IRFU310 N-Channel MOSFET 400V 1.7A TO-251AA Equivalent & Substitute Parts

Part Overview

The IRFU310 is an N-Channel Metal Oxide Semiconductor Field Effect Transistor (MOSFET) rated for 400V drain-to-source voltage with a continuous drain current of 1.7A at 25°C. The device is housed in a TO-251AA through-hole package and is designed for general-purpose switching and amplification applications requiring moderate voltage and current handling capabilities.

The IRFU310 is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity, ensure component availability for production, and support long-term system maintenance and repair operations.

Substiute Parts

IRFU310

Vishay SiliconixIn Stock: 6097IRFU310 Datasheet

Current PartRFQ

IRFU310PBF

Vishay SiliconixIn Stock: 79145IRFU310PBF Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRFU310 is determined by electrical and mechanical parameter equivalence. The following criteria establish valid substitution:

Electrical Parameters (Must Match):

• FET Type: N-Channel
• Technology: MOSFET (Metal Oxide)
• Drain to Source Voltage (Vdss): 400V
• Continuous Drain Current (Id) @ 25°C: 1.7A (Tc)
• Drive Voltage (Max Rds On): 10V
• Rds On (Max) @ Id, Vgs: 3.6 Ohm @ 1A, 10V
• Vgs(th) (Max) @ Id: 4V @ 250µA
• Gate Charge (Qg) (Max) @ Vgs: 12 nC @ 10V
• Vgs (Max): ±20V
• Input Capacitance (Ciss) (Max) @ Vds: 170 pF @ 25V
• Power Dissipation (Max): 2.5W (Ta), 25W (Tc)
• Operating Temperature Range: -55°C to 150°C (TJ)

Mechanical Parameters (Must Match):

• Mounting Type: Through Hole
• Package / Case: TO-251-3 Short Leads, IPak, TO-251AA

Substitute parts meeting all electrical and mechanical parameters are classified as parametric equivalents and are suitable for direct replacement in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The IRFU310PBF is a parametric equivalent substitute for the IRFU310. All electrical and mechanical parameters are identical, ensuring functional compatibility in circuit applications.

Product Status Consideration: The IRFU310 is classified as obsolete, while the IRFU310PBF is active. The IRFU310PBF is the recommended selection for new designs and ongoing production requirements due to its active product status and assured long-term availability.

Compliance Consideration: The IRFU310 is RoHS non-compliant. The IRFU310PBF is ROHS3 compliant. For applications subject to RoHS regulations or customer requirements mandating RoHS compliance, the IRFU310PBF is the appropriate selection.

Packaging Consideration: The IRFU310PBF is supplied in tube packaging, which is standard for active production components. Both parts share identical TO-251AA through-hole package geometry and pin configuration, ensuring direct mechanical and electrical interchangeability on printed circuit boards.

Frequently Asked Questions (FAQ)

Q: Can the IRFU310PBF be used as a direct replacement for the IRFU310?

A: Yes. The IRFU310PBF is a parametric equivalent with identical electrical specifications (400V Vdss, 1.7A continuous drain current, 3.6 Ohm Rds On, ±20V Vgs, -55°C to 150°C operating range) and identical mechanical packaging (TO-251AA through-hole). Direct substitution is supported without circuit modification.

Q: What is the primary difference between the IRFU310 and IRFU310PBF?

A: The IRFU310 is obsolete and RoHS non-compliant. The IRFU310PBF is active and ROHS3 compliant. Electrical and mechanical specifications are identical.

Q: Are there any pin configuration differences between these parts?

A: No. Both the IRFU310 and IRFU310PBF use the TO-251AA package with identical pin configuration and lead geometry. No PCB layout modifications are required.

Q: What does the "PBF" suffix in IRFU310PBF indicate?

A: The "PBF" suffix indicates lead-free (Pb-free) and RoHS compliance. This designation confirms the part meets ROHS3 environmental and material composition standards.

Q: Can the IRFU310 be used in new designs?

A: The IRFU310 is obsolete. For new designs, the IRFU310PBF is the appropriate selection due to its active product status, RoHS compliance, and assured availability.

Q: Are there any thermal or electrical performance differences between the IRFU310 and IRFU310PBF?

A: No. Both parts have identical power dissipation ratings (2.5W at Ta, 25W at Tc), operating temperature range (-55°C to 150°C), and all electrical parameters. Thermal and electrical performance are equivalent.

Q: What packaging formats are available for the IRFU310PBF?

A: The IRFU310PBF is supplied in tube packaging, which is standard for active production components. The IRFU310 packaging format is not specified in the available data.