IRLML6402TR P-Channel MOSFET 20V 3.7A SOT-23 Equivalent & Substitute Parts

Part Overview

The IRLML6402TR is a P-Channel Metal Oxide Semiconductor Field Effect Transistor (MOSFET) manufactured by Infineon Technologies, designed for surface mount applications in the SOT-23 package. This device operates at a maximum drain-source voltage of 20V with a continuous drain current rating of 3.7A at 25°C. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across critical parameters including voltage rating, current capacity, on-resistance characteristics, and gate charge specifications while accommodating the same or compatible package footprints.

Key Parameters

Parameter	Value	Unit	Condition
FET Type	P-Channel	—	—
Drain to Source Voltage (Vdss)	20	V	Maximum rating
Continuous Drain Current (Id)	3.7	A	@ 25°C (Ta)
On-Resistance (Rds On)	65	mOhm	@ 3.7A, 4.5V Vgs
Gate-Source Threshold Voltage (Vgs(th))	1.2	V	@ 250µA Id
Gate Charge (Qg)	12	nC	@ 5V Vgs
Input Capacitance (Ciss)	633	pF	@ 10V Vds
Package Type	SOT-23-3 / TO-236-3	—	Surface Mount
Product Status	Obsolete	—	—

Substitute Part Grouping Explanation

Substitution of the IRLML6402TR is determined by strict adherence to the following electrical and mechanical criteria:

Primary Substitution Criteria:

FET channel type must be P-Channel
Drain-source voltage rating (Vdss) must be ≥20V
Continuous drain current (Id) must be ≥3.7A at 25°C
On-resistance (Rds On) at rated conditions must not exceed 65mOhm
Gate-source threshold voltage (Vgs(th)) must be compatible with 4.5V gate drive
Package must be SOT-23-3 / TO-236-3 or mechanically equivalent footprint
Surface mount mounting type required

Substitute Parts Identified:

Group 1: Direct Electrical Equivalents (P-Channel, 20V, ≥3.7A)

IRLML6402TRPBF (Infineon Technologies) — Active product status, RoHS3 compliant
PMV50XPR (Nexperia USA Inc.) — 3.6A rating, Active status, RoHS3 compliant
PMV48XP,215 (Nexperia USA Inc.) — 3.5A rating, Active status, RoHS3 compliant

Group 2: Reduced Current Rating (P-Channel, 20V, <3.7A)

PMV65XPEAR (Nexperia USA Inc.) — 2.8A rating, Automotive qualified, AEC-Q100, Active status

Group 3: Non-Equivalent (Channel Type Mismatch)

AO3402 (Alpha & Omega Semiconductor Inc.) — N-Channel device, not suitable for direct substitution

Parameter Comparison

Parameter	IRLML6402TR	IRLML6402TRPBF	PMV50XPR	PMV48XP,215	PMV65XPEAR
Manufacturer	Infineon	Infineon	Nexperia	Nexperia	Nexperia
FET Type	P-Channel	P-Channel	P-Channel	P-Channel	P-Channel
Vdss (V)	20	20	20	20	20
Id @ 25°C (A)	3.7	3.7	3.6	3.5	2.8
Rds On (mOhm)	65 @ 3.7A, 4.5V	65 @ 3.7A, 4.5V	60 @ 3.6A, 4.5V	55 @ 2.4A, 4.5V	78 @ 2.8A, 4.5V
Vgs(th) (V)	1.2 @ 250µA	1.2 @ 250µA	0.9 @ 250µA	1.25 @ 250µA	1.25 @ 250µA
Qg (nC)	12 @ 5V	12 @ 5V	12 @ 4.5V	11 @ 4.5V	9 @ 4.5V
Ciss (pF)	633 @ 10V	633 @ 10V	744 @ 20V	1000 @ 10V	618 @ 10V
Package	SOT-23-3	SOT-23-3	TO-236AB	TO-236AB	TO-236AB
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Non-compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: IRLML6402TRPBF

The IRLML6402TRPBF is the direct equivalent of the obsolete IRLML6402TR. This part maintains identical electrical specifications across all critical parameters: 20V Vdss, 3.7A continuous drain current, 65mOhm on-resistance, and 12nC gate charge. The IRLML6402TRPBF is manufactured by Infineon Technologies (the original manufacturer), carries Active product status, and is RoHS3 compliant. This part is suitable for direct replacement in existing designs without circuit modification.

