DMC3018LSD-13 Equivalent & Substitute Parts

Part Overview

The DMC3018LSD-13 is an N and P-Channel MOSFET array manufactured by Diodes Incorporated, designed for surface mount applications in 8-SO packaging. This device features logic level gate operation with a 30V drain-to-source voltage rating and delivers 9.1A (N-channel) and 6A (P-channel) continuous drain current at 25°C. The part is rated for 2.5W maximum power dissipation and operates across the temperature range of -55°C to 150°C.

The DMC3018LSD-13 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this component.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	30V	V
Continuous Drain Current (Id) @ 25°C - N-Channel	9.1A	A
Continuous Drain Current (Id) @ 25°C - P-Channel	6A	A
Rds On (Max) @ Id, Vgs	20mOhm @ 6.9A, 10V	mOhm
Vgs(th) (Max) @ Id	2.1V @ 250µA	V
Gate Charge (Qg) (Max) @ Vgs	12.4nC @ 10V	nC
Input Capacitance (Ciss) (Max) @ Vds	631pF @ 15V	pF
Power - Max	2.5W	W
Operating Temperature Range	-55°C to 150°C	°C
Configuration	N and P-Channel	—
FET Feature	Logic Level Gate	—
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the DMC3018LSD-13 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Drain to Source Voltage (Vdss): Must equal or exceed 30V
Configuration: Must be N and P-Channel MOSFET array
FET Feature: Must support Logic Level Gate operation
Operating Temperature Range: Must span -55°C to 150°C minimum
Package / Case: Must be 8-SOIC (0.154", 3.90mm Width) or equivalent 8-SO footprint

Performance Considerations:

Continuous Drain Current (Id): Substitute must meet or exceed the required current ratings (9.1A N-channel, 6A P-channel) for the intended application
Rds On (Max): Lower on-resistance values indicate improved performance but are not required for substitution
Power Dissipation: Maximum power rating of 2.5W or higher ensures thermal compatibility
Gate Charge and Input Capacitance: These parameters affect switching characteristics and circuit performance

Compliance and Availability:

RoHS3 Compliance: All substitutes must maintain regulatory compliance
Moisture Sensitivity Level: MSL 1 (Unlimited) ensures handling compatibility
Product Status: Active status substitutes are preferred for long-term supply assurance

Parameter Comparison

Parameter	DMC3018LSD-13	DMC3021LSD-13	AO4627	FDS8858CZ	IRF7389TRPBF	SI4505DY-T1-GE3
Manufacturer	Diodes Inc.	Diodes Inc.	Alpha & Omega	onsemi	Infineon	Vishay
Vdss (V)	30	30	30	30	30	30
Id N-Channel (A)	9.1	8.5	4.5	8.6	—	6
Id P-Channel (A)	6	7	3.5	7.3	—	3.8
Rds On (Max) (mOhm)	20 @ 6.9A, 10V	21 @ 7A, 10V	50 @ 4.5A, 10V	17 @ 8.6A, 10V	29 @ 5.8A, 10V	18 @ 7.8A, 10V
Vgs(th) (Max) (V)	2.1 @ 250µA	2.1 @ 250µA	2.5 @ 250µA	3 @ 250µA	1 @ 250µA	1.8 @ 250µA
Gate Charge (Qg) (nC)	12.4 @ 10V	16.1 @ 10V	5 @ 10V	24 @ 10V	33 @ 10V	20 @ 5V
Input Capacitance (Ciss) (pF)	631 @ 15V	767 @ 10V	210 @ 15V	1205 @ 15V	650 @ 25V	— @ —
Power - Max (W)	2.5	2.5	2	0.9	2.5	1.2
Operating Temperature (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	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)

Engineering Selection Recommendations

Primary Substitute: DMC3021LSD-13

The DMC3021LSD-13 is the manufacturer-recommended substitute from Diodes Incorporated. This part maintains electrical and mechanical compatibility with the DMC3018LSD-13 while offering active product status. The DMC3021LSD-13 delivers 8.5A (N-channel) and 7A (P-channel) continuous drain current, meeting or exceeding the performance envelope of the obsolete part. Both devices share identical 30V Vdss rating, 8-SOIC package footprint, logic level gate operation, and -55°C to 150°C operating temperature range. The DMC3021LSD-13 carries ROHS3 compliance and MSL 1 rating, ensuring regulatory and handling compatibility. This substitute is recommended as the first choice for direct replacement applications.

Secondary Substitute: FDS8858CZ

The FDS8858CZ from onsemi (PowerTrench® series) provides electrical compatibility with 30V Vdss, 8.6A (N-channel) and 7.3A (P-channel) continuous drain current, and 8-SOIC package footprint. This part features superior on-resistance performance (17mOhm) and operates across the required temperature range. However, the FDS8858CZ has a reduced maximum power rating of 900mW compared to the 2.5W specification of the DMC3018LSD-13. This substitute is suitable for applications where thermal dissipation is not a limiting factor and where the improved on-resistance characteristics provide circuit benefits.

