IRLML5203 P-Channel MOSFET 30V 3A Equivalent & Substitute Parts

Part Overview

The IRLML5203 is a P-Channel MOSFET manufactured by Infineon Technologies, rated for 30V drain-to-source voltage with 3A continuous drain current at 25°C. This device is packaged in the Micro3™/SOT-23 surface mount form factor and is designed for low-power switching applications requiring compact board space.

The IRLML5203 carries an Obsolete product status. Equivalent and substitute parts are necessary to ensure design continuity, maintain supply chain reliability, and access active production alternatives that meet the same electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	3	A
On-Resistance (Rds On) @ 3A, 10V	98	mOhm
Gate-Source Threshold Voltage (Vgs(th)) @ 250µA	2.5	V
Gate Charge (Qg) @ 10V	14	nC
Maximum Gate-Source Voltage (Vgs)	±20	V
Input Capacitance (Ciss) @ 25V	510	pF
Power Dissipation (Max)	1.25	W
Package Type	SOT-23-3 (Micro3™)	—
Mounting Type	Surface Mount	—
FET Type	P-Channel	—
Technology	MOSFET (Metal Oxide)	—

Substitute Part Grouping Explanation

Substitution of the IRLML5203 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 30V
Continuous Drain Current (Id): Must equal or exceed 3A at 25°C
Package Type: Must be SOT-23-3, TO-236-3, or SC-59 (mechanically and electrically equivalent)
FET Type: Must be P-Channel
Technology: Must be MOSFET (Metal Oxide)
On-Resistance (Rds On): Lower or equal values are acceptable; higher values indicate reduced performance
Gate-Source Threshold Voltage (Vgs(th)): Must be compatible with drive circuit requirements
Maximum Gate-Source Voltage (Vgs): Must accommodate ±20V or greater

Secondary Compatibility Parameters:

Gate Charge (Qg): Lower values reduce switching losses
Input Capacitance (Ciss): Lower values improve switching speed
Power Dissipation: Lower values indicate improved thermal performance
Operating Temperature Range: Must support -55°C to 150°C (TJ) minimum
RoHS Compliance: Active substitutes must be ROHS3 compliant
Moisture Sensitivity Level (MSL): Must be MSL 1 (Unlimited)

Substitutes are grouped into two categories:

Category 1: Direct Electrical Equivalents (Same Vdss, Id, Rds On)

IRLML5203TRPBF (Infineon Technologies) — Active product status, identical specifications, tape & reel packaging
RRR030P03TL (Rohm Semiconductor) — Matching Vdss, Id, and Rds On; Not For New Designs status

Category 2: Functional Alternatives (Vdss ≥ 30V, Id ≥ 2.7A, Compatible Package)

DMP3160L-7 (Diodes Incorporated) — 30V, 2.7A, lower Rds On (122mOhm)
NTR4171PT1G (onsemi) — 30V, 2.2A, lower Rds On (75mOhm)
PJA3409-AU_R1_000A1 (Panjit International Inc.) — 30V, 2.9A, automotive qualified
PMV35EPER (Nexperia USA Inc.) — 30V, 5.3A, enhanced current capability
PMV50EPEAR (Nexperia USA Inc.) — 30V, 4.2A, automotive qualified
IRLML6402TRPBF (Infineon Technologies) — 20V, 3.7A, lower voltage rating

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On @ Id, 10V (mOhm)	Vgs(th) @ 250µA (V)	Qg @ 10V (nC)	Ciss @ Vds (pF)	Power Diss. (W)	Package	Status
IRLML5203	Infineon	30	3	98 @ 3A, 10V	2.5	14 @ 10V	510 @ 25V	1.25	SOT-23-3	Obsolete
IRLML5203TRPBF	Infineon	30	3	98 @ 3A, 10V	2.5	14 @ 10V	510 @ 25V	1.25	SOT-23-3	Active
RRR030P03TL	Rohm	30	3	75 @ 3A, 10V	2.5 @ 1mA	5.2 @ 5V	480 @ 10V	1	TSMT3	Not For New Designs
DMP3160L-7	Diodes Inc.	30	2.7	122 @ 2.7A, 10V	2.1	—	227 @ 10V	1.08	SOT-23-3	Active
NTR4171PT1G	onsemi	30	2.2	75 @ 2.2A, 10V	1.4	15.6 @ 10V	720 @ 15V	0.48	SOT-23-3	Active
PJA3409-AU_R1_000A1	Panjit	30	2.9	110 @ 2.9A, 10V	2.1	9.8 @ 10V	396 @ 15V	1.25	SOT-23	Active
PMV35EPER	Nexperia	30	5.3	45 @ 4.2A, 10V	3	19.2 @ 10V	793 @ 15V	0.48 (Ta), 1.2 (Tc)	TO-236AB	Active
PMV50EPEAR	Nexperia	30	4.2	45 @ 4.2A, 10V	3	19.2 @ 10V	793 @ 15V	0.31 (Ta), 0.455 (Tc)	TO-236AB	Active
IRLML6402TRPBF	Infineon	20	3.7	65 @ 3.7A, 4.5V	1.2	12 @ 5V	633 @ 10V	1.3	SOT-23-3	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

IRLML5203TRPBF is the primary recommended substitute. This part is manufactured by Infineon Technologies and carries Active product status. It provides identical electrical specifications to the obsolete IRLML5203, including 30V Vdss, 3A continuous drain current, and 98mOhm on-resistance at rated conditions. The part is ROHS3 compliant and available in Cut Tape and Digi-Reel® packaging formats. Inventory availability is 119,100 units.

