DMN2104L-7 Equivalent & Substitute Parts

Part Overview

The DMN2104L-7 is an N-Channel MOSFET manufactured by Diodes Incorporated, rated for 20V drain-to-source voltage with 4.3A continuous drain current at 25°C. The device is packaged in SOT-23-3 surface mount configuration and is designed for general-purpose switching applications. The part is classified as Obsolete, necessitating identification of equivalent alternatives for ongoing production and design requirements. Substitute parts must maintain electrical compatibility across voltage ratings, current handling, and thermal characteristics while supporting the same or compatible package footprints.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Technology	MOSFET (Metal Oxide)	—
Drain to Source Voltage (Vdss)	20	V
Current - Continuous Drain (Id) @ 25°C	4.3	A
Rds On (Max) @ Id, Vgs	53 mOhm @ 4.2A, 4.5V	—
Vgs(th) (Max) @ Id	1.4 @ 250µA	V
Vgs (Max)	±12	V
Power Dissipation (Max)	1.4	W
Operating Temperature	-55 ~ 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	SOT-23-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the DMN2104L-7 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

FET Type: N-Channel
Technology: MOSFET (Metal Oxide)
Drain to Source Voltage (Vdss): 20V (minimum requirement)
Operating Temperature Range: -55°C to 150°C (TJ)
Package / Case: SOT-23-3 or compatible surface mount variants
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Performance Parameters for Functional Equivalence:

Current - Continuous Drain (Id) @ 25°C: Minimum 4.3A
Rds On (Max): ≤ 53 mOhm (at specified conditions)
Vgs(th) (Max): ≤ 1.4V @ 250µA
Power Dissipation (Max): ≥ 1.4W

Substitute parts may exceed the specified current rating, on-resistance, and power dissipation without compromising functionality. Parts with lower current ratings or higher on-resistance values are not suitable for direct substitution.

Parameter Comparison

Parameter	DMN2104L-7	DMG3420U-7	AO3414	BSS806NEH6327XTSA1	CPH3456-TL-W	PMV65UNER	RUR040N02TL
Manufacturer	Diodes Inc.	Diodes Inc.	Alpha & Omega	Infineon	onsemi	Nexperia	Rohm
FET Type	N-Channel	N-Channel	N-Channel	N-Channel	N-Channel	N-Channel	N-Channel
Vdss (V)	20	20	20	20	20	20	20
Id @ 25°C (A)	4.3	5.47	3	2.3	3.5	2.8	4
Rds On (Max) (mOhm)	53 @ 4.2A, 4.5V	29 @ 6A, 10V	50 @ 4.2A, 4.5V	57 @ 2.3A, 2.5V	71 @ 1.5A, 4.5V	73 @ 2.8A, 4.5V	35 @ 4A, 4.5V
Vgs(th) (Max) (V)	1.4 @ 250µA	1.2 @ 250µA	1 @ 250µA	0.75 @ 11µA	1.3 @ 1mA	1 @ 250µA	1.3 @ 1mA
Vgs (Max) (V)	±12	±12	±8	±8	±12	±8	±10
Power Dissipation (Max) (W)	1.4	0.74	1.4	0.5	1	0.49	1
Operating Temperature (°C)	-55 ~ 150	-55 ~ 150	-55 ~ 150	-55 ~ 150	150	-55 ~ 150	150
Package	SOT-23-3	SOT-23-3	SOT-23-3	PG-SOT23	3-CPH	TO-236AB	TSMT3
Product Status	Obsolete	Not For New Designs	Not For New Designs	Active	Obsolete	Active	Active
RoHS Status	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)

Engineering Selection Recommendations

Primary Recommendation: RUR040N02TL (Rohm Semiconductor)

The RUR040N02TL is the preferred substitute for the DMN2104L-7. This device meets all mandatory compatibility criteria with an Active product status, ensuring long-term availability and supply chain stability. The RUR040N02TL delivers 4A continuous drain current, matching the original specification, with superior on-resistance performance (35 mOhm vs. 53 mOhm). The device maintains the required 20V Vdss rating and operates across the full -55°C to 150°C temperature range. ROHS3 compliance and MSL 1 rating confirm environmental and handling compatibility. The TSMT3 package is mechanically compatible with SOT-23-3 footprints in surface mount applications.

Secondary Recommendation: PMV65UNER (Nexperia USA Inc.)

