STR1P2UH7 Equivalent & Substitute Parts

Part Overview

The STR1P2UH7 is a P-Channel MOSFET manufactured by STMicroelectronics, rated for 20V drain-to-source voltage with 1.4A continuous drain current at 25°C. The device is housed in a SOT-23-3 surface mount package and is designed for general-purpose switching applications requiring compact form factors. The STR1P2UH7 is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value	Unit
FET Type	P-Channel	—
Drain to Source Voltage (Vdss)	20	V
Current - Continuous Drain (Id) @ 25°C	1.4	A (Ta)
Rds On (Max) @ Id, Vgs	100 mOhm @ 700 mA, 4.5V	—
Vgs(th) (Max) @ Id	1	V @ 250 µA
Gate Charge (Qg) (Max) @ Vgs	4.8	nC @ 4.5 V
Vgs (Max)	±8	V
Input Capacitance (Ciss) (Max) @ Vds	510	pF @ 10 V
Power Dissipation (Max)	350	mW (Tc)
Operating Temperature (TJ)	150	°C
Mounting Type	Surface Mount	—
Package / Case	SOT-23-3 (TO-236-3, SC-59)	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the STR1P2UH7 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

FET Type: P-Channel (required)
Drain to Source Voltage (Vdss): 20V (required)
Package / Case: SOT-23-3 (required for mechanical compatibility)
Mounting Type: Surface Mount (required)
Gate-Source Voltage (Vgs Max): ±8V (required)

Functional Compatibility Parameters:

Continuous Drain Current (Id) @ 25°C: Substitute must equal or exceed 1.4A
Rds On (Max): Substitute must not exceed 100 mOhm at specified conditions
Vgs(th) (Max): Substitute must not exceed 1V @ 250µA
Gate Charge (Qg): Substitute must not exceed 4.8 nC @ 4.5V
Input Capacitance (Ciss): Substitute must not exceed 510 pF @ 10V
Power Dissipation (Max): Substitute must support minimum 350 mW (Tc)
Operating Temperature: Substitute must support minimum 150°C (TJ)

All substitute parts listed meet or exceed these parameters and are classified as active products with current manufacturing status and full RoHS3 compliance.

Parameter Comparison

Parameter	STR1P2UH7 (Main)	DMG2301L-13	DMG2301L-7	NTR4101PT1H	PJA3431_R1_00001
Manufacturer	STMicroelectronics	Diodes Incorporated	Diodes Incorporated	onsemi	Panjit International Inc.
FET Type	P-Channel	P-Channel	P-Channel	P-Channel	P-Channel
Vdss	20 V	20 V	20 V	20 V	20 V
Id @ 25°C	1.4 A (Ta)	3 A (Ta)	3 A (Ta)	1.8 A (Ta)	1.5 A (Ta)
Rds On (Max) @ Id, Vgs	100 mOhm @ 700 mA, 4.5V	120 mOhm @ 2.8A, 4.5V	120 mOhm @ 2.8A, 4.5V	85 mOhm @ 1.6A, 4.5V	325 mOhm @ 1.5A, 4.5V
Vgs(th) (Max) @ Id	1 V @ 250 µA	1.2 V @ 250 µA	1.2 V @ 250 µA	1.2 V @ 250 µA	1 V @ 250 µA
Gate Charge (Qg) (Max) @ Vgs	4.8 nC @ 4.5 V	5.5 nC @ 4.5 V	5.5 nC @ 4.5 V	8.5 nC @ 4.5 V	1.7 nC @ 4.5 V
Vgs (Max)	±8 V	±8 V	±8 V	±8 V	±8 V
Ciss (Max) @ Vds	510 pF @ 10 V	476 pF @ 10 V	476 pF @ 10 V	675 pF @ 10 V	165 pF @ 10 V
Power Dissipation (Max)	350 mW (Tc)	1.5 W (Ta)	1.5 W (Ta)	420 mW (Ta)	1.25 W (Ta)
Operating Temperature (TJ)	150 °C	-55 °C ~ 150 °C	-55 °C ~ 150 °C	-55 °C ~ 150 °C	-55 °C ~ 150 °C
Package / Case	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

DMG2301L-7 (Diodes Incorporated) and DMG2301L-13 (Diodes Incorporated) are functionally equivalent to the STR1P2UH7 with enhanced current handling capability (3A vs. 1.4A). Both devices maintain the 20V Vdss rating, SOT-23-3 package, and ±8V Vgs maximum specification. These parts are active products with full RoHS3 compliance and unlimited moisture sensitivity rating. The DMG2301L-7 variant offers superior inventory availability (122,200 units) and is supplied in Cut Tape and Digi-Reel packaging.

