IRFS3306PBF N-Channel 60V 120A MOSFET Equivalent & Substitute Parts

Part Overview

The IRFS3306PBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 60V drain-to-source voltage and 120A continuous drain current in a D2PAK surface mount package. This device is classified as discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing production and design requirements. The part operates across a temperature range of -55°C to 175°C and dissipates up to 230W at the case temperature (Tc). Substitute parts must maintain compatibility with the D2PAK package footprint and preserve electrical performance within the specified voltage and current ratings.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	60	V
Continuous Drain Current (Id) @ 25°C	120	A (Tc)
On-State Resistance (Rds On) @ 75A, 10V	4.2	mOhm
Gate Threshold Voltage (Vgs(th)) @ 150µA	4	V
Gate Charge (Qg) @ 10V	120	nC
Power Dissipation (Max)	230	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	D2PAK (TO-263-3)	Surface Mount
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the IRFS3306PBF is determined by the following critical parameters:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Minimum 60V (higher voltage ratings acceptable)
Continuous Drain Current (Id): Minimum 120A at Tc (lower current ratings not acceptable)
Package Type: D2PAK (TO-263-3) surface mount configuration
Operating Temperature Range: -55°C to 175°C minimum
RoHS3 Compliance and REACH Unaffected status

Secondary Compatibility Factors:

On-State Resistance (Rds On): Lower or equivalent values preferred for thermal performance
Gate Charge (Qg): Lower values reduce switching losses
Power Dissipation: Higher ratings provide thermal margin

Substitute parts are grouped into two categories:

Category A - Direct Equivalents (60V, 120A+): Parts maintaining the exact voltage and current specifications with D2PAK packaging.

Category B - Functional Alternatives (60V, 80-100A or 75V, 120A+): Parts with reduced current ratings at 60V or elevated voltage ratings at equivalent current, suitable for applications with design flexibility.

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ Tc (A)	Rds On @ 10V (mOhm)	Qg @ 10V (nC)	Pd Max (W)	Package	Status
IRFS3306PBF	Infineon	60	120	4.2 @ 75A	120	230	D2PAK	Discontinued
PSMN1R7-60BS,118	Nexperia	60	120	2.0 @ 25A	137	306	D2PAK	Active
STB160N75F3	STMicroelectronics	75	120	4.0 @ 60A	85	330	D2PAK	Active
IXTA230N075T2-7	IXYS	75	230	4.2 @ 50A	178	480	TO-263-7	Active
IPB037N06N3GATMA1	Infineon	60	90	3.7 @ 90A	98	188	D2PAK	Active
FDB050AN06A0	onsemi	60	80	5.0 @ 80A	80	245	D2PAK	Active
STB100N6F7	STMicroelectronics	60	100	5.6 @ 50A	30	125	D2PAK	Active
STB130N6F7	STMicroelectronics	60	80	5.0 @ 40A	42	160	D2PAK	Active
N0601N-ZK-E1-AY	Renesas	60	100	4.2 @ 50A	133	156	D2PAK	Active
IPB034N06L3GATMA1	Infineon	60	90	3.4 @ 90A	79	167	D2PAK	Not For New Designs

Engineering Selection Recommendations

Primary Recommendation - Direct Equivalent:

PSMN1R7-60BS,118 (Nexperia) is the preferred direct substitute. It maintains 60V/120A specifications with D2PAK packaging, active product status, and ROHS3 compliance. The lower on-state resistance (2.0 mOhm @ 25A) provides improved thermal efficiency compared to the original part. Inventory availability is confirmed at 1900 pieces.

Secondary Recommendation - Elevated Voltage Alternative:

STB160N75F3 (STMicroelectronics) provides equivalent 120A current capacity with 75V rating, enabling use in applications with higher voltage headroom. The 75V rating ensures compatibility with 60V designs while providing overvoltage margin. Active product status and 2008 pieces in stock support production continuity.

Alternative for Current-Reduced Applications:

IPB037N06N3GATMA1 (Infineon OptiMOS™ series) operates at 60V/90A with active status and 14999 pieces available. This part is suitable for applications where 90A continuous current satisfies design requirements, offering lower gate charge (98 nC) for reduced switching losses.

Compliance Verification:

All recommended substitutes maintain ROHS3 compliance, REACH Unaffected status, and -55°C to 175°C operating temperature range. Package compatibility with D2PAK (TO-263-3) footprint is confirmed for all primary recommendations.

Frequently Asked Questions (FAQ)

Q1: Can PSMN1R7-60BS,118 directly replace IRFS3306PBF without PCB modifications?

A: Yes. Both parts use identical D2PAK (TO-263-3) packaging with the same pin configuration and footprint. No PCB layout changes are required. Electrical performance is maintained within design specifications.

Q2: What is the difference between 60V and 75V rated MOSFETs in this comparison?

A: The 75V rating (STB160N75F3, IXTA230N075T2-7) provides higher drain-to-source voltage capability. These parts operate safely in 60V applications while offering protection against transient overvoltages. Selection depends on circuit design margins and maximum voltage exposure.

Q3: Why do some substitute parts show lower continuous current ratings (80A, 90A, 100A)?

A: Lower current ratings indicate reduced continuous drain current capacity at case temperature (Tc). These parts are suitable only for applications where peak current requirements do not exceed their specified ratings. Direct 120A equivalents (PSMN1R7-60BS,118, STB160N75F3) are required for designs demanding full 120A capacity.

Q4: How does on-state resistance (Rds On) affect thermal performance?

A: Lower Rds On values reduce conduction losses and heat generation. PSMN1R7-60BS,118 exhibits 2.0 mOhm (measured at 25A, 10V), superior to the original 4.2 mOhm specification. This improvement reduces thermal stress and extends device lifetime in high-current applications.

Q5: Are there package alternatives to D2PAK?

A: IXTA230N075T2-7 uses TO-263-7 (6 leads + tab) packaging, which differs from the standard D2PAK (2 leads + tab). This package variant requires PCB footprint redesign and is not recommended for direct substitution without layout verification.

Q6: What does "Not For New Designs" status mean for IPB034N06L3GATMA1?

A: This designation indicates the manufacturer no longer recommends this part for new circuit designs, though existing inventory may be available. For new production, select parts with "Active" status such as IPB037N06N3GATMA1 or PSMN1R7-60BS,118.

Q7: How do gate charge specifications impact circuit design?

A: Gate charge (Qg) determines the energy required to switch the MOSFET on and off. Lower values (PSMN1R7-60BS,118 at 137 nC) reduce driver power consumption and switching losses compared to higher values. Selection depends on gate driver capability and switching frequency requirements.

Q8: Is thermal derating necessary when substituting with lower power dissipation ratings?

A: Parts with lower maximum power dissipation (Pd) ratings require more conservative thermal design. STB100N6F7 (125W) and N0601N-ZK-E1-AY (156W) demand careful thermal management compared to PSMN1R7-60BS,118 (306W). Verify junction temperature calculations for your specific application.

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