For Applications Requiring Enhanced Current Capability:

PMV50EPEAR (Nexperia USA Inc.) and PMV35EPER (Nexperia USA Inc.) provide higher continuous drain current ratings (4.2A and 5.3A respectively) while maintaining 30V Vdss. Both parts are ROHS3 compliant and carry Active product status. PMV50EPEAR includes AEC-Q100 automotive qualification. These parts are suitable for designs where increased current headroom or reduced thermal dissipation is beneficial.

For Automotive Applications:

PJA3409-AU_R1_000A1 (Panjit International Inc.) and PMV50EPEAR (Nexperia USA Inc.) both carry automotive qualification. PJA3409-AU_R1_000A1 is AEC-Q101 qualified with 30V, 2.9A specifications. PMV50EPEAR is AEC-Q100 qualified with 30V, 4.2A specifications. Both are ROHS3 compliant and Active products.

For Lower Voltage Applications (20V Maximum):

IRLML6402TRPBF (Infineon Technologies) is suitable only for applications where the maximum drain-to-source voltage requirement does not exceed 20V. This part provides 3.7A continuous drain current and lower on-resistance (65mOhm at 3.7A, 4.5V) compared to the IRLML5203. It is ROHS3 compliant and Active.

Parts Not Recommended for New Designs:

RRR030P03TL (Rohm Semiconductor) carries Not For New Designs product status and should be avoided in new circuit development, despite matching electrical specifications.

Frequently Asked Questions (FAQ)

Q1: Can IRLML5203TRPBF be used as a direct drop-in replacement for IRLML5203?

A: Yes. IRLML5203TRPBF is electrically and mechanically identical to IRLML5203. Both devices feature 30V Vdss, 3A continuous drain current, 98mOhm on-resistance at rated conditions, and SOT-23-3 packaging. The primary difference is product status: IRLML5203TRPBF is Active, while IRLML5203 is Obsolete. IRLML5203TRPBF is available in Cut Tape and Digi-Reel® packaging.

Q2: What is the key difference between IRLML5203 and IRLML6402TRPBF?

A: The primary difference is drain-to-source voltage rating. IRLML6402TRPBF is rated for 20V maximum Vdss, compared to 30V for IRLML5203. IRLML6402TRPBF provides higher continuous drain current (3.7A versus 3A) and lower on-resistance (65mOhm at 3.7A, 4.5V versus 98mOhm at 3A, 10V). IRLML6402TRPBF is suitable only for applications where the maximum supply voltage does not exceed 20V.

Q3: Why do PMV35EPER and PMV50EPEAR have higher current ratings than IRLML5203?

A: PMV35EPER and PMV50EPEAR are designed with lower on-resistance (45mOhm at rated current versus 98mOhm for IRLML5203), which reduces resistive losses and allows higher current handling at the same power dissipation level. Both parts maintain 30V Vdss compatibility. These devices are suitable for applications requiring higher current capacity or improved thermal performance.

Q4: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed carry ROHS3 compliance status. The original IRLML5203 is RoHS non-compliant. ROHS3 compliance is a requirement for new designs in most markets.

Q5: What is the difference between SOT-23-3 and TO-236AB packaging?

A: SOT-23-3 (also designated TO-236-3 or SC-59) and TO-236AB are mechanically and electrically equivalent surface mount packages for three-terminal devices. Both packages have identical pin configurations and footprints. Parts specified with either designation are interchangeable at the PCB level.

Q6: Can DMP3160L-7 be used if the application requires exactly 3A continuous drain current?

A: DMP3160L-7 is rated for 2.7A continuous drain current at 25°C, which is below the 3A requirement of IRLML5203. This part is suitable only for applications where the maximum required drain current does not exceed 2.7A. For applications requiring 3A or higher, use IRLML5203TRPBF, RRR030P03TL, PJA3409-AU_R1_000A1, PMV35EPER, or PMV50EPEAR.

Q7: What does "Not For New Designs" product status mean for RRR030P03TL?

A: "Not For New Designs" indicates that the manufacturer (Rohm Semiconductor) is not recommending this part for new circuit development. While RRR030P03TL meets the electrical specifications of IRLML5203, it should be used only for legacy design maintenance or repair of existing products. For new designs, select from Active status alternatives such as IRLML5203TRPBF or PMV50EPEAR.

Q8: Which substitute part has the lowest on-resistance?

A: PMV35EPER and PMV50EPEAR both feature 45mOhm on-resistance at 4.2A and 10V gate-source voltage. This is significantly lower than IRLML5203 (98mOhm at 3A, 10V), resulting in reduced power dissipation and improved thermal performance. These parts are suitable for applications where minimizing resistive losses is critical.

Q9: Are automotive-qualified alternatives available?

A: Yes. PJA3409-AU_R1_000A1 (AEC-Q101 qualified) and PMV50EPEAR (AEC-Q100 qualified) are both automotive-grade alternatives. Both maintain 30V Vdss and are ROHS3 compliant with Active product status. Selection between these depends on specific current requirements: PJA3409-AU_R1_000A1 provides 2.9A, while PMV50EPEAR provides 4.2A.

Q10: What is the moisture sensitivity level (MSL) for all listed parts?

A: All parts, including IRLML5203 and all substitutes, carry MSL 1 (Unlimited) rating. This indicates the lowest moisture sensitivity classification, meaning these devices can be stored and handled without strict moisture control requirements and have unlimited shelf life under normal conditions.

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