Secondary Recommendations: PMV50XPR and PMV48XP,215

Both Nexperia parts provide P-Channel operation at 20V with current ratings of 3.6A and 3.5A respectively, meeting or exceeding the minimum current requirement for most applications. The PMV50XPR offers superior on-resistance performance (60mOhm) and lower gate charge (12nC), while the PMV48XP,215 provides the lowest on-resistance among Nexperia alternatives (55mOhm). Both parts are Active, RoHS3 compliant, and available in TO-236AB packaging. Selection between these two depends on current headroom requirements and thermal design constraints.

Conditional Recommendation: PMV65XPEAR

The PMV65XPEAR is suitable only for applications where the continuous drain current requirement does not exceed 2.8A. This part offers the advantage of automotive qualification (AEC-Q100) and is recommended for automotive-grade designs. The higher on-resistance (78mOhm) and lower gate charge (9nC) must be evaluated against specific circuit requirements.

Not Recommended: AO3402

The AO3402 is an N-Channel MOSFET and is not electrically equivalent to the P-Channel IRLML6402TR. This part cannot serve as a direct substitute and would require complete circuit redesign.

Frequently Asked Questions (FAQ)

Q1: Can IRLML6402TRPBF be used as a direct replacement for IRLML6402TR?

Yes. The IRLML6402TRPBF is the active equivalent manufactured by Infineon Technologies with identical electrical specifications. No circuit modifications are required. The primary difference is product status (Active vs. Obsolete) and RoHS compliance (RoHS3 vs. Non-compliant).

Q2: What is the difference between SOT-23-3 and TO-236AB packaging?

SOT-23-3 and TO-236AB are mechanically equivalent package designations for the same three-lead surface mount form factor. Both packages have identical pin pitch, lead dimensions, and PCB footprint. Parts specified in either designation are physically interchangeable.

Q3: Why is the AO3402 listed as a substitute if it is not recommended?

The AO3402 was included in the original substitute list provided by the manufacturer. However, the AO3402 is an N-Channel device, while the IRLML6402TR is P-Channel. These are fundamentally different device types and cannot be substituted without complete circuit redesign. The AO3402 is not suitable for applications requiring P-Channel operation.

Q4: Can PMV65XPEAR be used in applications requiring 3.7A continuous current?

No. The PMV65XPEAR is rated for a maximum continuous drain current of 2.8A at 25°C. Using this part in applications requiring 3.7A would exceed the device rating and result in thermal stress and potential failure. The PMV50XPR or PMV48XP,215 are appropriate alternatives for full current capacity.

Q5: What are the key electrical differences between the Nexperia alternatives?

The three Nexperia P-Channel alternatives differ primarily in current rating and on-resistance characteristics. PMV50XPR provides 3.6A at 60mOhm, PMV48XP,215 provides 3.5A at 55mOhm, and PMV65XPEAR provides 2.8A at 78mOhm. Gate charge and input capacitance also vary. Selection depends on the specific current and thermal requirements of the application.

Q6: Are all substitute parts RoHS3 compliant?

All recommended substitute parts (IRLML6402TRPBF, PMV50XPR, PMV48XP,215, and PMV65XPEAR) are RoHS3 compliant. The original IRLML6402TR is RoHS non-compliant. Compliance status should be verified against specific procurement requirements.

Q7: What is the significance of the lower gate threshold voltage in PMV50XPR?

The PMV50XPR has a gate threshold voltage (Vgs(th)) of 0.9V compared to 1.2V in the IRLML6402TR. This lower threshold voltage allows the device to turn on at lower gate drive voltages, which may improve switching speed and reduce gate drive power requirements in some applications. Circuit simulation is recommended to verify compatibility with existing gate drive circuits.

Q8: Can these parts be used interchangeably in existing PCB designs?

Yes, provided the PCB footprint accommodates SOT-23-3 or TO-236AB packages (which are mechanically equivalent). Electrical compatibility must be verified through circuit analysis, particularly regarding gate drive voltage, current requirements, and thermal dissipation. The IRLML6402TRPBF is the safest choice for direct substitution due to identical specifications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message