is appropriate for applications where I2PAK package retention is required and RoHS compliance is not mandated.

Selection Criteria:

• For new designs and RoHS-compliant applications: IRF730APBF
• For I2PAK package retention without RoHS requirements: IRF730AL
• For legacy system maintenance with identical packaging: IRF730AL

Frequently Asked Questions (FAQ)

Q: Can IRF730APBF directly replace IRF730ALPBF in existing circuit boards?

A: IRF730APBF provides complete electrical equivalence but uses TO-220AB packaging instead of I2PAK. Direct board-level replacement requires PCB layout modification to accommodate the different package footprint and pin configuration. Electrical performance is identical.

Q: What is the primary difference between IRF730APBF and IRF730AL?

A: Both parts are electrically equivalent to IRF730ALPBF. IRF730APBF uses TO-220AB packaging and carries ROHS3 compliance. IRF730AL retains I2PAK packaging but is RoHS non-compliant. Package selection depends on circuit board design and regulatory requirements.

Q: Is IRF730AL suitable for RoHS-regulated applications?

A: No. IRF730AL is classified as RoHS non-compliant. For applications requiring RoHS compliance, IRF730APBF is the appropriate selection despite its different package type.

Q: Are all three parts (IRF730ALPBF, IRF730APBF, IRF730AL) electrically interchangeable?

A: Yes, all three parts share identical electrical specifications: 400V Vdss, 5.5A continuous drain current, 1 Ohm Rds On, 22 nC gate charge, and 74W power dissipation. Interchangeability is limited by package compatibility and board layout constraints.

Q: What is the inventory status for substitute parts?

A: IRF730APBF has 3400 units in stock (Active status). IRF730AL has 1163 units in stock (Active status). Both substitutes offer superior availability compared to the obsolete IRF730ALPBF (4900 units remaining stock).

Q: Can I use IRF730APBF in a design originally specified for I2PAK packaging?

A: IRF730APBF requires PCB redesign due to its TO-220AB package. If I2PAK package retention is mandatory, IRF730AL is the appropriate selection. If package change is acceptable, IRF730APBF offers ROHS3 compliance and manufacturer recommendation.

Q: What certifications apply to each substitute part?

A: IRF730APBF: ROHS3 Compliant, REACH Unaffected, EAR99, HTSUS 8541.29.0095. IRF730AL: RoHS non-compliant, REACH Unaffected, EAR99, HTSUS 8541.29.0095. Both parts carry Moisture Sensitivity Level 1 (Unlimited).