AOD4182 N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The AOD4182 is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 80V drain-to-source voltage with 8.5A continuous drain current at 25°C (Ta) and 53A at case temperature (Tc). The device is housed in a TO-252 (DPAK) surface mount package and is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active product lines are necessary for new designs and ongoing production requirements. Substitute devices maintain electrical compatibility within specified parameter ranges while offering active product support and availability.

Key Parameters

Parameter	AOD4182 Value	Unit
FET Type	N-Channel	—
Technology	MOSFET (Metal Oxide)	—
Drain-to-Source Voltage (Vdss)	80	V
Continuous Drain Current @ 25°C (Ta)	8.5	A
Continuous Drain Current @ Case (Tc)	53	A
Rds(on) Max @ 20A, 10V	15.5	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	4.2	V
Gate Charge (Qg) @ 10V	34	nC
Input Capacitance (Ciss) @ 40V	2005	pF
Power Dissipation (Ta)	2.5	W
Power Dissipation (Tc)	100	W
Operating Temperature Range	−55 to 175	°C
Mounting Type	Surface Mount	—
Package	TO-252-3 (DPAK)	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the AOD4182 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

FET Type: N-Channel
Technology: MOSFET (Metal Oxide)
Package: TO-252-3 (DPAK) surface mount
Drain-to-Source Voltage (Vdss): Equal to or greater than 80V
Continuous Drain Current (Tc): Equal to or greater than 53A
Rds(on) @ 10V: Within acceptable range for switching performance
Operating Temperature Range: Minimum −55°C to 175°C

Substitution Logic:

Substitute parts are grouped into two categories based on voltage rating:

Category 1 – 80V Rated Devices (Direct Voltage Match):

AOD2816 (Alpha & Omega Semiconductor Inc.): 80V, 35A (Tc), active product status
IPD50N08S413ATMA1 (Infineon Technologies): 80V, 50A (Tc), OptiMOS™ series, AEC-Q101 automotive qualified

Category 2 – 100V Rated Devices (Higher Voltage Rating):

DMT10H015LK3-13 (Diodes Incorporated): 100V, 50A (Tc), AEC-Q101 automotive qualified
IPD50N10S3L16ATMA1 (Infineon Technologies): 100V, 50A (Tc), OptiMOS™ series
IPD60N10S4L12ATMA1 (Infineon Technologies): 100V, 60A (Tc), HEXFET® series, AEC-Q101 automotive qualified
SQD70140EL_GE3 (Vishay Siliconix): 100V, 30A (Tc), TrenchFET® series, AEC-Q101 automotive qualified

Category 3 – Lower Voltage Devices (Restricted Application):

STD35NF06LT4 (STMicroelectronics): 60V, 35A (Tc), STripFET™ II series (suitable only for applications with maximum operating voltage ≤60V)

All substitute parts maintain TO-252-3 (DPAK) package compatibility, surface mount configuration, and MSL 1 moisture sensitivity rating. Devices rated at 100V provide design margin for applications operating near the 80V limit of the AOD4182.

Parameter Comparison

Parameter	AOD4182	AOD2816	DMT10H015LK3-13	IPD50N08S413ATMA1	IPD50N10S3L16ATMA1	IPD60N10S4L12ATMA1	SQD70140EL_GE3	STD35NF06LT4
Manufacturer	Alpha & Omega	Alpha & Omega	Diodes Inc.	Infineon	Infineon	Infineon	Vishay	STMicro
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
Vdss (V)	80	80	100	80	100	100	100	60
Id @ Tc (A)	53	35	50	50	50	60	30	35
Rds(on) @ 10V (mOhm)	15.5	15	15	13.2	15	12	15	17
Vgs(th) (V)	4.2	3.5	3.5	4	2.4	2.1	2.5	2.5
Qg @ 10V (nC)	34	22	33.3	30	64	49	40	33
Ciss @ Vds (pF)	2005 @ 40V	1109 @ 40V	1871 @ 50V	1711 @ 25V	4180 @ 25V	3170 @ 25V	2100 @ 25V	1700 @ 25V
Power Dissipation Tc (W)	100	53.5	2.9	72	100	94	71	80
Operating Temp Range (°C)	−55 to 175	−55 to 175	−55 to 150	−55 to 175	−55 to 175	−55 to 175	−55 to 175	−55 to 175
Package	TO-252-3	TO-252-3	TO-252-3	TO-252-3	TO-252-3	TO-252-3	TO-252-3	TO-252-3
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
AEC-Q101 Automotive	—	—	Yes	Yes	—	Yes	Yes	—

Engineering Selection Recommendations

For Direct 80V Replacement with Active Product Support:

AOD2816 is the manufacturer-recommended direct substitute from Alpha & Omega Semiconductor Inc. It maintains the same 80V voltage rating and TO-252-3 package. The device is active and ROHS3 compliant. Continuous drain current at case temperature is 35A, which is lower than the AOD4182's 53A rating. This device is suitable for applications where the 35A (Tc) rating is sufficient.

IPD50N08S413ATMA1 (Infineon OptiMOS™) provides 80V, 50A (Tc) performance with AEC-Q101 automotive qualification. This device approaches the original 53A (Tc) specification and is suitable for automotive and industrial applications requiring qualification documentation.

For Higher Voltage Margin (100V Rated):

DMT10H015LK3-13 (Diodes Incorporated) offers 100V, 50A (Tc) with AEC-Q101 automotive qualification and active product status. The higher voltage rating provides design margin for transient overvoltage conditions. Operating temperature range is −55°C to 150°C, which is 25°C lower than the AOD4182 maximum.

