FDMS8848NZ N-Channel 40V MOSFET Equivalent & Substitute Parts

Part Overview

The FDMS8848NZ is an N-Channel 40V MOSFET manufactured by onsemi in the PowerTrench® series, housed in an 8-PQFN (5x6) surface mount package. This device is rated for 22.8A continuous drain current at 25°C (Ta) and 49A at case temperature (Tc), with a maximum on-resistance of 3.1mOhm at 10V gate drive. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain compatibility across drain-source voltage, continuous drain current, package type, and thermal characteristics while meeting current product status and compliance requirements.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	40	V
Continuous Drain Current @ 25°C (Ta)	22.8	A
Continuous Drain Current @ Case Temp (Tc)	49	A
Rds On (Max) @ 10V Vgs	3.1	mOhm
Gate Charge (Qg) @ 10V	152	nC
Input Capacitance (Ciss) @ 20V	8075	pF
Power Dissipation (Ta)	2.5	W
Power Dissipation (Tc)	104	W
Operating Temperature Range	-55 to 150	°C
Package Type	8-PQFN (5x6)	Surface Mount
FET Type	N-Channel	—
Technology	MOSFET (Metal Oxide)	—

Substitute Part Grouping Explanation

Substitution of the FDMS8848NZ is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Drain to Source Voltage (Vdss): Must equal or exceed 40V
Continuous Drain Current (Ta): Must meet or exceed 22.8A at 25°C
Continuous Drain Current (Tc): Must meet or exceed 49A at case temperature
On-Resistance (Rds On): Lower values indicate improved performance; values at or below 3.1mOhm at 10V gate drive are preferred
Package Type: 8-PQFN or equivalent 8-pin surface mount packages (8-PowerTDFN, PG-TDSON-8-1, PG-TDSON-8-5, PowerDI5060-8)
Operating Temperature Range: Must support -55°C to 150°C minimum
Product Status: Active parts are preferred for new designs; obsolete parts are suitable only for legacy system maintenance

Secondary Compatibility Parameters:

Gate Charge (Qg): Lower values reduce switching losses
Input Capacitance (Ciss): Lower values improve switching speed
Vgs(th) threshold voltage: Must be compatible with existing gate drive circuits
Maximum Gate Voltage (Vgs): Must support ±20V or greater

Substitute parts are grouped into two categories: direct onsemi PowerTrench® series alternatives and cross-manufacturer equivalents from Infineon Technologies and Diodes Incorporated that meet all primary electrical and package requirements.

Parameter Comparison

Parameter	FDMS8848NZ	FDMS8460	DMTH4005SPS-13	BSC018N04LSGATMA1	BSC019N04NSGATMA1	BSC027N04LSGATMA1	BSC030N04NSGATMA1	BSC035N04LSGATMA1	BSC050N04LSGATMA1	BSC054N04NSGATMA1	BSC059N04LSGATMA1
Manufacturer	onsemi	onsemi	Diodes Inc.	Infineon	Infineon	Infineon	Infineon	Infineon	Infineon	Infineon	Infineon
Vdss (V)	40	40	40	40	40	40	40	40	40	40	40
Id @ 25°C Ta (A)	22.8	25	20.9	30	30	24	23	21	18	17	16
Id @ Tc (A)	49	49	100	100	100	100	100	100	85	81	73
Rds On @ 10V (mOhm)	3.1	2.2	3.7	1.8	1.9	2.7	3.0	3.5	5.0	5.4	5.9
Qg @ 10V (nC)	152	110	49.1	150	108	85	61	64	47	34	40
Ciss @ 20V (pF)	8075	7205	3062	12000	8800	6800	4900	5100	3700	2800	3200
Power Dissipation Ta (W)	2.5	2.5	2.6	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5
Power Dissipation Tc (W)	104	104	150	125	125	83	83	69	57	57	50
Operating Temp Range (°C)	-55 to 150	-55 to 150	-55 to 175	-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)	8-PQFN (5x6)	PowerDI5060-8	PG-TDSON-8-1	PG-TDSON-8-1	PG-TDSON-8-1	PG-TDSON-8-1	PG-TDSON-8-1	PG-TDSON-8-5	PG-TDSON-8-5	PG-TDSON-8-5
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1: Direct onsemi PowerTrench® Replacement

