IRL3803VPBF N-Channel 30V 140A MOSFET Equivalent & Substitute Parts

Part Overview

The IRL3803VPBF is an N-Channel MOSFET manufactured by Infineon Technologies in the HEXFET® series, rated for 30V drain-to-source voltage and 140A continuous drain current at 25°C. The device is housed in a TO-220AB through-hole package and is rated for 200W power dissipation. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	140	A (Tc)
Power Dissipation (Max)	200	W (Tc)
Rds On (Max) @ 71A, 10V	5.5	mOhm
Gate Charge (Qg) @ 4.5V	76	nC
Input Capacitance (Ciss) @ 25V	3720	pF
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-220AB	Through Hole
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the IRL3803VPBF is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Must equal 30V
Package Type: Must be TO-220AB or TO-220-3 (through-hole compatible)
FET Type: Must be N-Channel MOSFET
Operating Temperature Range: Must support -55°C to 175°C
RoHS Compliance: Must maintain ROHS3 Compliant status

Secondary Compatibility Parameters:

Continuous Drain Current (Id): Substitute parts must support minimum 92A; higher ratings provide design margin
Power Dissipation: Substitute parts must support minimum 75W; higher ratings provide thermal margin
Rds On (Max): Lower values indicate improved efficiency; values between 2.1mOhm and 5.5mOhm are acceptable
Gate Charge (Qg): Lower values reduce switching losses; range 23nC to 117nC is acceptable
Input Capacitance (Ciss): Range 2139pF to 6810pF is acceptable

All substitute parts listed maintain identical voltage ratings, package compatibility, and compliance certifications as the main part.

Parameter Comparison

Parameter	IRL3803VPBF	IRLB8748PBF	FDP8874	PSMN2R0-30PL,127	PSMN4R3-30PL,127
Manufacturer	Infineon	Infineon	onsemi	Nexperia USA Inc.	Nexperia USA Inc.
Vdss (V)	30	30	30	30	30
Id @ 25°C (A)	140 (Tc)	92 (Tc)	114 (Tc)	100 (Tc)	100 (Tc)
Power Dissipation (W)	200	75	110	211	103
Rds On (Max) (mOhm)	5.5 @ 71A, 10V	4.8 @ 40A, 10V	5.3 @ 40A, 10V	2.1 @ 15A, 10V	4.3 @ 15A, 10V
Gate Charge (nC)	76 @ 4.5V	23 @ 4.5V	72 @ 10V	117 @ 10V	41.5 @ 10V
Input Capacitance (pF)	3720 @ 25V	2139 @ 15V	3130 @ 15V	6810 @ 12V	2400 @ 12V
Vgs (Max) (±V)	±16	±20	±20	±20	±20
Operating Temperature (°C)	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175
Package	TO-220AB	TO-220AB	TO-220-3	TO-220AB	TO-220AB
Product Status	Obsolete	Active	Obsolete	Obsolete	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

IRLB8748PBF (Infineon Technologies)

The IRLB8748PBF is an active product from the same manufacturer as the main part, providing continuity in design support and supply chain reliability. While the continuous drain current rating is lower at 92A compared to the IRL3803VPBF's 140A, this part is suitable for applications where the actual operating current does not exceed 92A. The IRLB8748PBF offers superior gate charge characteristics (23nC versus 76nC), resulting in reduced switching losses. This part is recommended for new designs requiring long-term availability and manufacturer support.

PSMN2R0-30PL,127 (Nexperia USA Inc.)

The PSMN2R0-30PL,127 provides the highest continuous drain current rating at 100A and the highest power dissipation capability at 211W, offering maximum thermal margin. The on-resistance is significantly lower at 2.1mOhm, providing improved efficiency in high-current applications. This part is suitable for designs where thermal performance and efficiency are critical. The higher gate charge (117nC) requires consideration in switching frequency applications.

PSMN4R3-30PL,127 (Nexperia USA Inc.)

The PSMN4R3-30PL,127 provides a balanced alternative with 100A continuous drain current and moderate on-resistance of 4.3mOhm. The gate charge is 41.5nC, offering a middle ground between switching loss and current handling capability. This part is suitable for general-purpose applications requiring reliable performance across a range of operating conditions.

FDP8874 (onsemi)

The FDP8874 is an alternative from a different manufacturer with 114A continuous drain current rating and 110W power dissipation. This part provides compatibility with applications requiring moderate current levels and is available in the TO-220-3 package variant. The on-resistance of 5.3mOhm is comparable to the main part.

Frequently Asked Questions (FAQ)

Q: Can the IRLB8748PBF replace the IRL3803VPBF in all applications?

A: The IRLB8748PBF is suitable for applications where the actual continuous drain current does not exceed 92A. If the design requires the full 140A capability of the IRL3803VPBF, the IRLB8748PBF is not appropriate. For applications operating below 92A, the IRLB8748PBF provides superior switching characteristics and active product status.

Q: What is the difference between TO-220AB and TO-220-3 packages?

A: Both TO-220AB and TO-220-3 are through-hole packages with identical pin configurations and mechanical compatibility. The designations refer to different manufacturer package specifications but are mechanically and electrically interchangeable for PCB mounting purposes.

Q: Why does the PSMN2R0-30PL,127 have higher power dissipation than the IRL3803VPBF?

A: Power dissipation rating is determined by the device's thermal characteristics and junction-to-case thermal resistance. The PSMN2R0-30PL,127 has superior thermal design, allowing it to dissipate more power at the same junction temperature. This does not indicate higher actual power consumption; rather, it indicates better thermal performance.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all substitute parts listed in this document are ROHS3 Compliant, maintaining regulatory compliance with the main part.

Q: Which substitute part has the lowest on-resistance?

A: The PSMN2R0-30PL,127 has the lowest on-resistance at 2.1mOhm, providing the highest efficiency in high-current applications. However, this part has higher gate charge, which may increase switching losses at high switching frequencies.

Q: Can I use a substitute part with lower current rating if my application uses less current?

A: Yes, substitute parts with lower current ratings can be used if the actual operating current is below the substitute part's rating. However, ensure that the power dissipation rating is sufficient for your application's thermal requirements.

Q: What is the significance of gate charge in MOSFET selection?

A: Gate charge determines the energy required to switch the MOSFET on and off. Lower gate charge reduces switching losses and allows for higher switching frequencies. The IRLB8748PBF has significantly lower gate charge (23nC) compared to the IRL3803VPBF (76nC), making it more suitable for high-frequency switching applications.

Q: Are all substitute parts available in the same packaging as the IRL3803VPBF?

A: All substitute parts are available in TO-220 through-hole packages. The IRLB8748PBF, PSMN2R0-30PL,127, and PSMN4R3-30PL,127 are in TO-220AB packaging. The FDP8874 is in TO-220-3 packaging. Both package variants are mechanically compatible with standard TO-220 PCB footprints.

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