IPD50N10S3L16ATMA1 (Infineon OptiMOS™) provides 100V, 50A (Tc) with full −55°C to 175°C operating range. Power dissipation at case temperature matches the AOD4182 at 100W. This device is suitable for applications requiring maximum thermal performance and temperature range.

IPD60N10S4L12ATMA1 (Infineon HEXFET®) offers 100V, 60A (Tc) with AEC-Q101 automotive qualification, exceeding the original 53A specification. This device provides the highest current capability and is suitable for high-current switching applications.

SQD70140EL_GE3 (Vishay TrenchFET®) provides 100V, 30A (Tc) with AEC-Q101 automotive qualification. This device is suitable for lower-current applications where the 30A (Tc) rating is acceptable.

For Voltage-Constrained Applications (≤60V Maximum):

STD35NF06LT4 (STMicroelectronics STripFET™ II) is rated for 60V, 35A (Tc) and is suitable only for applications with maximum operating voltage not exceeding 60V. This device is not recommended as a general substitute for the 80V-rated AOD4182.

Compliance and Availability:

All active substitute devices are ROHS3 compliant. Devices with AEC-Q101 automotive qualification (DMT10H015LK3-13, IPD50N08S413ATMA1, IPD60N10S4L12ATMA1, SQD70140EL_GE3) are suitable for automotive applications. Current inventory levels range from 2,800 to 14,336 units across all substitute options.

Frequently Asked Questions (FAQ)

Q: Can the AOD2816 directly replace the AOD4182 in all applications?

A: The AOD2816 maintains the same 80V voltage rating and TO-252-3 package as the AOD4182. However, the continuous drain current at case temperature is 35A compared to the AOD4182's 53A. The AOD2816 is suitable for applications where the 35A (Tc) rating meets design requirements. Applications requiring the full 53A capability must use higher-current alternatives such as IPD50N08S413ATMA1, DMT10H015LK3-13, or IPD60N10S4L12ATMA1.

Q: What is the advantage of selecting a 100V-rated device over an 80V-rated substitute?

A: 100V-rated devices provide design margin for transient overvoltage conditions and voltage spikes that may exceed the nominal 80V operating point. This is particularly important in switching applications with inductive loads. However, 100V devices typically have higher input capacitance and gate charge, which may affect switching speed and gate drive requirements. Selection depends on the specific application voltage profile and thermal constraints.

Q: Are all substitute parts compatible with the original AOD4182 PCB layout?

A: All substitute parts listed use the TO-252-3 (DPAK) package with identical pin configuration and footprint. PCB layout compatibility is maintained. However, thermal performance may differ due to variations in power dissipation ratings. Thermal pad design and copper area should be verified against the specific substitute device's power dissipation requirements.

Q: Which substitute is recommended for automotive applications?

A: Devices with AEC-Q101 automotive qualification are DMT10H015LK3-13, IPD50N08S413ATMA1, IPD60N10S4L12ATMA1, and SQD70140EL_GE3. Among these, IPD60N10S4L12ATMA1 offers the highest current rating (60A at Tc) and full operating temperature range (−55°C to 175°C). IPD50N08S413ATMA1 provides a direct 80V match with 50A capability. Selection depends on current requirements and thermal design constraints.

Q: What is the impact of different gate threshold voltages on circuit performance?

A: Gate threshold voltage (Vgs(th)) determines the minimum gate-source voltage required to turn the device on. The AOD4182 has Vgs(th) of 4.2V, while substitutes range from 2.1V to 4.0V. Lower threshold voltages allow operation with lower gate drive voltages, reducing gate driver power consumption. Higher threshold voltages provide better noise immunity in noisy environments. Gate drive circuit design must accommodate the specific Vgs(th) of the selected device.

Q: How does gate charge affect switching frequency capability?

A: Gate charge (Qg) determines the total charge that must be supplied to turn the device on or off. Higher gate charge requires more gate drive current or longer switching times. The AOD4182 has Qg of 34 nC at 10V. Substitutes range from 22 nC to 64 nC. Devices with lower gate charge (AOD2816 at 22 nC, DMT10H015LK3-13 at 33.3 nC) enable faster switching and lower gate drive losses. Devices with higher gate charge (IPD50N10S3L16ATMA1 at 64 nC) require more robust gate drive circuits.

Q: Is the AOD4182 still available for new designs?

A: The AOD4182 is classified as obsolete and is not recommended for new designs. Active substitute products from Alpha & Omega Semiconductor Inc. (AOD2816), Infineon Technologies (IPD50N08S413ATMA1, IPD50N10S3L16ATMA1, IPD60N10S4L12ATMA1), Diodes Incorporated (DMT10H015LK3-13), Vishay Siliconix (SQD70140EL_GE3), and STMicroelectronics (STD35NF06LT4) provide ongoing product support, availability, and compliance with current regulatory standards.

Q: What is the difference between Ta and Tc current ratings?

A: Ta (ambient temperature) current rating is measured at 25°C ambient temperature without active cooling. Tc (case temperature) current rating is measured at a specified case temperature, typically higher than ambient, and represents the device's capability with proper thermal management. The AOD4182 is rated for 8.5A at Ta and 53A at Tc. The large difference indicates that thermal management is critical for achieving full current capability. Substitute devices should be selected based on Tc ratings for applications requiring continuous high current operation.

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