FDB029N06 Equivalent & Substitute Parts

Part Overview

The FDB029N06 is an N-Channel 60V 120A MOSFET manufactured by onsemi in the PowerTrench® series, housed in a TO-263 (D2PAK) surface mount package. This device is rated for 231W power dissipation and operates across a temperature range of -55°C to 175°C. The part is currently in Last Time Buy status, indicating that onsemi has discontinued new production. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for applications requiring this performance class.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	60	V
Continuous Drain Current (Id) @ 25°C	120	A (Tc)
Rds On (Max) @ Id, Vgs	3.1	mOhm @ 75A, 10V
Gate Charge (Qg) @ Vgs	151	nC @ 10V
Power Dissipation (Max)	231	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-263 (D2PAK)	Surface Mount
Vgs (Max)	±20	V

Substitute Part Grouping Explanation

Substitution of the FDB029N06 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Drain to Source Voltage (Vdss): Must equal 60V
Continuous Drain Current (Id): Must equal or exceed 120A at Tc
Package Type: Must be TO-263 (D2PAK) surface mount
Gate Charge (Qg): Should remain within acceptable range for drive circuit compatibility
Operating Temperature Range: Must support -55°C to 175°C
RoHS and REACH Compliance: Must maintain ROHS3 Compliant and REACH Unaffected status

Secondary Compatibility Factors:

Rds On (Max): Lower values indicate improved performance; values between 2.0 and 4.0 mOhm are acceptable
Power Dissipation: Higher ratings provide design margin
Vgs(th) and Vgs (Max): Must remain within ±20V gate voltage specification

Substitutes are grouped into two categories: Manufacturer Recommended (direct replacement from onsemi) and Similar Alternatives (equivalent performance from other manufacturers including Infineon Technologies, Alpha & Omega Semiconductor, Nexperia USA, and Vishay Siliconix).

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ Tc (A)	Rds On (mOhm)	Qg (nC)	Pd Max (W)	Package	Status
FDB029N06	onsemi	60	120	3.1 @ 75A, 10V	151 @ 10V	231	TO-263 (D2PAK)	Last Time Buy
NTBGS2D5N06C	onsemi	60	169	2.5 @ 35A, 12V	45.4 @ 10V	136	TO-263 (D2PAK)	Last Time Buy
AOB266L	Alpha & Omega	60	140	3.2 @ 20A, 10V	80 @ 10V	268	TO-263 (D2PAK)	Active
IPB029N06N3GATMA1	Infineon	60	120	2.9 @ 100A, 10V	165 @ 10V	188	TO-263 (D2PAK)	Active
IPB034N06L3GATMA1	Infineon	60	90	3.4 @ 90A, 10V	79 @ 4.5V	167	TO-263 (D2PAK)	Not For New Designs
IPB037N06N3GATMA1	Infineon	60	90	3.7 @ 90A, 10V	98 @ 10V	188	TO-263 (D2PAK)	Active
IPB120N06S403ATMA2	Infineon	60	120	3.2 @ 100A, 10V	160 @ 10V	167	TO-263 (D2PAK)	Active
IPB90N06S404ATMA2	Infineon	60	90	4.0 @ 90A, 10V	128 @ 10V	150	TO-263 (D2PAK)	Obsolete
PSMN1R7-60BS,118	Nexperia	60	120	2.0 @ 25A, 10V	137 @ 10V	306	TO-263 (D2PAK)	Active
PSMN3R0-60BS,118	Nexperia	60	100	3.2 @ 25A, 10V	130 @ 10V	306	TO-263 (D2PAK)	Active
SQM120N06-3M5L_GE3	Vishay Siliconix	60	120	3.5 @ 29A, 10V	330 @ 10V	375	TO-263 (D2PAK)	Active

Engineering Selection Recommendations

Manufacturer Recommended Substitute:

The NTBGS2D5N06C from onsemi is the manufacturer-recommended substitute. Although it carries Last Time Buy status like the FDB029N06, it maintains identical voltage rating (60V), exceeds the current requirement (169A vs. 120A), and shares the same TO-263 (D2PAK) package. The lower Rds On value (2.5 mOhm) provides improved efficiency. This part is suitable for direct replacement in existing designs.

Primary Active Alternatives:

For new designs and long-term supply assurance, the following parts are recommended based on Active product status:

IPB029N06N3GATMA1 (Infineon OptiMOS™): Exact current rating match (120A), identical voltage (60V), superior Rds On (2.9 mOhm), and Active status. Suitable for direct substitution with no design modifications.
PSMN1R7-60BS,118 (Nexperia): Matches current rating (120A) and voltage (60V), offers the lowest Rds On (2.0 mOhm) for maximum efficiency, and provides the highest power dissipation rating (306W). Active status ensures long-term availability.
AOB266L (Alpha & Omega Semiconductor): Exceeds current requirement (140A), maintains 60V rating, and offers Active product status with high power dissipation (268W). Suitable for applications requiring additional current margin.
SQM120N06-3M5L_GE3 (Vishay Siliconix TrenchFET®): Matches current (120A) and voltage (60V) specifications, provides the highest power dissipation (375W), and carries AEC-Q101 automotive qualification. Active status with automotive-grade reliability.

