SI2301A-TP P-Channel MOSFET 20V 2.8A Equivalent & Substitute Parts

Part Overview

The SI2301A-TP is a P-Channel Metal Oxide Semiconductor Field Effect Transistor (MOSFET) manufactured by Micro Commercial Co, 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 2.8A at 25°C and a maximum power dissipation of 1.25W. The part is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required, or when design optimization calls for different electrical characteristics within the same functional category. All substitute parts listed maintain compatibility with the core electrical specifications and physical form factor of the SI2301A-TP.

Key Parameters

Parameter	SI2301A-TP	Unit
FET Type	P-Channel	—
Drain to Source Voltage (Vdss)	20	V
Continuous Drain Current (Id) @ 25°C	2.8	A
Rds On (Max) @ Id, Vgs	120 mOhm @ 2.8A, 4.5V	—
Power Dissipation (Max)	1.25	W
Operating Temperature Range	-55 to 150	°C
Package / Case	SOT-23-3 (TO-236-3, SC-59)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SI2301A-TP is determined by the following critical parameters:

Primary Substitution Criteria:

FET Type: P-Channel (all substitutes must be P-Channel)
Drain to Source Voltage (Vdss): Minimum 20V (equal or greater)
Package / Case: SOT-23-3 (TO-236-3, SC-59) physical compatibility
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 150°C minimum
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: MSL 1 (Unlimited)

Secondary Substitution Criteria:

Continuous Drain Current (Id): 2.8A or greater at 25°C
Rds On (Max): 120 mOhm or lower at rated current and gate voltage
Power Dissipation: 1.25W or greater

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents: Parts meeting or exceeding all primary and secondary criteria with minimal parameter deviation. These parts are suitable for direct replacement without circuit redesign.

Category B - Functional Equivalents with Parameter Trade-offs: Parts meeting primary criteria but with reduced current rating or power dissipation. These parts are suitable for applications where the full 2.8A continuous current is not required.

Parameter Comparison

Parameter	SI2301A-TP	FDN336P	FDN338P	FDV304P	NDS332P	NTR1P02LT1G	NTR1P02T1G	NVTR01P02LT1G
Manufacturer	Micro Commercial Co	onsemi	UMW	onsemi	onsemi	onsemi	onsemi	onsemi
FET Type	P-Channel	P-Channel	P-Channel	P-Channel	P-Channel	P-Channel	P-Channel	P-Channel
Vdss (V)	20	20	20	25	20	20	20	20
Id @ 25°C (A)	2.8	1.3	2.8	0.46	1	1.3	1	1.3
Rds On (Max) (mOhm)	120 @ 2.8A, 4.5V	200 @ 1.3A, 4.5V	112 @ 2.8A, 4.5V	1100 @ 0.5A, 4.5V	300 @ 1.1A, 4.5V	220 @ 0.75A, 4.5V	180 @ 1.5A, 10V	220 @ 0.75A, 4.5V
Power Dissipation (Max) (W)	1.25	0.5	0.4	0.35	0.5	0.4	0.4	0.4
Operating Temperature (°C)	-55 to 150	-55 to 150	to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	—
Package	SOT-23-3	SOT-23-3	SOT-23	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Replacement (Category A):

The FDN338P (UMW) is the closest electrical equivalent to the SI2301A-TP. It matches the 20V Vdss rating, provides 2.8A continuous drain current at 25°C, and delivers superior Rds On performance at 112 mOhm versus 120 mOhm. The FDN338P is RoHS3 compliant, MSL 1, and housed in the SOT-23 package. However, power dissipation is rated at 400 mW (Ta) compared to 1.25W for the SI2301A-TP, which may limit thermal performance in high-power applications.

Functional Equivalents with Reduced Current Rating (Category B):

The FDN336P (onsemi) and NTR1P02LT1G (onsemi) are suitable substitutes for applications requiring less than 2.8A continuous current. Both devices maintain 20V Vdss, operate across the -55°C to 150°C temperature range, and are RoHS3 compliant with MSL 1. The FDN336P provides 1.3A at 200 mOhm Rds On, while NTR1P02LT1G offers 1.3A at 220 mOhm Rds On. Both are available in SOT-23-3 packaging.

The NTR1P02T1G (onsemi) is a lower-current variant rated for 1A continuous drain current with 180 mOhm Rds On at 10V gate voltage. This part is suitable for low-current switching applications and is RoHS3 compliant with full temperature range support.

