IRFS3307TRLPBF N-Channel 75V 120A MOSFET Equivalent & Substitute Parts

Part Overview

The IRFS3307TRLPBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 75V drain-to-source voltage and 120A continuous drain current in a D2PAK surface mount package. This device is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The HEXFET® series device operates across a temperature range of -55°C to 175°C and dissipates up to 200W at the case temperature. Substitute parts must maintain electrical compatibility within the specified voltage, current, and thermal parameters while accommodating the D2PAK package form factor.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	75	V
Continuous Drain Current (Id) @ 25°C	120	A
On-State Resistance (Rds On) @ 75A, 10V	6.3	mOhm
Gate Threshold Voltage (Vgs(th)) @ 150µA	4	V
Gate Charge (Qg) @ 10V	180	nC
Power Dissipation (Max)	200	W
Operating Temperature Range	-55 to 175	°C
Package Type	D2PAK (TO-263-3)	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following electrical and mechanical criteria:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 75V
Continuous Drain Current (Id): Must equal or exceed 120A at 25°C
Package Type: Must be D2PAK (TO-263-3) surface mount
Operating Temperature Range: Must span -55°C to 175°C minimum
RoHS Compliance: ROHS3 Compliant status required

Secondary Compatibility Parameters:

On-State Resistance (Rds On): Lower values indicate improved performance
Gate Charge (Qg): Lower values reduce switching losses
Power Dissipation: Higher ratings provide thermal margin
Vgs(th): Must be compatible with 10V drive voltage

Parts are grouped into two categories: Direct Equivalents (matching all primary criteria) and Functional Substitutes (meeting primary criteria with acceptable parameter variations for specific applications).

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id (A)	Rds On (mOhm)	Qg (nC)	Power (W)	Status	Package
IRFS3307TRLPBF	Infineon	75	120	6.3	180	200	Obsolete	D2PAK
IRFS3307ZTRLPBF	Infineon	75	120	5.8	110	230	Active	D2PAK
STB140NF75T4	STMicroelectronics	75	120	7.5	218	310	Active	D2PAK
PSMN5R0-80BS,118	Nexperia	80	100	5.1	101	270	Active	D2PAK
PSMN6R5-80BS,118	Nexperia	80	100	6.9	71	210	Active	D2PAK
PSMN008-75B,118	Nexperia	75	75	8.5	122.8	230	Active	D2PAK
BUK9609-75A,118	NXP	75	75	8.5	—	230	Active	D2PAK
IXTA110N055T2	IXYS	55	110	6.6	57	180	Active	TO-263AA
BUK9606-55A,118	Nexperia	55	75	5.8	—	300	Obsolete	D2PAK
HUF75345S3ST	onsemi	55	75	7	275	325	Active	D2PAK
PSMN7R6-60BS,118	Nexperia	60	92	7.8	38.7	149	Active	D2PAK

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

IRFS3307ZTRLPBF is the manufacturer-recommended direct equivalent. This part maintains identical voltage and current ratings (75V, 120A) with improved electrical characteristics: reduced on-state resistance (5.8 mOhm vs. 6.3 mOhm), lower gate charge (110 nC vs. 180 nC), and higher power dissipation rating (230W vs. 200W). The device is in active production status with ROHS3 compliance and unlimited moisture sensitivity level. Packaging is D2PAK with Cut Tape and Digi-Reel® availability.

Voltage and Current Matched Substitute:

STB140NF75T4 from STMicroelectronics provides exact voltage (75V) and current (120A) matching with superior power dissipation (310W). This STripFET™ III series device is in active production and ROHS3 compliant. On-state resistance is slightly higher (7.5 mOhm), and gate charge is elevated (218 nC), resulting in marginally higher switching losses but improved thermal performance.

Reduced Current Substitutes (75V Rating):

PSMN008-75B,118 operates at 75V with reduced continuous current (75A). This part is suitable for applications where the full 120A rating is not required. It offers active production status, ROHS3 compliance, and D2PAK packaging with improved on-state resistance characteristics.