Substitutes Not Recommended for New Designs:

IPB034N06L3GATMA1: Not For New Designs status; current rating reduced to 90A
IPB90N06S404ATMA2: Obsolete status; current rating reduced to 90A

Compliance Verification:

All recommended substitutes maintain ROHS3 Compliant and REACH Unaffected status, ensuring regulatory compliance. Automotive-qualified options (IPB120N06S403ATMA2, SQM120N06-3M5L_GE3) carry AEC-Q101 certification for applications requiring automotive-grade reliability.

Frequently Asked Questions (FAQ)

Q: Can the NTBGS2D5N06C directly replace the FDB029N06 without circuit modifications?

A: Yes. The NTBGS2D5N06C is the onsemi manufacturer-recommended substitute with identical voltage rating (60V), superior current capability (169A vs. 120A), and matching TO-263 (D2PAK) package. Gate charge and threshold voltage remain compatible with standard drive circuits. No design changes are required.

Q: Why do some substitutes have lower current ratings (90A) than the FDB029N06 (120A)?

A: Parts such as IPB037N06N3GATMA1 and IPB034N06L3GATMA1 have reduced continuous drain current ratings. These are not suitable as direct replacements for applications requiring the full 120A capability. They may be used only in designs where the actual operating current does not exceed their rated limits.

Q: What is the significance of Rds On variation among substitutes?

A: Rds On (on-state resistance) directly affects power dissipation and heat generation. Lower Rds On values (such as PSMN1R7-60BS,118 at 2.0 mOhm) result in reduced conduction losses and improved efficiency. Higher values (such as IPB90N06S404ATMA2 at 4.0 mOhm) increase power dissipation. Selection depends on thermal design requirements and efficiency targets.

Q: Are all substitutes compatible with the same gate drive voltage?

A: All substitutes maintain Vgs (Max) of ±20V, matching the FDB029N06 specification. However, gate charge (Qg) varies significantly. The FDB029N06 has 151 nC, while substitutes range from 45.4 nC (NTBGS2D5N06C) to 330 nC (SQM120N06-3M5L_GE3). Gate drive circuits must be verified to supply adequate charge within acceptable switching times. Lower Qg values reduce drive power requirements; higher values may require stronger drive circuits.

Q: Which substitute offers the best thermal performance?

A: The SQM120N06-3M5L_GE3 provides the highest power dissipation rating (375W), followed by PSMN1R7-60BS,118 (306W) and PSMN3R0-60BS,118 (306W). These parts offer superior thermal headroom for high-power applications. Selection should also consider Rds On values and actual operating conditions.

Q: Can I use IPB120N06S403ATMA2 in automotive applications?

A: Yes. The IPB120N06S403ATMA2 carries AEC-Q101 automotive qualification and is rated for automotive-grade reliability. It matches the FDB029N06 current rating (120A) and voltage (60V) with Active product status, making it suitable for automotive designs requiring qualified components.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Both are surface mount formats suitable for automated assembly. Tape & Reel (TR) is standard for high-volume production and automated pick-and-place equipment. Cut Tape (CT) is used for lower volumes or manual assembly. The electrical and mechanical specifications remain identical; packaging choice depends on manufacturing process and volume requirements.

Q: Why is the FDB029N06 in Last Time Buy status?

A: Last Time Buy status indicates that onsemi has discontinued new production of this part. Existing inventory remains available for a limited period. Customers should transition to active alternatives such as IPB029N06N3GATMA1, PSMN1R7-60BS,118, or AOB266L to ensure long-term supply continuity.

Q: Are there any differences in thermal characteristics between manufacturers?

A: Yes. Thermal performance varies based on die design, package construction, and thermal interface materials. The SQM120N06-3M5L_GE3 (Vishay) and PSMN1R7-60BS,118 (Nexperia) offer higher power dissipation ratings than the FDB029N06. Thermal modeling and junction temperature calculations should be performed for each candidate part based on actual application conditions.

Q: Can I substitute a 90A-rated part in a design specified for 120A?

A: No. Using a 90A-rated part (such as IPB037N06N3GATMA1) in a 120A application violates the device rating and creates risk of thermal runaway and failure. Substitutes must meet or exceed the original current specification. If current reduction is acceptable for the application, the lower-rated part may be used only after design review and thermal re-analysis.

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