Tertiary Substitute: IRF7389TRPBF

The IRF7389TRPBF from Infineon (HEXFET® series) maintains 30V Vdss rating, 8-SOIC package footprint, logic level gate operation, and -55°C to 150°C temperature range. This part is rated for 2.5W maximum power dissipation, matching the original specification. The IRF7389TRPBF features a lower gate threshold voltage (1V) compared to the DMC3018LSD-13 (2.1V), which may affect circuit switching characteristics. Continuous drain current specifications are not provided in the available data. This substitute is suitable for applications where Infineon component qualification is required.

Alternative Substitute: AO4627

The AO4627 from Alpha & Omega Semiconductor maintains 30V Vdss rating, 8-SOIC package footprint, and logic level gate operation. However, this part delivers only 4.5A (N-channel) and 3.5A (P-channel) continuous drain current, representing a significant reduction from the DMC3018LSD-13 specification. The AO4627 is suitable only for applications with reduced current requirements or where the lower current rating is acceptable for the circuit design.

Alternative Substitute: SI4505DY-T1-GE3

The SI4505DY-T1-GE3 from Vishay Siliconix (TrenchFET® series) provides 30V Vdss rating, 8-SOIC package footprint, and logic level gate operation. This part delivers 6A (N-channel) and 3.8A (P-channel) continuous drain current with a maximum power rating of 1.2W. The reduced power rating and current specifications limit this substitute to applications with lower power and current demands.

Frequently Asked Questions (FAQ)

Q: Can the DMC3021LSD-13 directly replace the DMC3018LSD-13 in existing designs?

A: The DMC3021LSD-13 is electrically and mechanically compatible with the DMC3018LSD-13. Both devices share identical 30V Vdss rating, 8-SOIC package footprint, logic level gate operation, and -55°C to 150°C operating temperature range. The DMC3021LSD-13 delivers 8.5A (N-channel) and 7A (P-channel) continuous drain current, which meets or exceeds the performance requirements of the original part. Direct substitution is supported without circuit modification.

Q: What is the primary difference between the DMC3018LSD-13 and its substitutes?

A: The DMC3018LSD-13 is classified as obsolete, while all listed substitutes maintain active product status. The key electrical differences among substitutes are continuous drain current ratings, on-resistance characteristics, and maximum power dissipation. All substitutes maintain the critical 30V Vdss rating, 8-SOIC package footprint, and logic level gate operation required for compatibility.

Q: Are all substitute parts available in the same packaging options?

A: All substitute parts are available in 8-SOIC (0.154", 3.90mm Width) surface mount packaging, which is mechanically compatible with the DMC3018LSD-13. Packaging availability (Cut Tape, Digi-Reel, Tape & Reel) varies by manufacturer and supplier. Verify specific packaging requirements with your component supplier.

Q: Which substitute is recommended for high-current applications?

A: The FDS8858CZ delivers the highest continuous drain current ratings at 8.6A (N-channel) and 7.3A (P-channel), exceeding the DMC3018LSD-13 specification. However, the FDS8858CZ has a reduced maximum power rating of 900mW. For applications requiring both high current and high power dissipation, the DMC3021LSD-13 is recommended as it maintains the 2.5W power rating while delivering 8.5A (N-channel) and 7A (P-channel) continuous drain current.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, ensuring regulatory compliance and handling compatibility with the original DMC3018LSD-13.

Q: What is the significance of gate threshold voltage (Vgs(th)) differences among substitutes?

A: Gate threshold voltage affects the gate drive voltage required to turn the MOSFET on. The DMC3018LSD-13 has a Vgs(th) of 2.1V, while substitutes range from 1V (IRF7389TRPBF) to 3V (FDS8858CZ). Lower threshold voltages require less gate drive voltage, while higher values require more. Verify that your gate drive circuit can accommodate the threshold voltage of the selected substitute.

Q: Can the AO4627 be used in applications designed for the DMC3018LSD-13?

A: The AO4627 is electrically compatible in terms of voltage rating and package footprint. However, it delivers only 4.5A (N-channel) and 3.5A (P-channel) continuous drain current, compared to 9.1A and 6A for the DMC3018LSD-13. The AO4627 is suitable only for applications where the reduced current rating does not exceed circuit requirements.

Q: What thermal considerations apply when selecting a substitute?

A: Maximum power dissipation ratings vary among substitutes: DMC3018LSD-13 (2.5W), DMC3021LSD-13 (2.5W), FDS8858CZ (900mW), IRF7389TRPBF (2.5W), AO4627 (2W), and SI4505DY-T1-GE3 (1.2W). Select a substitute with a power rating equal to or greater than the thermal requirements of your application. Lower on-resistance values (Rds On) reduce power dissipation for a given current level.

Q: Is the 8-SOIC package footprint identical across all substitutes?

A: Yes, all substitute parts use the 8-SOIC (0.154", 3.90mm Width) package footprint, which is mechanically and electrically compatible with the DMC3018LSD-13. PCB layout and component placement require no modification for direct substitution.

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