AUIRFS3206 N-Channel 60V 120A MOSFET Equivalent & Substitute Parts

Part Overview

The AUIRFS3206 is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 60V drain-to-source voltage with 120A continuous drain current in a D2PAK surface mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and design continuity. The HEXFET® series component operates across a wide temperature range from -55°C to 175°C and is suitable for high-current switching applications requiring efficient power dissipation up to 300W.

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	3	mOhm
Gate Threshold Voltage (Vgs(th)) @ 150µA	4	V
Gate Charge (Qg) @ 10V	170	nC
Power Dissipation (Max)	300	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 AUIRFS3206 is determined by the following critical parameters:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Must be ≥60V
Continuous Drain Current (Id): Must be ≥120A at 25°C
Package Type: D2PAK (TO-263-3) or compatible surface mount variants
On-State Resistance (Rds On): Lower or equivalent values preferred for thermal performance
Operating Temperature Range: Must support -55°C to 175°C
RoHS Compliance: ROHS3 Compliant status required

Substitute Categories:

Category 1 – Direct Equivalents (120A @ 60V, Active Status) Parts meeting or exceeding all primary specifications with active product status:

IPB029N06N3GATMA1 (Infineon OptiMOS™, 120A, 60V, Active)
FDB029N06 (Fairchild PowerTrench®, 120A, 60V, Active)

Category 2 – Reduced Current Alternatives (90A @ 60V, Active Status) Parts with lower continuous current but maintained voltage rating and active status:

IPB037N06N3GATMA1 (Infineon OptiMOS™, 90A, 60V, Active)
IPB034N06L3GATMA1 (Infineon OptiMOS™, 90A, 60V, Not For New Designs)
IPB90N06S404ATMA2 (Infineon OptiMOS™, 90A, 60V, Obsolete, AEC-Q101 Automotive)

Category 3 – Higher Current Alternatives (100A–140A @ 55V–60V) Parts with comparable or higher current ratings at slightly reduced or equivalent voltage:

AOB266L (Alpha & Omega, 140A @ 55V, 60V rated, Active)
NP100N055PUK-E1-AY (Renesas, 100A @ 55V, Active)
IXTA260N055T2 (IXYS TrenchT2™, 260A @ 55V, Active)
IXTA260N055T2-7 (IXYS TrenchT2™, 260A @ 55V, Active, TO-263-7 variant)

Category 4 – Lower Current Alternatives (80A @ 60V) Parts with reduced current capacity but maintained voltage and package compatibility:

FDB035AN06A0 (Fairchild PowerTrench®, 80A @ 60V, Active)

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On (mOhm)	Qg (nC)	Pd Max (W)	Package	Status
AUIRFS3206	Infineon	60	120	3.0 @ 75A	170 @ 10V	300	D2PAK	Obsolete
IPB029N06N3GATMA1	Infineon	60	120	2.9 @ 100A	165 @ 10V	188	D2PAK	Active
IPB037N06N3GATMA1	Infineon	60	90	3.7 @ 90A	98 @ 10V	188	D2PAK	Active
IPB034N06L3GATMA1	Infineon	60	90	3.4 @ 90A	79 @ 4.5V	167	D2PAK	Not For New Designs
IPB90N06S404ATMA2	Infineon	60	90	4.0 @ 90A	128 @ 10V	150	D2PAK	Obsolete
AOB266L	Alpha & Omega	60	140	3.2 @ 20A	80 @ 10V	268	D2PAK	Active
FDB029N06	Fairchild	60	120	3.1 @ 75A	151 @ 10V	231	D2PAK	Active
FDB035AN06A0	Fairchild	60	80	3.5 @ 80A	124 @ 10V	310	D2PAK	Active
IXTA260N055T2	IXYS	55	260	3.3 @ 50A	140 @ 10V	480	D2PAK	Active
IXTA260N055T2-7	IXYS	55	260	3.3 @ 50A	140 @ 10V	480	TO-263-7	Active
NP100N055PUK-E1-AY	Renesas	55	100	3.25 @ 50A	120 @ 10V	176	D2PAK	Active

Engineering Selection Recommendations

For Direct Replacement (120A @ 60V Requirement):

IPB029N06N3GATMA1 is the primary recommended substitute. This Infineon OptiMOS™ device maintains the 120A continuous drain current and 60V voltage rating with active product status. The part exhibits lower on-state resistance (2.9 mOhm vs. 3.0 mOhm) and reduced gate charge (165 nC vs. 170 nC), providing improved switching efficiency. ROHS3 compliance and unlimited moisture sensitivity level (MSL 1) ensure manufacturing compatibility. Inventory availability of 17,001 pieces supports production continuity.

FDB029N06 (Fairchild PowerTrench®) provides an alternative direct equivalent with 120A @ 60V capability and active status. On-state resistance of 3.1 mOhm and gate charge of 151 nC are comparable to the original specification. This part is available in bulk packaging with 15,226 pieces in stock.

For Current-Reduced Applications (90A @ 60V):

IPB037N06N3GATMA1 is recommended for designs tolerating 90A continuous current. This active-status OptiMOS™ device maintains 60V rating with reduced gate charge (98 nC) and improved thermal characteristics. Tape & Reel packaging with 14,999 pieces in inventory supports high-volume production.

