IRFR320TR N-Channel MOSFET 400V 3.1A Equivalent & Substitute Parts

Part Overview

The IRFR320TR is an N-Channel Metal Oxide Semiconductor Field Effect Transistor (MOSFET) manufactured by Vishay Siliconix, rated for 400V drain-to-source voltage with 3.1A continuous drain current at 25°C. The device is packaged in a DPAK (TO-252-3) surface mount configuration and is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active product lines are necessary to maintain design continuity and ensure long-term component availability for new production and field replacements.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Technology	MOSFET (Metal Oxide)	—
Drain to Source Voltage (Vdss)	400	V
Current - Continuous Drain (Id) @ 25°C	3.1	A (Tc)
Drive Voltage (Max Rds On)	10	V
Rds On (Max) @ Id, Vgs	1.8	Ohm @ 1.9A, 10V
Vgs(th) (Max) @ Id	4	V @ 250µA
Gate Charge (Qg) (Max) @ Vgs	20	nC @ 10V
Vgs (Max)	±20	V
Input Capacitance (Ciss) (Max) @ Vds	350	pF @ 25V
Power Dissipation (Max)	2.5 (Ta), 42 (Tc)	W
Operating Temperature	-55 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the IRFR320TR is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Drain to Source Voltage (Vdss): Must equal or exceed 400V
Continuous Drain Current (Id): Must equal or exceed 3.1A at 25°C
On-State Resistance (Rds On): Must not exceed 1.8 Ohm at specified gate voltage
Gate Threshold Voltage (Vgs(th)): Must be within acceptable switching range
Maximum Gate Voltage (Vgs Max): Must accommodate ±20V or higher
Operating Temperature Range: Must span -55°C to 150°C

Mechanical Compatibility Criteria:

Mounting Type: Surface Mount required
Package / Case: TO-252-3 DPAK configuration with 2 Leads + Tab

Substitute parts are grouped into two categories:

Category 1: Direct Parametric Equivalents (Vishay Siliconix IRFR320 Series) These parts maintain identical electrical specifications and package configuration. They differ only in product status (Active vs. Obsolete) and packaging format (Tape & Reel, Cut Tape, or bulk). All parts share the base product number IRFR320 and are fully interchangeable at the circuit level.

Category 2: Manufacturer-Recommended Alternatives These parts meet or exceed the electrical requirements of the IRFR320TR but originate from different manufacturers (STMicroelectronics, Renesas Electronics). They maintain the same package family (DPAK/TO-252-3) and operating temperature range. Electrical parameters may differ within acceptable margins for the application.

