AON7430 N-Channel MOSFET 30V 13A/34A Equivalent & Substitute Parts

Part Overview

The AON7430 is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 30V drain-to-source voltage with continuous drain current of 13A (Ta) and 34A (Tc). The device is housed in an 8-DFN-EP (3x3) surface mount package and is classified as "Not For New Designs," indicating it has been superseded or is in end-of-life status. This classification necessitates identification of equivalent and substitute components for ongoing production support, maintenance applications, and legacy system repairs.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	30	V
Continuous Drain Current @ 25°C (Ta)	13	A
Continuous Drain Current @ 25°C (Tc)	34	A
RDS(on) Max @ 20A, 10V	12	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	2.5	V
Gate Charge (Qg) @ 10V	17	nC
Input Capacitance (Ciss) @ 15V	910	pF
Power Dissipation (Ta)	3.1	W
Power Dissipation (Tc)	23	W
Operating Temperature Range	-55 to 150	°C
Package Type	8-DFN-EP (3x3)	Surface Mount
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the AON7430 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 30V
Continuous Drain Current (Id): Must support minimum 13A at Ta or equivalent thermal conditions
Gate Threshold Voltage (Vgs(th)): Must fall within compatible range (2.2V to 2.5V @ 250µA)
RDS(on) Max: Must not exceed 15.2 mOhm to maintain comparable on-state performance
Operating Temperature Range: Must support -55°C to 150°C (TJ)
Package Type: Surface mount 8-pin configurations (8-DFN-EP, 8-HSMT, PowerDI3333-8)
Compliance: RoHS3 compliant, MSL 1 (Unlimited)

Secondary Compatibility Factors:

Gate Charge (Qg): Lower values preferred for faster switching
Input Capacitance (Ciss): Lower values reduce gate drive requirements
Power Dissipation: Must accommodate thermal design constraints

Substitute parts are grouped into two categories: Direct Equivalents (matching or exceeding all primary parameters) and Functional Alternatives (meeting core electrical requirements with acceptable trade-offs in current rating or package footprint).

Parameter Comparison

Parameter	AON7430	AONR36326C	DMS3014SFG-7	DMS3014SFGQ-7	RQ3E080BNTB	RQ3E100MNTB1
Manufacturer	Alpha & Omega	Alpha & Omega	Diodes Inc.	Diodes Inc.	Rohm	Rohm
Vdss (V)	30	30	30	30	30	30
Id @ Ta (A)	13	12	9.5	9.5	8	10
RDS(on) Max (mOhm)	12 @ 20A, 10V	9.8 @ 12A, 10V	13 @ 10.4A, 10V	14.5 @ 10.4A, 10V	15.2 @ 8A, 10V	12.3 @ 10A, 10V
Vgs(th) @ 250µA (V)	2.5	2.3	2.2	2.2	2.5	2.5
Qg @ 10V (nC)	17	15	45.7	19.3	14.5	9.9
Ciss @ 15V (pF)	910	540	4310	4310	660	520
Power Dissipation Ta (W)	3.1	3.1	1	1	2	2
Operating Temp (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 150	to 150	to 150
Package	8-DFN-EP (3x3)	8-DFN-EP (3x3)	PowerDI3333-8	PowerDI3333-8	8-HSMT (3.2x3)	8-HSMT (3.2x3)
Product Status	Not For New Designs	Active	Active	Active	Active	Not For New Designs
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

AONR36326C (Alpha & Omega Semiconductor Inc.)

The AONR36326C is the primary equivalent substitute for the AON7430. Both devices share identical package geometry (8-DFN-EP 3x3), voltage rating (30V), and thermal specifications. The AONR36326C maintains comparable RDS(on) performance (9.8 mOhm vs. 12 mOhm) and lower gate charge (15 nC vs. 17 nC), resulting in improved switching efficiency. The primary trade-off is reduced continuous drain current (12A Ta vs. 13A Ta); however, this remains within acceptable margins for most applications. The AONR36326C carries Active product status and is RoHS3 compliant with unlimited moisture sensitivity level. This part is recommended for direct replacement in new production and legacy system support.

RQ3E100MNTB1 (Rohm Semiconductor)

The RQ3E100MNTB1 provides functional equivalence with 10A continuous drain current and 12.3 mOhm RDS(on), meeting or exceeding the AON7430 performance envelope. The device features the lowest gate charge (9.9 nC) among all substitutes, enabling faster switching transitions. Package footprint differs slightly (8-HSMT 3.2x3 vs. 8-DFN-EP 3x3), requiring PCB layout verification. The RQ3E100MNTB1 is classified as "Not For New Designs," limiting its suitability for new product development but remaining acceptable for legacy system maintenance. RoHS3 compliance and unlimited MSL are maintained.