FDMS8460 is the primary substitute for FDMS8848NZ. Both devices are manufactured by onsemi in the PowerTrench® series with identical 40V Vdss rating, matching 49A Tc current rating, and identical 8-PQFN (5x6) package. FDMS8460 provides improved on-resistance (2.2mOhm versus 3.1mOhm at 10V), reduced gate charge (110nC versus 152nC), and active product status. This part is suitable for direct pin-for-pin replacement in existing designs. ROHS3 compliance and identical thermal specifications (2.5W Ta, 104W Tc) ensure compatibility with legacy systems requiring FDMS8848NZ.

Tier 2: Infineon OptiMOS™ Cross-Manufacturer Equivalents

Infineon Technologies BSC018N04LSGATMA1, BSC019N04NSGATMA1, BSC027N04LSGATMA1, and BSC030N04NSGATMA1 meet or exceed all primary electrical requirements with 40V Vdss and continuous drain currents ranging from 23A to 30A at 25°C. These parts feature superior on-resistance characteristics (1.8mOhm to 3.0mOhm at 10V) and reduced gate charge (61nC to 150nC), resulting in lower switching losses and improved thermal performance. All are housed in PG-TDSON-8-1 packages, which are mechanically and electrically compatible with 8-PQFN footprints. All Infineon parts carry ROHS3 compliance and active product status. BSC030N04NSGATMA1 offers the highest inventory availability (45,991 units) among Infineon options.

Tier 3: Diodes Incorporated Alternative

DMTH4005SPS-13 from Diodes Incorporated provides a 40V N-Channel MOSFET with 20.9A continuous drain current at 25°C and exceptional 100A Tc rating. The PowerDI5060-8 package offers superior thermal performance (150W Tc versus 104W for FDMS8848NZ) and extended operating temperature range (-55°C to 175°C). On-resistance of 3.7mOhm at 10V and significantly reduced gate charge (49.1nC) support high-frequency switching applications. This part is suitable for designs requiring enhanced thermal dissipation or extended temperature operation. ROHS3 compliance and active status confirm suitability for new production.

Tier 4: Lower Current Infineon Alternatives

BSC035N04LSGATMA1, BSC050N04LSGATMA1, BSC054N04NSGATMA1, and BSC059N04LSGATMA1 provide 40V Vdss with continuous drain currents ranging from 16A to 21A at 25°C. These parts are suitable for applications where the full 22.8A continuous current of FDMS8848NZ is not required. All feature reduced on-resistance and gate charge compared to the main part, supporting improved efficiency in lower-current designs. All carry ROHS3 compliance and active product status.

Compliance and Certification Summary

All recommended substitute parts carry ROHS3 compliance and REACH Unaffected status, matching the regulatory requirements of FDMS8848NZ. All substitute parts are classified as active products, ensuring long-term availability and supply chain stability. The FDMS8460 is the preferred direct replacement due to identical series designation, package type, and thermal ratings. Cross-manufacturer alternatives from Infineon and Diodes Incorporated are suitable for new designs where supply constraints or performance optimization justify qualification of alternative manufacturers.

Frequently Asked Questions (FAQ)

Q: Can FDMS8460 be used as a direct replacement for FDMS8848NZ in existing PCB designs?

A: Yes. FDMS8460 is a pin-for-pin compatible substitute with identical 8-PQFN (5x6) package, 40V Vdss rating, and 49A Tc current rating. The improved on-resistance (2.2mOhm versus 3.1mOhm) and reduced gate charge (110nC versus 152nC) provide performance benefits without requiring circuit modifications. Both parts are onsemi PowerTrench® devices with matching thermal specifications.

Q: What is the primary advantage of Infineon BSC018N04LSGATMA1 over FDMS8848NZ?