The PMV65UNER provides an Active status alternative with 2.8A continuous drain current and 20V Vdss rating. While the current rating falls below the original 4.3A specification, this device is suitable for applications where the actual load current does not exceed 2.8A. The PMV65UNER exhibits superior on-resistance (73 mOhm) and reduced power dissipation (490 mW), making it appropriate for lower-power switching circuits. Full temperature range support (-55°C to 150°C) and ROHS3 compliance ensure regulatory alignment.

Tertiary Recommendation: DMG3420U-7 (Diodes Incorporated)

The DMG3420U-7 is a direct manufacturer alternative from Diodes Incorporated with enhanced performance characteristics. This device delivers 5.47A continuous drain current and exhibits the lowest on-resistance (29 mOhm) among all substitutes. The DMG3420U-7 maintains 20V Vdss and full temperature range operation. However, the part carries a "Not For New Designs" status, limiting its suitability for new product development. Existing designs currently using the DMN2104L-7 may transition to this part for performance improvement.

Alternative Consideration: BSS806NEH6327XTSA1 (Infineon Technologies)

The BSS806NEH6327XTSA1 is an Active status device with automotive-grade qualification (AEC-Q101). This HEXFET® technology MOSFET provides 2.3A continuous drain current and 20V Vdss. The lower current rating restricts this part to applications with reduced load requirements. The automotive qualification and Active status provide supply assurance for regulated applications. The PG-SOT23 package maintains mechanical compatibility with standard SOT-23-3 footprints.

Not Recommended: AO3414 and CPH3456-TL-W

The AO3414 (Alpha & Omega Semiconductor) and CPH3456-TL-W (onsemi) carry "Not For New Designs" or "Obsolete" status classifications. While both devices meet electrical compatibility criteria, their discontinued or restricted status introduces supply chain risk and limits long-term availability. These parts are suitable only for legacy design maintenance where no alternative exists.

Frequently Asked Questions (FAQ)

Q: Can the DMG3420U-7 directly replace the DMN2104L-7 in existing designs?

A: Yes. The DMG3420U-7 maintains identical voltage ratings (20V Vdss), operates across the same temperature range (-55°C to 150°C), and is packaged in the same SOT-23-3 footprint. The higher current rating (5.47A vs. 4.3A) and lower on-resistance (29 mOhm vs. 53 mOhm) provide performance improvement without compatibility issues. However, verify that the gate drive voltage (1.8V to 10V) is compatible with existing driver circuits.

Q: What is the primary limitation of the PMV65UNER as a substitute?

A: The PMV65UNER is rated for 2.8A continuous drain current, which is 65% of the DMN2104L-7 specification (4.3A). This device is suitable only for applications where the actual load current does not exceed 2.8A. Thermal management and circuit current requirements must be re-evaluated before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the environmental and handling requirements of the original DMN2104L-7.

Q: Why is the RUR040N02TL recommended over the DMG3420U-7?

A: The RUR040N02TL carries an Active product status, ensuring ongoing manufacturer support and supply availability. The DMG3420U-7 is classified as "Not For New Designs," which restricts its use in new product development and may introduce future supply constraints. For new designs, the RUR040N02TL is the preferred choice.

Q: Can the BSS806NEH6327XTSA1 be used in automotive applications?

A: Yes. The BSS806NEH6327XTSA1 is qualified to AEC-Q101 automotive standards and carries Active product status. However, the 2.3A current rating is significantly lower than the original 4.3A specification. Automotive applications must verify that load current requirements do not exceed 2.3A before substitution.

Q: What package compatibility considerations apply to these substitutes?

A: All substitute parts are surface mount devices compatible with SOT-23-3 or equivalent footprints (PG-SOT23, 3-CPH, TO-236AB, TSMT3). PCB layout and thermal management may require minor adjustments due to variations in package thermal characteristics and pin configuration. Verify footprint compatibility with design documentation before implementation.

Q: Is gate charge (Qg) a critical parameter for substitution?

A: Gate charge is not a mandatory substitution criterion for the DMN2104L-7. However, variations in Qg (ranging from 1.7 nC to 8 nC among substitutes) may affect switching speed and driver circuit performance. Applications with high-frequency switching or tight timing requirements should evaluate gate charge specifications against driver capabilities.

Q: Can the AO3414 be used as a cost-effective alternative?

A: The AO3414 meets electrical compatibility requirements with 3A continuous drain current and 20V Vdss. However, the "Not For New Designs" status and lower current rating (70% of original specification) limit its applicability. This part is suitable only for legacy design maintenance where supply of the original part is exhausted.

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