DMP2123LQ-13 Equivalent & Substitute Parts

Part Overview

The DMP2123LQ-13 is a P-Channel MOSFET manufactured by Diodes Incorporated, rated for 20V drain-to-source voltage with 3A 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 low on-resistance performance. The part is Active in product status and RoHS3 compliant. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing, packaging formats, or when specific performance trade-offs are acceptable within application parameters.

Key Parameters

Parameter	Value	Unit
FET Type	P-Channel	—
Drain to Source Voltage (Vdss)	20	V
Continuous Drain Current (Id) @ 25°C	3	A
Rds On (Max) @ Id, Vgs	72 mOhm @ 3.5A, 4.5V	—
Gate Threshold Voltage (Vgs(th)) @ Id	1.25	V @ 250µA
Power Dissipation (Max)	1.4	W
Operating Temperature Range	-55 to 150	°C
Package Type	SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the DMP2123LQ-13 is determined by the following critical parameters: drain-to-source voltage rating (Vdss), continuous drain current capability (Id), on-resistance (Rds On), gate threshold voltage (Vgs(th)), power dissipation rating, operating temperature range, and package compatibility (SOT-23-3). Parts are grouped into two categories:

Parametric Equivalents: Parts with identical or superior electrical specifications across all critical parameters, allowing direct replacement without circuit modification.

Manufacturer Recommended Substitutes: Parts with reduced current ratings or modified electrical characteristics that require application-level verification but maintain voltage rating, package form factor, and temperature range compatibility.

All substitute parts listed maintain P-Channel MOSFET technology, SOT-23-3 package compatibility, RoHS3 compliance, and surface mount mounting type.

Parameter Comparison

Parameter	DMP2123LQ-13	DMP2123L-7	DMP2123LQ-7	AO3423	FDN340P	NTRV4101PT1G
Manufacturer	Diodes Inc.	Diodes Inc.	Diodes Inc.	Alpha & Omega	UMW	onsemi
FET Type	P-Channel	P-Channel	P-Channel	P-Channel	P-Channel	P-Channel
Vdss (V)	20	20	20	20	20	20
Id @ 25°C (A)	3	3	3	2	2	1.8
Rds On (Max) (mOhm)	72 @ 3.5A, 4.5V	72 @ 3.5A, 4.5V	72 @ 3.5A, 4.5V	92 @ 2A, 10V	70 @ 2A, 4.5V	85 @ 1.6A, 4.5V
Vgs(th) (Max) @ 250µA (V)	1.25	1.25	1.25	1.4	1.5	1.2
Gate Charge (Qg) @ 4.5V (nC)	7.3	7.3	7.3	6.6	8	8.5
Power Dissipation (Max) (W)	1.4	1.4	1.4	1.4	1.1	0.42
Operating Temperature (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 150	to 150	-55 to 150
Package	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3
Packaging Format	Tape & Reel	Cut Tape & Digi-Reel	Tape & Reel	Cut Tape & Digi-Reel	Cut Tape & Digi-Reel	Tape & Reel
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade	—	—	—	—	—	AEC-Q101

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalents):

DMP2123L-7 and DMP2123LQ-7 are parametric equivalents to the DMP2123LQ-13. Both parts share identical electrical specifications including 20V Vdss, 3A continuous drain current, 72 mOhm Rds On, and 1.4W power dissipation. The primary difference is packaging format: DMP2123L-7 is supplied in Cut Tape & Digi-Reel format, while DMP2123LQ-7 is supplied in Tape & Reel format matching the original part. Both are Active status, RoHS3 compliant, and suitable for direct circuit substitution without performance degradation.

Reduced Current Substitutes (Manufacturer Recommended):

AO3423 (Alpha & Omega Semiconductor) and FDN340P (UMW) are manufacturer-recommended substitutes with reduced continuous drain current ratings of 2A compared to the 3A specification of the DMP2123LQ-13. Both maintain 20V Vdss rating and SOT-23-3 package compatibility. These parts are suitable for applications where the 3A current capability is not fully utilized. AO3423 maintains 1.4W power dissipation; FDN340P is rated at 1.1W. Both are Active status and RoHS3 compliant.

Lower Power Substitutes (Automotive Qualified):

NTRV4101PT1G (onsemi) is an automotive-qualified substitute rated for 1.8A continuous drain current and 420mW power dissipation. This part carries AEC-Q101 qualification and is suitable for automotive applications requiring lower power dissipation. The 20V Vdss rating and SOT-23-3 package are maintained. This part is Active status and RoHS3 compliant.

All substitute parts maintain the -55°C to 150°C operating temperature range (or equivalent upper limit) and are surface mount devices in SOT-23-3 package form factor.

Frequently Asked Questions (FAQ)

Q: Can DMP2123L-7 be used as a direct replacement for DMP2123LQ-13?

A: Yes. DMP2123L-7 is a parametric equivalent with identical electrical specifications. The only difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel). Both parts have 3A continuous drain current, 72 mOhm Rds On, and 1.4W power dissipation.

Q: What is the difference between DMP2123LQ-7 and DMP2123LQ-13?

A: Both parts are parametric equivalents with identical electrical specifications. The suffix difference (-7 versus -13) indicates different manufacturing date codes or internal revision levels, but electrical performance is equivalent. DMP2123LQ-7 has higher inventory availability.

Q: Can AO3423 replace DMP2123LQ-13 in all applications?

A: AO3423 is suitable for applications where continuous drain current does not exceed 2A. The DMP2123LQ-13 is rated for 3A; therefore, AO3423 is not suitable for circuits requiring the full 3A capability. Both parts maintain 20V Vdss, SOT-23-3 package, and 1.4W power dissipation.

Q: Is FDN340P suitable for high-power applications?

A: FDN340P is rated for 1.1W power dissipation, lower than the DMP2123LQ-13 specification of 1.4W. This part is suitable for applications with reduced power dissipation requirements. Continuous drain current is limited to 2A.

Q: What is the advantage of NTRV4101PT1G?

A: NTRV4101PT1G carries AEC-Q101 automotive qualification, making it suitable for automotive applications. However, it is rated for 1.8A continuous drain current and 420mW power dissipation, both lower than the DMP2123LQ-13. This part is appropriate for automotive designs with lower current and power requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (DMP2123L-7, DMP2123LQ-7, AO3423, FDN340P, and NTRV4101PT1G) are RoHS3 compliant and maintain Moisture Sensitivity Level 1 (Unlimited).

Q: Can I use a substitute part with lower current rating if my circuit only draws 2A?

A: Yes, provided the application does not require the full 3A capability of the DMP2123LQ-13. AO3423 and FDN340P are rated for 2A continuous drain current and are suitable for such applications. Verify that power dissipation and thermal management remain within acceptable limits.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape & Digi-Reel format is supplied in individual tape segments suitable for manual or small-scale assembly. Tape & Reel format is supplied on continuous reels suitable for high-volume automated assembly. Electrical specifications are identical; packaging format selection depends on production volume and assembly equipment.

Q: Are all substitute parts available in SOT-23-3 package?

A: Yes. All listed substitute parts are housed in SOT-23-3 package (also designated TO-236-3 or SC-59), ensuring mechanical and electrical pin compatibility with the DMP2123LQ-13.

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