Elevated Voltage Substitutes (80V Rating):

PSMN5R0-80BS,118 and PSMN6R5-80BS,118 provide 80V ratings with 100A continuous current. These parts exceed the original voltage specification, providing additional design margin. Both are in active production with ROHS3 compliance and D2PAK packaging. PSMN5R0-80BS,118 offers superior on-state resistance (5.1 mOhm) and lower gate charge (101 nC).

Lower Voltage Substitutes (55V-60V Rating):

Parts rated below 75V (IXTA110N055T2, BUK9606-55A,118, HUF75345S3ST, PSMN7R6-60BS,118) are not recommended for direct substitution in applications requiring the full 75V rating. These devices are suitable only for circuits with maximum operating voltages below their respective Vdss ratings.

Frequently Asked Questions (FAQ)

Q: Can IRFS3307ZTRLPBF directly replace IRFS3307TRLPBF in all applications?

A: Yes. IRFS3307ZTRLPBF is the manufacturer-recommended direct equivalent with identical voltage and current ratings. It maintains full compatibility with the original part's electrical specifications and D2PAK package. The improved characteristics (lower Rds On, reduced gate charge, higher power rating) provide enhanced performance without requiring circuit modifications.

Q: What is the primary difference between IRFS3307TRLPBF and STB140NF75T4?

A: Both parts share identical 75V and 120A ratings with D2PAK packaging. The primary difference is power dissipation capability: STB140NF75T4 dissipates 310W versus 200W for the original part. STB140NF75T4 exhibits slightly higher on-state resistance (7.5 mOhm vs. 6.3 mOhm) and gate charge (218 nC vs. 180 nC). Selection depends on thermal management requirements and switching frequency constraints.

Q: Why are 55V and 60V rated parts listed if they do not meet the 75V specification?

A: Lower voltage parts are included for reference and cross-reference purposes only. They are not suitable substitutes for applications requiring 75V operation. These parts may be used only in circuits with maximum operating voltages below their respective Vdss ratings. Exceeding the Vdss rating results in device failure.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitute parts listed in the active production category are ROHS3 compliant. Obsolete parts (BUK9606-55A,118) maintain ROHS3 compliance but are no longer in production. Verify compliance status with the manufacturer for any parts sourced from secondary distributors.

Q: What packaging options are available for substitutes?

A: All substitute parts use D2PAK (TO-263-3) surface mount packaging, maintaining mechanical compatibility with the original IRFS3307TRLPBF. Packaging variations include Cut Tape (CT), Digi-Reel®, Tape & Reel (TR), Tube, and Bulk options depending on the specific part number and manufacturer. Verify packaging availability with your supplier before design finalization.

Q: Can PSMN5R0-80BS,118 or PSMN6R5-80BS,118 be used in place of IRFS3307TRLPBF?

A: These parts are functionally compatible for applications where the 75V specification can tolerate an 80V rated device. The elevated voltage rating provides additional design margin. However, continuous drain current is reduced to 100A, making these parts unsuitable for circuits requiring the full 120A rating. Verify current requirements before substitution.

Q: What is the significance of gate charge (Qg) differences between parts?

A: Gate charge directly affects switching losses and frequency response. Lower gate charge (IRFS3307ZTRLPBF at 110 nC) reduces switching losses compared to higher values (STB140NF75T4 at 218 nC). In high-frequency applications, lower gate charge improves efficiency. In low-frequency applications, this difference is negligible. Select based on your circuit's operating frequency and thermal budget.

Q: Is IXTA110N055T2 a suitable substitute despite its 55V rating?

A: No. IXTA110N055T2 is rated for 55V maximum, which is below the 75V specification of IRFS3307TRLPBF. Using this part in a 75V circuit results in device failure. This part is listed for reference only and is suitable only for applications with maximum operating voltages at or below 55V.

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