DMS3014SFGQ-7 (Diodes Incorporated)

The DMS3014SFGQ-7 is an automotive-qualified alternative (AEC-Q101) rated for 9.5A continuous drain current with 14.5 mOhm RDS(on). This device features the lowest input capacitance (4310 pF) among substitutes and carries Active product status. The PowerDI3333-8 package differs from the original 8-DFN-EP footprint, necessitating PCB redesign. Gate charge of 19.3 nC is slightly elevated compared to the AON7430. This part is suitable for applications requiring automotive qualification and ongoing production support.

RQ3E080BNTB (Rohm Semiconductor)

The RQ3E080BNTB provides functional substitution with 8A continuous drain current and 15.2 mOhm RDS(on). The 8-HSMT package requires PCB layout modification. This device is recommended only when current rating reduction is acceptable and package footprint compatibility can be accommodated. Active product status and RoHS3 compliance are maintained.

DMS3014SFG-7 (Diodes Incorporated)

The DMS3014SFG-7 is functionally equivalent to DMS3014SFGQ-7 without automotive qualification. It provides 9.5A continuous drain current and 13 mOhm RDS(on) with Active product status. The elevated gate charge (45.7 nC) and input capacitance (4310 pF) result in increased gate drive requirements compared to the AON7430. This part is suitable for non-automotive applications requiring active production support.

Frequently Asked Questions (FAQ)

Q: Can the AONR36326C directly replace the AON7430 without PCB modification?

A: Yes. Both devices utilize identical 8-DFN-EP (3x3) surface mount packages with matching pin configurations and thermal pad geometry. No PCB layout changes are required for direct substitution.

Q: What is the impact of the 1A reduction in continuous drain current when using AONR36326C?

A: The AONR36326C is rated for 12A (Ta) versus the AON7430's 13A (Ta). This represents a 7.7% reduction in continuous current capacity. Applications operating below 12A experience no functional impact. Systems designed to operate at or above 13A require thermal analysis to confirm adequate margin with the substitute device.

Q: Why do the Rohm devices (RQ3E100MNTB1, RQ3E080BNTB) have different package footprints?

A: Rohm utilizes the 8-HSMT (3.2x3) package format, which differs from the Alpha & Omega 8-DFN-EP (3x3) package. While both are 8-pin surface mount packages, the physical dimensions and pad layouts are incompatible. PCB redesign is required for substitution with Rohm devices.

Q: Are the Diodes Incorporated DMS3014 variants suitable for high-frequency switching applications?

A: The DMS3014SFG-7 exhibits elevated gate charge (45.7 nC) and input capacitance (4310 pF) compared to the AON7430 (17 nC, 910 pF). These characteristics increase gate drive power requirements and may limit switching frequency in current-limited gate drive circuits. The DMS3014SFGQ-7 variant features reduced gate charge (19.3 nC), providing improved high-frequency performance.

Q: Which substitute part is recommended for new product designs?

A: The AONR36326C is the recommended choice for new designs. It maintains Active product status, identical package geometry, and superior electrical characteristics compared to the obsolete AON7430. All other substitutes either carry "Not For New Designs" status or require PCB layout modifications.

Q: What compliance certifications are maintained across all substitute parts?

A: All substitute parts maintain RoHS3 compliance and unlimited moisture sensitivity level (MSL 1). The DMS3014SFGQ-7 additionally carries AEC-Q101 automotive qualification. All parts are classified as REACH Unaffected and carry EAR99 export classification.

Q: Can RQ3E100MNTB1 be used in applications requiring continuous operation at 13A?

A: The RQ3E100MNTB1 is rated for 10A continuous drain current (Ta). Operation at 13A exceeds the device rating and requires thermal analysis to confirm junction temperature remains within the -55°C to 150°C operating range. This configuration is not recommended without explicit thermal validation.

Q: What is the significance of the "Not For New Designs" status on AON7430 and RQ3E100MNTB1?

A: "Not For New Designs" indicates the manufacturer has discontinued active development and recommends alternative parts for new product development. These devices remain available for legacy system support and maintenance but should not be selected for new designs. The AONR36326C is the manufacturer-recommended replacement for the AON7430.

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