IPB034N06L3GATMA1 offers similar 90A @ 60V performance but carries "Not For New Designs" status, limiting its use to legacy system support only.

For Higher Current Capability (>120A):

AOB266L (Alpha & Omega) provides 140A continuous current at 60V with active status. The lower gate charge (80 nC) and comparable on-state resistance (3.2 mOhm) support high-frequency switching applications. This part is suitable when current headroom exceeds the original 120A specification.

IXTA260N055T2 and IXTA260N055T2-7 (IXYS TrenchT2™) deliver 260A continuous current at 55V, providing significant current margin. The TO-263-7 variant (IXTA260N055T2-7) includes additional leads for enhanced thermal management. Both maintain active status with 480W power dissipation capability. Note: Vdss is 55V, requiring circuit voltage verification.

For Automotive Applications:

IPB90N06S404ATMA2 is the only AEC-Q101 qualified option, suitable for automotive-grade designs despite obsolete status. This part maintains 90A @ 60V with automotive qualification.

Compliance and Certification:

All recommended substitutes maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). REACH unaffected status is consistent across all alternatives. ECCN classification remains EAR99 for all parts, ensuring export compliance equivalence.

Frequently Asked Questions (FAQ)

Q1: Can IPB029N06N3GATMA1 directly replace AUIRFS3206 in existing designs?

Yes. IPB029N06N3GATMA1 maintains identical voltage (60V) and current (120A) ratings with the same D2PAK package. Lower on-state resistance (2.9 mOhm vs. 3.0 mOhm) and reduced gate charge (165 nC vs. 170 nC) provide improved performance. No circuit modifications are required. Both parts are ROHS3 compliant with MSL 1 rating.

Q2: What is the difference between IXTA260N055T2 and IXTA260N055T2-7?

Both parts are electrically identical with 260A @ 55V specifications. The primary difference is packaging: IXTA260N055T2 uses standard TO-263AA (D2PAK), while IXTA260N055T2-7 uses TO-263-7 with six leads plus tab for enhanced thermal dissipation. The TO-263-7 variant provides superior heat spreading in high-power applications. Verify PCB layout compatibility before selecting the six-lead variant.

Q3: Why do some substitutes have 55V rating instead of 60V?

Parts rated 55V (IXTA260N055T2, IXTA260N055T2-7, NP100N055PUK-E1-AY) are suitable for circuits operating at or below 55V. If your design operates at 60V, these parts are not recommended. Verify maximum circuit voltage before selecting 55V-rated alternatives. For 60V operation, select parts with Vdss ≥60V.

Q4: Is IPB034N06L3GATMA1 suitable for new production designs?

No. IPB034N06L3GATMA1 carries "Not For New Designs" status, restricting its use to legacy system support and repair applications only. For new production, select IPB037N06N3GATMA1 (active status) or IPB029N06N3GATMA1 (120A option).

Q5: What does "Tc" mean in the current rating specification?

"Tc" denotes case temperature measurement point. Current ratings specified as "120A (Tc)" indicate the continuous drain current at a defined case temperature (typically 25°C or 100°C depending on datasheet convention). This differs from "Ta" (ambient temperature), which is measured at the device's ambient environment. Tc ratings are more conservative for thermal design calculations.

Q6: Can I use AOB266L if my circuit only requires 120A?

Yes. AOB266L is rated for 140A continuous current, providing 20A headroom above the 120A requirement. The 60V voltage rating matches the original specification. Lower gate charge (80 nC) improves switching speed. This part is suitable for designs requiring current margin or improved efficiency. Verify thermal design accommodates the 268W power dissipation capability.

Q7: What is the significance of "OptiMOS™" and "PowerTrench®" series designations?

These are proprietary technology platforms. OptiMOS™ (Infineon) and PowerTrench® (Fairchild) represent different MOSFET manufacturing processes optimized for specific performance characteristics. Both series are suitable for the AUIRFS3206 application. Selection between them depends on availability, cost, and specific thermal or switching requirements. Electrical compatibility is maintained across series for equivalent voltage and current ratings.

Q8: Are all substitute parts available in the same packaging options?

No. Most substitutes are available in Tape & Reel (TR) or Cut Tape (CT) packaging. FDB029N06 is available in bulk packaging. IXTA260N055T2 is supplied in tubes. Verify packaging compatibility with your assembly process before finalizing part selection. Contact suppliers for specific packaging availability.

Q9: Does lower on-state resistance always indicate a better substitute?

Lower on-state resistance reduces conduction losses and heat generation, improving efficiency. However, lower Rds On may correlate with higher gate charge or different switching characteristics. Evaluate the complete parameter set—Rds On, Qg, and power dissipation—against your circuit requirements. IPB029N06N3GATMA1 demonstrates superior efficiency with both lower Rds On (2.9 mOhm) and lower Qg (165 nC) compared to the original.

Q10: Is IPB90N06S404ATMA2 suitable for non-automotive applications?

Yes. IPB90N06S404ATMA2 is AEC-Q101 qualified, meaning it exceeds automotive reliability standards and is suitable for any application requiring high reliability. However, this part is obsolete, limiting long-term availability. For new designs, select active-status alternatives such as IPB037N06N3GATMA1 (90A) or IPB029N06N3GATMA1 (120A).

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