Parameter Comparison

Part Number	Manufacturer	Product Status	Vdss (V)	Id @ 25°C (A)	Rds On (Ohm)	Vgs(th) (V)	Vgs Max (V)	Qg (nC)	Ciss (pF)	Power Dissipation (W)	Package	Mounting
IRFR320TR	Vishay Siliconix	Obsolete	400	3.1 (Tc)	1.8 @ 1.9A, 10V	4 @ 250µA	±20	20 @ 10V	350 @ 25V	2.5 (Ta), 42 (Tc)	DPAK	Surface Mount
IRFR320PBF-BE3	Vishay Siliconix	Active	400	3.1 (Tc)	1.8 @ 1.9A, 10V	4 @ 250µA	±20	20 @ 10V	350 @ 25V	2.5 (Ta), 42 (Tc)	TO-252AA	Surface Mount
IRFR320TRPBF	Vishay Siliconix	Active	400	3.1 (Tc)	1.8 @ 1.9A, 10V	4 @ 250µA	±20	20 @ 10V	350 @ 25V	2.5 (Ta), 42 (Tc)	DPAK	Surface Mount
IRFR320TRPBF-BE3	Vishay Siliconix	Active	400	3.1 (Tc)	1.8 @ 1.9A, 10V	4 @ 250µA	±20	20 @ 10V	350 @ 25V	2.5 (Ta), 42 (Tc)	TO-252AA	Surface Mount
IRFR320TRRPBF	Vishay Siliconix	Active	400	3.1 (Tc)	1.8 @ 1.9A, 10V	4 @ 250µA	±20	20 @ 10V	350 @ 25V	2.5 (Ta), 42 (Tc)	DPAK	Surface Mount
SIHFR320TR-GE3	Vishay Siliconix	Active	400	3.1 (Tc)	1.8 @ 1.9A, 10V	4 @ 250µA	±20	20 @ 10V	350 @ 25V	2.5 (Ta), 42 (Tc)	TO-252AA	Surface Mount
SIHFR320TRL-GE3	Vishay Siliconix	Active	400	3.1 (Tc)	1.8 @ 1.9A, 10V	4 @ 250µA	±20	20 @ 10V	350 @ 25V	2.5 (Ta), 42 (Tc)	TO-252AA	Surface Mount
STD5NK40ZT4	STMicroelectronics	Active	400	3 (Tc)	1.8 @ 1.5A, 10V	4.5 @ 50µA	±30	17 @ 10V	305 @ 25V	45 (Tc)	DPAK	Surface Mount
STD7NK40ZT4	STMicroelectronics	Active	400	5.4 (Tc)	1 @ 2.7A, 10V	4.5 @ 50µA	±30	26 @ 10V	535 @ 25V	70 (Tc)	DPAK	Surface Mount
RJK5030DPD-00#J2	Renesas Electronics Corporation	Active	500	5 (Ta)	1.6 @ 2A, 10V	—	±30	—	550 @ 25V	41.7 (Tc)	MP-3A	Surface Mount

Engineering Selection Recommendations

Direct Replacement (Vishay Siliconix IRFR320 Series)

The following parts provide direct electrical and mechanical equivalence to the IRFR320TR:

IRFR320TRPBF: Active product status with identical electrical specifications. Available in Cut Tape & Digi-Reel® packaging with 17,300 units in stock. RoHS3 compliant. Recommended for new production designs requiring maximum availability.
IRFR320TRPBF-BE3: Active product status with identical electrical specifications. Available in Tape & Reel packaging with 2,810 units in stock. Suitable for automated assembly processes.
IRFR320TRRPBF: Active product status with identical electrical specifications. Available in Tape & Reel packaging with 4,100 units in stock. RoHS3 compliant.
SIHFR320TR-GE3: Active product status with identical electrical specifications. Available in Tape & Reel packaging with 3,300 units in stock. Represents Vishay's current generation equivalent.
SIHFR320TRL-GE3: Active product status with identical electrical specifications. Available in Tape & Reel packaging with 3,943 units in stock.
IRFR320PBF-BE3: Active product status with identical electrical specifications. Available in Tape & Reel packaging with 889 units in stock.

Manufacturer-Recommended Alternatives (STMicroelectronics)

STD5NK40ZT4: STMicroelectronics SuperMESH™ series. Meets 400V Vdss requirement with 3A continuous drain current. Rds On of 1.8 Ohm matches the IRFR320TR specification. Gate charge of 17 nC is lower, resulting in faster switching characteristics. Extended Vgs Max of ±30V provides additional gate drive margin. 17,910 units in stock. RoHS3 compliant. Suitable for applications where improved switching performance is beneficial.
STD7NK40ZT4: STMicroelectronics SuperMESH™ series. Exceeds 400V Vdss requirement with 5.4A continuous drain current and 1 Ohm Rds On. Provides enhanced current handling and reduced on-state losses. 35,045 units in stock. RoHS3 compliant. Recommended for applications requiring higher current capacity or lower power dissipation.