Secondary Substitute (Close Electrical Match):

NTR4101PT1H (onsemi) provides a near-direct replacement with 1.8A continuous drain current, exceeding the STR1P2UH7 specification by 0.4A. This device features superior Rds On performance (85 mOhm @ 1.6A, 4.5V) compared to the main part. The NTR4101PT1H is an active product with RoHS3 compliance and operates across the -55°C to 150°C temperature range. Gate charge specification (8.5 nC) exceeds the main part by 3.7 nC, which may impact switching speed in timing-critical applications.

Alternative Substitute (Functional Compatibility):

PJA3431_R1_00001 (Panjit International Inc.) meets the 20V Vdss and SOT-23-3 package requirements with 1.5A continuous drain current. This device exhibits significantly higher Rds On (325 mOhm @ 1.5A, 4.5V) and lower gate charge (1.7 nC @ 4.5V) compared to the main part. The PJA3431_R1_00001 is an active product with full RoHS3 compliance and is suitable for applications where lower switching losses are prioritized over on-state resistance performance.

All substitute parts are RoHS3 compliant, carry MSL rating of 1 (Unlimited), and are classified as active products with current manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can the DMG2301L-7 directly replace the STR1P2UH7 in existing designs?

A: The DMG2301L-7 is mechanically and electrically compatible with the STR1P2UH7. Both devices share the SOT-23-3 package, 20V Vdss rating, and ±8V Vgs maximum specification. The DMG2301L-7 provides higher continuous drain current (3A vs. 1.4A) and improved power dissipation capability (1.5W vs. 350mW), making it suitable for applications requiring equal or greater current handling. Pin configuration and gate drive requirements are identical.

Q: What is the primary difference between DMG2301L-7 and DMG2301L-13?

A: Both DMG2301L-7 and DMG2301L-13 are electrically identical P-Channel MOSFETs with 20V Vdss and 3A continuous drain current. The difference lies in packaging and inventory: DMG2301L-7 is supplied in Cut Tape and Digi-Reel format with 122,200 units in stock, while DMG2301L-13 is supplied in Tape & Reel format with 7,995 units available. Selection depends on procurement requirements and assembly equipment compatibility.

Q: Is the NTR4101PT1H suitable for applications with strict switching speed requirements?

A: The NTR4101PT1H exhibits higher gate charge (8.5 nC @ 4.5V) compared to the STR1P2UH7 (4.8 nC @ 4.5V), resulting in slower switching transitions. Applications requiring fast switching response may experience increased switching losses with this device. However, the NTR4101PT1H provides superior on-state resistance (85 mOhm @ 1.6A, 4.5V), reducing conduction losses. Selection should be based on the specific application's switching frequency and thermal requirements.

Q: Why does the PJA3431_R1_00001 have significantly higher Rds On than other substitutes?

A: The PJA3431_R1_00001 exhibits Rds On of 325 mOhm @ 1.5A, 4.5V, which is substantially higher than the STR1P2UH7 (100 mOhm @ 700mA, 4.5V) and other substitutes. This characteristic reflects different design optimization priorities. The PJA3431_R1_00001 is optimized for minimal gate charge (1.7 nC @ 4.5V), enabling faster switching with lower gate drive power. This device is suitable for high-frequency switching applications where conduction losses are secondary to switching losses.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts—DMG2301L-7, DMG2301L-13, NTR4101PT1H, and PJA3431_R1_00001—are RoHS3 compliant. All devices carry MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling.

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

A: The STR1P2UH7 specifies a maximum junction temperature (TJ) of 150°C. All substitute parts support this specification with extended operating ranges: DMG2301L-7, DMG2301L-13, NTR4101PT1H, and PJA3431_R1_00001 all operate across -55°C to 150°C (TJ), providing superior low-temperature performance compared to the main part.

Q: Can substitute parts be used in existing PCB layouts without modification?

A: All substitute parts utilize the SOT-23-3 package (TO-236-3, SC-59), which is mechanically identical to the STR1P2UH7. PCB footprints, land patterns, and pin assignments are compatible without modification. No layout changes are required for direct substitution.

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