A: BSC018N04LSGATMA1 offers superior on-resistance (1.8mOhm at 10V versus 3.1mOhm), reduced gate charge (150nC versus 152nC), and higher continuous drain current at case temperature (100A versus 49A). The PG-TDSON-8-1 package is mechanically compatible with 8-PQFN footprints. These characteristics reduce conduction losses and switching losses, improving overall circuit efficiency.

Q: Are Infineon OptiMOS™ parts mechanically compatible with FDMS8848NZ PCB layouts?

A: Infineon OptiMOS™ parts in PG-TDSON-8-1 and PG-TDSON-8-5 packages are mechanically and electrically compatible with 8-PQFN (5x6) footprints. Both package types are classified as 8-PowerTDFN variants with identical pin configurations and thermal pad layouts. PCB layout modifications are not required for substitution.

Q: Which substitute part offers the best thermal performance?

A: DMTH4005SPS-13 from Diodes Incorporated provides the highest thermal performance with 150W power dissipation at case temperature (Tc) compared to 104W for FDMS8848NZ. The PowerDI5060-8 package features enhanced thermal characteristics suitable for high-power applications. This part also supports extended operating temperature range (-55°C to 175°C).

Q: Is FDMS8460 suitable for new product designs, or should I use a cross-manufacturer alternative?

A: FDMS8460 is suitable for new product designs. It carries active product status, ROHS3 compliance, and is manufactured by onsemi in the same PowerTrench® series as the obsolete FDMS8848NZ. The part offers improved electrical characteristics and long-term supply availability. Cross-manufacturer alternatives are appropriate when supply constraints exist or when specific performance characteristics (such as lower on-resistance or extended temperature range) are required.

Q: What is the impact of lower gate charge on circuit performance?

A: Lower gate charge (Qg) reduces the energy required to switch the MOSFET on and off, resulting in lower switching losses and reduced heat generation. FDMS8460 (110nC) and Infineon alternatives (34nC to 150nC) exhibit lower gate charge than FDMS8848NZ (152nC), enabling higher switching frequencies or reduced gate drive power requirements. This is particularly beneficial in high-frequency switching applications such as DC-DC converters and motor control circuits.

Q: Can I use BSC054N04NSGATMA1 as a substitute if my application requires only 17A continuous current?

A: Yes. BSC054N04NSGATMA1 meets the 40V Vdss requirement and provides 17A continuous drain current at 25°C, which is below the 22.8A rating of FDMS8848NZ. This part is suitable only for applications where the actual circuit current demand does not exceed 17A. For applications requiring the full 22.8A continuous current, higher-rated alternatives such as FDMS8460, BSC018N04LSGATMA1, or BSC019N04NSGATMA1 must be selected.

Q: What is the difference between PG-TDSON-8-1 and PG-TDSON-8-5 packages?

A: Both PG-TDSON-8-1 and PG-TDSON-8-5 are 8-pin surface mount packages compatible with 8-PQFN footprints. The primary difference is thermal performance: PG-TDSON-8-1 parts (BSC018N04LSGATMA1, BSC019N04NSGATMA1, BSC027N04LSGATMA1, BSC030N04NSGATMA1) support higher power dissipation at case temperature (83W to 125W), while PG-TDSON-8-5 parts (BSC050N04LSGATMA1, BSC054N04NSGATMA1, BSC059N04LSGATMA1) support lower power dissipation (50W to 57W). Package selection depends on thermal requirements of the specific application.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts carry ROHS3 compliance certification. FDMS8848NZ does not specify RoHS status, but all active alternatives (FDMS8460, DMTH4005SPS-13, and all Infineon OptiMOS™ parts) are ROHS3 compliant, ensuring compatibility with environmental regulations and customer requirements.

Q: What is the inventory status of substitute parts?

A: FDMS8460 has 15,165 units in stock. Infineon alternatives range from 1,000 to 1,000,400 units, with BSC054N04NSGATMA1 offering the highest availability (1,000,400 units). DMTH4005SPS-13 has 3,481 units available. All parts are classified as new original stock, ensuring quality and authenticity.

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