IRF730ASTRRPBF N-Channel MOSFET 400V 5.5A Equivalent & Substitute Parts

Part Overview

The IRF730ASTRRPBF is an N-Channel MOSFET manufactured by Vishay Siliconix, rated for 400V drain-to-source voltage with 5.5A continuous drain current in a Surface Mount TO-263 (D2PAK) package. This device is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain identical electrical specifications and mechanical compatibility to ensure direct replacement capability without circuit redesign.

Substiute Parts

IRF730ASTRRPBF

Vishay SiliconixIn Stock: 880IRF730ASTRRPBF Datasheet

Current PartRFQ

IRF730ASTRLPBF

Vishay SiliconixIn Stock: 1530IRF730ASTRLPBF Datasheet

Parametric EquivalentRFQ

IRF730ASTRR

Vishay SiliconixIn Stock: 877IRF730ASTRR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IRF730ASTRRPBF are selected based on strict parametric equivalence across all electrical and mechanical specifications. The substitution criteria are:

Electrical Parameters (Must Match Exactly):

• Drain to Source Voltage (Vdss): 400V
• Continuous Drain Current (Id) @ 25°C: 5.5A (Tc)
• On-State Resistance (Rds On) @ 3.3A, 10V: 1 Ohm maximum
• Gate Threshold Voltage (Vgs(th)) @ 250µA: 4.5V maximum
• Gate Charge (Qg) @ 10V: 22 nC maximum
• Input Capacitance (Ciss) @ 25V: 600 pF maximum
• Maximum Gate Voltage (Vgs): ±30V
• Power Dissipation (Max): 74W (Tc)
• Operating Temperature Range: -55°C to 150°C (TJ)

Mechanical Parameters (Must Match Exactly):

• Mounting Type: Surface Mount
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Substitute parts identified below meet all specified electrical and mechanical requirements and are available in active product status or with improved compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

IRF730ASTRLPBF is the primary recommended substitute for the obsolete IRF730ASTRRPBF. This part maintains complete electrical and mechanical equivalence while offering active product status and ROHS3 compliance. The IRF730ASTRLPBF is supplied in Cut Tape (CT) packaging with 1443 units in stock, providing superior availability compared to the main part's 802 units.

IRF730ASTRR is an alternative substitute that maintains full electrical and mechanical equivalence and active product status. However, this part is RoHS non-compliant, making it unsuitable for applications requiring RoHS3 certification. Selection of this part should be limited to legacy systems or applications without RoHS compliance requirements.

For new designs and production environments requiring regulatory compliance, IRF730ASTRLPBF is the appropriate selection. For legacy or non-regulated applications, IRF730ASTRR provides an equivalent alternative with active availability.

Frequently Asked Questions (FAQ)

Q: Can IRF730ASTRLPBF be used as a direct replacement for IRF730ASTRRPBF?

A: Yes. IRF730ASTRLPBF is a direct substitute with identical electrical specifications (400V Vdss, 5.5A Id, 1 Ohm Rds On, 74W power dissipation) and mechanical compatibility (TO-263 D2PAK package, Surface Mount). The only differences are product status (Active vs. Obsolete) and packaging format (Cut Tape vs. standard).

Q: What is the difference between IRF730ASTRLPBF and IRF730ASTRR?

A: Both parts are electrically and mechanically equivalent to the main part. The primary difference is RoHS compliance status: IRF730ASTRLPBF is ROHS3 compliant, while IRF730ASTRR is RoHS non-compliant. For applications requiring RoHS certification, IRF730ASTRLPBF must be selected.

Q: Are there any package compatibility concerns when substituting these parts?

A: No. All three parts use identical TO-263-3 D2PAK (2 Leads + Tab) Surface Mount packages. Pin configuration and thermal characteristics are identical, allowing direct PCB-level substitution without layout modifications.

Q: What electrical parameters must remain constant for substitution?

A: All electrical parameters must match exactly: 400V Vdss, 5.5A continuous drain current, 1 Ohm maximum Rds On at 3.3A and 10V gate voltage, 4.5V maximum gate threshold voltage, 22 nC maximum gate charge, 600 pF maximum input capacitance, ±30V maximum gate voltage, 74W maximum power dissipation, and -55°C to 150°C operating temperature range.

Q: Why is the IRF730ASTRRPBF classified as obsolete?

A: The IRF730ASTRRPBF is marked obsolete in the manufacturer's product portfolio. Active equivalent alternatives (IRF730ASTRLPBF and IRF730ASTRR) are available with identical specifications, making the original part unnecessary for new procurement.

Q: Can I mix IRF730ASTRLPBF and IRF730ASTRR in the same circuit?

A: Yes, from an electrical and mechanical standpoint, both parts are fully equivalent and can be used interchangeably in the same circuit. However, if RoHS compliance is required for the final product, only IRF730ASTRLPBF should be used to maintain regulatory certification.