FDMS3008SDC N-Channel 30V 29A Dual Cool MOSFET Equivalent & Substitute Parts

Part Overview

The FDMS3008SDC is an N-Channel 30V 29A surface mount MOSFET manufactured by onsemi, featuring Dual Cool™, PowerTrench®, and SyncFET™ technology in an 8-PQFN (5x6) package. This device is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. The part operates across a temperature range of -55°C to 150°C (TJ) with a maximum power dissipation of 3.3W (Ta) and 78W (Tc).

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	29	A (Ta)
RDS(on) Max @ Id, Vgs	2.6	mOhm @ 28A, 10V
Gate Threshold Voltage (Vgs(th)) Max @ Id	3	V @ 1mA
Gate Charge (Qg) Max @ Vgs	64	nC @ 10V
Input Capacitance (Ciss) Max @ Vds	4520	pF @ 15V
Maximum Gate Voltage (Vgs)	±20	V
Power Dissipation Max	3.3 (Ta), 78 (Tc)	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package Type	8-PQFN (5x6)	Surface Mount
Moisture Sensitivity Level	1	Unlimited

Substitute Part Grouping Explanation

Substitution of the FDMS3008SDC is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

Drain to Source Voltage (Vdss): 30V (exact match required)
Continuous Drain Current (Id) @ 25°C: minimum 29A at Ta
RDS(on) Max @ 10V gate drive: ≤2.6 mOhm (or lower)
Gate Threshold Voltage (Vgs(th)): ≤3V @ 1mA
Operating Temperature Range: -55°C to 150°C (TJ) minimum
Package Type: 8-PowerTDFN surface mount configuration
Moisture Sensitivity Level: MSL 1 (Unlimited)

Secondary Compatibility Parameters:

Gate Charge (Qg): ≤64 nC @ 10V (lower values acceptable)
Input Capacitance (Ciss): ≤4520 pF @ 15V (lower values acceptable)
Maximum Gate Voltage (Vgs): ±20V minimum

Substitute parts are grouped into two categories: Direct Equivalents (matching all primary criteria with active product status) and Functional Alternatives (meeting electrical requirements with potential package or feature variations).

Parameter Comparison

Parameter	FDMS3008SDC	FDMC7660DC	RS1E280GNTB	BSC020N03LSGATMA1	BSC025N03LSGATMA1	BSC0501NSIATMA1	BSC0901NSATMA1	BSC0902NSATMA1
Vdss (V)	30	30	30	30	30	30	30	30
Id @ 25°C Ta (A)	29	30	28	28	25	29	28	24
RDS(on) Max @ 10V (mOhm)	2.6	2.2	2.6	2.0	2.5	1.9	1.9	2.6
Vgs(th) Max @ Id (V)	3.0 @ 1mA	2.5 @ 250µA	2.5 @ 1mA	2.2 @ 250µA	2.2 @ 250µA	2.0 @ 250µA	2.2 @ 250µA	2.2 @ 250µA
Qg Max @ 10V (nC)	64	76	36	93	74	33	44	26
Ciss Max @ 15V (pF)	4520	5170	2300	7200	6100	2200	2800	1700
Vgs Max (V)	±20	±20	±20	±20	±20	±20	±20	±20
Power Dissipation Ta (W)	3.3	3.0	3.0	2.5	2.5	2.5	2.5	2.5
Power Dissipation Tc (W)	78	78	31	96	83	50	69	48
Operating Temp Range (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150
Package	8-PQFN (5x6)	Dual Cool 33	8-HSOP	PG-TDSON-8-1	PG-TDSON-8-5	PG-TDSON-8-6	PG-TDSON-8-5	PG-TDSON-8-6
Product Status	Obsolete	Active	Active	Active	Not For New Designs	Active	Active	Active
RoHS Status	Not Specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Tier 1 - Direct Substitutes (Recommended for New Designs):

FDMC7660DC (onsemi) is the primary recommended substitute. This active component maintains the same 30V Vdss rating with 30A continuous drain current at Ta, exceeding the FDMS3008SDC specification of 29A. The RDS(on) of 2.2 mOhm @ 22A, 10V is superior to the original 2.6 mOhm specification. Operating temperature range matches (-55°C to 150°C). ROHS3 compliance and MSL 1 rating are confirmed. The Dual Cool™ 33 package is a direct onsemi platform evolution. Inventory availability is 7,841 units.

BSC0501NSIATMA1 (Infineon Technologies) provides exact current matching at 29A Ta with superior RDS(on) of 1.9 mOhm @ 30A, 10V. This OptiMOS™ series device meets all primary electrical criteria with active product status and ROHS3 compliance. The PG-TDSON-8-6 package is a standard 8-PowerTDFN surface mount configuration. Inventory: 1,900 units.

Tier 2 - Functional Alternatives (Active Status, Acceptable Substitution):

BSC0901NSATMA1 (Infineon Technologies) delivers 28A continuous drain current with 1.9 mOhm RDS(on) @ 30A, 10V. This device is active, ROHS3 compliant, and operates across the required temperature range. The PG-TDSON-8-5 package is a standard 8-PowerTDFN configuration. Inventory: 110,100 units (highest availability).