Automotive-Grade Alternative:

The NVTR01P02LT1G (onsemi) is an AEC-Q101 qualified automotive-grade P-Channel MOSFET with 1.3A continuous current, 20V Vdss, and 220 mOhm Rds On. This part is supplied in Tape & Reel packaging and is suitable for automotive applications requiring functional equivalence with reduced current capacity.

Limited Current Applications:

The NDS332P (onsemi) is rated for 1A continuous drain current with 300 mOhm Rds On at 4.5V gate voltage. This part is suitable only for applications where current demand does not exceed 1A and is not recommended as a primary substitute for the SI2301A-TP.

The FDV304P (onsemi) is rated for only 460 mA continuous drain current and 1.1 Ohm Rds On. This part is suitable only for low-current signal switching applications and is not recommended for the SI2301A-TP substitution.

Frequently Asked Questions (FAQ)

Q: Can the FDN336P directly replace the SI2301A-TP in all applications?

A: The FDN336P is a functional equivalent for applications requiring continuous drain current of 1.3A or less. The SI2301A-TP is rated for 2.8A continuous current, so the FDN336P is not suitable for high-current applications. Both parts share identical 20V Vdss rating, SOT-23-3 package, and operating temperature range. Verify that your application current requirements do not exceed 1.3A before substitution.

Q: What is the difference between the NTR1P02LT1G and NVTR01P02LT1G?

A: Both parts are rated for 1.3A continuous drain current at 20V Vdss with 220 mOhm Rds On. The primary difference is that NVTR01P02LT1G is AEC-Q101 qualified for automotive applications, while NTR1P02LT1G is a commercial-grade device. The NVTR01P02LT1G is supplied in Tape & Reel packaging, whereas NTR1P02LT1G is available in Cut Tape & Digi-Reel format. Select NVTR01P02LT1G for automotive designs requiring functional equivalence with reduced current capacity.

Q: Why does the FDN338P have lower power dissipation than the SI2301A-TP?

A: The FDN338P is rated for 400 mW (Ta) maximum power dissipation compared to 1.25W for the SI2301A-TP. This difference reflects the thermal design and package thermal characteristics of each device. The FDN338P delivers superior Rds On performance (112 mOhm versus 120 mOhm), which reduces resistive losses. However, the lower power dissipation rating indicates reduced thermal capacity. Verify thermal requirements in your application before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (FDN336P, FDN338P, FDV304P, NDS332P, NTR1P02LT1G, NTR1P02T1G, and NVTR01P02LT1G) are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the SI2301A-TP compliance status.

Q: Can I use the FDV304P as a substitute for the SI2301A-TP?

A: The FDV304P is not recommended as a substitute for the SI2301A-TP. While both are P-Channel MOSFETs in SOT-23-3 packages, the FDV304P is rated for only 460 mA continuous drain current and 1.1 Ohm Rds On, which is significantly lower than the SI2301A-TP specifications. The FDV304P is suitable only for low-current signal switching applications.

Q: What is the significance of the Rds On parameter in substitution?

A: Rds On (on-state drain-source resistance) directly affects power dissipation and switching performance. Lower Rds On values result in reduced resistive losses and lower heat generation. The SI2301A-TP specifies 120 mOhm Rds On at 2.8A and 4.5V gate voltage. Substitute parts with higher Rds On values will generate more heat at the same current level. Verify that your thermal design accommodates the Rds On characteristics of the substitute part.

Q: Are the substitute parts available in the same packaging format as the SI2301A-TP?

A: The SI2301A-TP is supplied in Tape & Reel (TR) packaging. Most substitute parts are available in Cut Tape (CT) & Digi-Reel format, with the exception of NVTR01P02LT1G, which is also supplied in Tape & Reel. All substitute parts are housed in the SOT-23-3 (TO-236-3, SC-59) package, ensuring physical compatibility with the SI2301A-TP footprint.

Q: What is the operating temperature range for all substitute parts?

A: The SI2301A-TP operates from -55°C to 150°C (Tj). All substitute parts except NVTR01P02LT1G specify the same -55°C to 150°C operating temperature range. The NVTR01P02LT1G does not specify an explicit operating temperature range in the provided data. Verify temperature requirements for automotive applications before selecting NVTR01P02LT1G.

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