Manufacturer-Recommended Alternative (Renesas Electronics)

RJK5030DPD-00#J2: Renesas N-Channel MOSFET rated for 500V Vdss with 5A continuous drain current. Exceeds voltage and current specifications of the IRFR320TR. Rds On of 1.6 Ohm at 2A, 10V provides superior on-state performance. Extended Vgs Max of ±30V. 955 units in stock. RoHS3 compliant. Suitable for applications requiring higher voltage margin or improved thermal performance.

Frequently Asked Questions (FAQ)

Q: Can IRFR320TRPBF be used as a direct replacement for IRFR320TR?

A: Yes. IRFR320TRPBF is electrically and mechanically identical to IRFR320TR. Both devices share identical Vdss (400V), Id (3.1A), Rds On (1.8 Ohm), and package configuration (DPAK). The primary difference is product status: IRFR320TR is obsolete while IRFR320TRPBF is active. IRFR320TRPBF is the recommended replacement for new designs and field replacements.

Q: What is the difference between IRFR320TRPBF and IRFR320TRPBF-BE3?

A: Both parts are electrically identical with identical electrical specifications. The difference is packaging format: IRFR320TRPBF is supplied in Cut Tape & Digi-Reel® format, while IRFR320TRPBF-BE3 is supplied in Tape & Reel format. Selection depends on assembly process requirements and tape specifications.

Q: Can STD5NK40ZT4 replace IRFR320TR in all applications?

A: STD5NK40ZT4 meets the core electrical requirements of IRFR320TR with matching 400V Vdss and 1.8 Ohm Rds On. However, continuous drain current is 3A versus 3.1A for IRFR320TR. Gate charge is lower (17 nC vs. 20 nC), resulting in faster switching. Applications sensitive to switching speed or requiring the full 3.1A rating should be evaluated individually.

Q: Is STD7NK40ZT4 suitable for IRFR320TR replacement?

A: STD7NK40ZT4 exceeds IRFR320TR specifications with 5.4A continuous drain current and 1 Ohm Rds On. It maintains 400V Vdss and DPAK package compatibility. The device is suitable for replacement in applications where higher current capacity or lower on-state losses are acceptable. Thermal design may require adjustment due to increased power dissipation capability (70W vs. 42W).

Q: What is the difference between DPAK and TO-252AA package designations?

A: DPAK and TO-252AA are equivalent package designations for the same physical form factor: a 3-lead surface mount package with 2 leads plus tab. Both refer to the same mechanical and electrical interface. Parts designated as DPAK or TO-252AA are mechanically interchangeable.

Q: Can RJK5030DPD-00#J2 replace IRFR320TR?

A: RJK5030DPD-00#J2 exceeds IRFR320TR specifications with 500V Vdss, 5A continuous drain current, and 1.6 Ohm Rds On. The device is mechanically compatible (surface mount DPAK family). Applications requiring higher voltage margin or improved current handling can use this device. Thermal performance is enhanced (41.7W vs. 42W). Compatibility should be verified for applications with tight voltage or current specifications.

Q: Are all substitute parts RoHS3 compliant?

A: IRFR320TRPBF, IRFR320TRRPBF, STD5NK40ZT4, STD7NK40ZT4, and RJK5030DPD-00#J2 are RoHS3 compliant. IRFR320TR is RoHS non-compliant. IRFR320PBF-BE3, IRFR320TRPBF-BE3, SIHFR320TR-GE3, and SIHFR320TRL-GE3 compliance status is not specified in the provided data. Verify RoHS compliance requirements for your application before final part selection.

Q: What is the operating temperature range for substitute parts?

A: All substitute parts maintain the operating temperature range of -55°C to 150°C (TJ), matching the IRFR320TR specification. This ensures thermal compatibility across all recommended alternatives.

Q: Which substitute part has the highest inventory availability?

A: STD7NK40ZT4 has the highest inventory with 35,045 units in stock, followed by STD5NK40ZT4 with 17,910 units and IRFR320TRPBF with 17,300 units. For immediate availability of direct equivalents, IRFR320TRPBF is the recommended choice.

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