BSC0901NSIATMA1 (Infineon Technologies) matches 28A Ta specification with 2.0 mOhm RDS(on) @ 30A, 10V. Active product status, ROHS3 compliance, and full temperature range support are confirmed. PG-TDSON-8-6 package. Inventory: 3,100 units.

RS1E280GNTB (Rohm Semiconductor) provides 28A Ta with matching 2.6 mOhm RDS(on) @ 28A, 10V. Active product status and ROHS3 compliance are confirmed. The 8-HSOP package represents a different surface mount configuration requiring PCB layout evaluation. Inventory: 1,995 units.

Tier 3 - Limited Substitution (Product Status Constraints):

BSC025N03LSGATMA1 (Infineon Technologies) is marked "Not For New Designs" despite meeting electrical criteria (25A Ta, 2.5 mOhm RDS(on), active temperature range). This part is suitable only for legacy system maintenance or replacement applications where design freeze is established. Inventory: 40,066 units.

Not Recommended:

BSC025N03MSGATMA1 presents reduced continuous drain current at 23A Ta, below the 29A requirement of the FDMS3008SDC.

BSC020N03LSGATMA1 and BSZ019N03LSATMA1 fall below the 29A continuous current specification at Ta.

BSC0902NSATMA1 provides only 24A Ta, insufficient for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can FDMC7660DC directly replace FDMS3008SDC in existing PCB layouts?

A: FDMC7660DC uses the Dual Cool™ 33 package, which differs from the FDMS3008SDC 8-PQFN (5x6) package. Physical footprint, pin configuration, and thermal characteristics require PCB layout verification. Electrical performance is compatible.

Q: What is the primary difference between Infineon OptiMOS™ variants (BSC0501NSIATMA1, BSC0901NSATMA1, BSC0901NSIATMA1)?

A: These devices share the 30V Vdss rating and similar RDS(on) characteristics but differ in gate charge (Qg), input capacitance (Ciss), and package variants (TDSON-8-1, TDSON-8-5, TDSON-8-6). BSC0501NSIATMA1 matches the FDMS3008SDC current specification exactly at 29A Ta. BSC0901 variants provide 28A Ta with lower gate charge, reducing switching losses in high-frequency applications.

Q: Why is BSC025N03LSGATMA1 marked "Not For New Designs" despite meeting electrical requirements?

A: Infineon has designated this part for legacy support only. New designs must select from active product status alternatives such as BSC0501NSIATMA1 or BSC0901NSATMA1 to ensure long-term supply chain stability and manufacturer support.

Q: How do package differences affect substitution feasibility?

A: The FDMS3008SDC uses 8-PQFN (5x6), while substitute parts employ PG-TDSON-8 variants or 8-HSOP packages. These represent different surface mount footprints with distinct pin layouts, thermal vias, and solder pad geometries. PCB redesign is required for package changes. Electrical performance remains compatible when Vdss, Id, RDS(on), and temperature range specifications align.

Q: What is the significance of RDS(on) differences between substitutes?

A: Lower RDS(on) values reduce conduction losses and heat dissipation. FDMS3008SDC specifies 2.6 mOhm @ 28A, 10V. Substitutes with 1.9–2.0 mOhm (BSC0501NSIATMA1, BSC0901NSATMA1, BSC0901NSIATMA1) provide improved efficiency. This is beneficial in power conversion applications but requires thermal management verification to prevent over-cooling or component stress.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended active substitutes (FDMC7660DC, RS1E280GNTB, BSC0501NSIATMA1, BSC0901NSATMA1, BSC0901NSIATMA1, BSC0902NSATMA1) are ROHS3 compliant. The original FDMS3008SDC does not specify RoHS status due to its obsolete classification. Compliance verification is required for legacy system upgrades.

Q: What is the impact of gate charge (Qg) variations on circuit design?

A: Gate charge affects switching speed and driver power requirements. FDMS3008SDC specifies 64 nC @ 10V. Substitutes range from 20–98 nC. Lower Qg values (BSC0901NSIATMA1 at 20 nC, BSC0501NSIATMA1 at 33 nC) reduce gate drive power and enable faster switching. Higher Qg values (BSC020N03LSGATMA1 at 93 nC) require stronger gate drivers but may improve noise immunity in certain topologies.

Q: Can RS1E280GNTB (Rohm) substitute for onsemi FDMS3008SDC in the same application?

A: RS1E280GNTB meets the electrical specifications (30V, 28A Ta, 2.6 mOhm RDS(on)) and operating temperature range. However, the 8-HSOP package differs from the 8-PQFN footprint, requiring PCB layout changes. Cross-manufacturer substitution is electrically feasible but demands design validation and thermal analysis due to different package thermal characteristics (31W Tc vs. 78W Tc).

Q: What inventory considerations apply to substitute selection?

A: BSC0901NSATMA1 offers the highest inventory availability at 110,100 units, providing supply chain security. FDMC7660DC (7,841 units) and BSC025N03LSGATMA1 (40,066 units) provide substantial stock. Lower-inventory alternatives (RS1E280GNTB at 1,995 units, BSC0501NSIATMA1 at 1,900 units) may require longer lead times for volume production.

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