AOB282L N-Channel MOSFET 80V 18.5A/105A TO-263 Equivalent & Substitute Parts

Part Overview

The AOB282L is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 80V drain-to-source voltage with continuous drain current of 18.5A at Ta and 105A at Tc. The device is packaged in TO-263 (D2PAK) surface mount configuration and is currently in active product status with 1979 units in stock.

Substitute parts are identified based on matching electrical characteristics within the allowed parameter ranges for N-Channel MOSFETs in the same package type. Equivalent devices maintain compatibility through identical or superior ratings in voltage, current capacity, and thermal performance while preserving the same mechanical footprint and pin configuration.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	80	V
Continuous Drain Current @ 25°C (Ta)	18.5	A
Continuous Drain Current @ 25°C (Tc)	105	A
Rds(on) Max @ 20A, 10V	3.2	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	3.5	V
Gate Charge (Qg) @ 10V	178	nC
Operating Temperature Range	-55 to 175	°C
Package Type	TO-263 (D2PAK)	Surface Mount
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the AOB282L are selected based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Equal to or greater than 80V
Package Type: TO-263 (D2PAK) surface mount configuration
FET Type: N-Channel MOSFET technology
Operating Temperature Range: -55°C to 175°C (TJ)
Continuous Drain Current: Equal to or greater than 18.5A (Ta) / 105A (Tc)
Rds(on) Performance: Equal to or lower than 3.2mOhm @ specified conditions
Regulatory Compliance: ROHS3 compliant, REACH unaffected

Substitute Parts Identified:

FDB035N10A (onsemi) — 100V, 120A (Tc), PowerTrench® series, Active status
FDB86135 (onsemi) — 100V, 75A (Tc), PowerTrench® series, Active status
FDB86366-F085 (onsemi) — 80V, 110A (Tc), PowerTrench® series, Obsolete status, AEC-Q101 automotive qualified
PSMN2R8-80BS,118 (Nexperia USA Inc.) — 80V, 120A (Tc), Active status

All substitute parts maintain identical package configuration, thermal operating range, and regulatory compliance status with the main part.

Parameter Comparison

Parameter	AOB282L	FDB035N10A	FDB86135	FDB86366-F085	PSMN2R8-80BS,118
Manufacturer	Alpha & Omega Semiconductor Inc.	onsemi	onsemi	onsemi	Nexperia USA Inc.
Vdss (V)	80	100	100	80	80
Id @ Tc (A)	105	120	75	110	120
Rds(on) Max (mOhm)	3.2 @ 20A, 10V	3.5 @ 75A, 10V	3.5 @ 75A, 10V	3.6 @ 80A, 10V	3.0 @ 25A, 10V
Vgs(th) Max (V)	3.5 @ 250µA	4.0 @ 250µA	4.0 @ 250µA	4.0 @ 250µA	4.0 @ 1mA
Gate Charge Qg (nC)	178 @ 10V	116 @ 10V	116 @ 10V	112 @ 10V	139 @ 10V
Ciss Max (pF)	7765 @ 40V	7295 @ 25V	7295 @ 25V	6280 @ 40V	9961 @ 40V
Operating Temperature (°C)	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175
Package	TO-263 (D2PAK)	TO-263 (D2PAK)	TO-263 (D2PAK)	TO-263 (D2PAK)	D2PAK
Product Status	Active	Active	Active	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

FDB035N10A (onsemi PowerTrench®)

This substitute provides the highest continuous drain current rating at 120A (Tc) with elevated voltage rating of 100V. The device is in active product status with 4321 units in stock. Superior gate charge performance (116 nC) and lower Rds(on) at higher current levels support applications requiring enhanced thermal performance. Suitable for designs where voltage margin above 80V is acceptable and current capacity exceeds 105A requirements.

FDB86135 (onsemi PowerTrench®)

This substitute maintains 100V voltage rating with 75A continuous drain current (Tc). Active product status with 1710 units in stock. Rds(on) specification of 3.5 mOhm matches FDB035N10A performance characteristics. Appropriate for applications where current requirements are lower than 105A but voltage margin is desired. Gate charge of 116 nC provides efficient switching performance.

FDB86366-F085 (onsemi PowerTrench®)

This substitute matches the 80V voltage rating with 110A continuous drain current (Tc), providing direct voltage compatibility. Product status is obsolete; however, 1805 units remain in stock. AEC-Q101 automotive qualification and grade designation indicate suitability for automotive applications. Rds(on) of 3.6 mOhm and gate charge of 112 nC are comparable to the main part. Use only when automotive qualification is required and obsolete status is acceptable for the application lifecycle.

PSMN2R8-80BS,118 (Nexperia USA Inc.)

This substitute provides exact 80V voltage matching with superior 120A continuous drain current (Tc) and lowest Rds(on) at 3.0 mOhm @ 25A, 10V. Active product status with highest inventory availability at 52225 units. Gate charge of 139 nC is slightly elevated compared to alternatives. Recommended for applications prioritizing voltage compatibility, current capacity, and on-resistance performance with maximum component availability.

Frequently Asked Questions (FAQ)

Q: Can the AOB282L be directly replaced with FDB035N10A?

A: Yes. FDB035N10A provides superior electrical performance with 100V voltage rating and 120A continuous drain current, exceeding the AOB282L specifications. The TO-263 (D2PAK) package is identical. Verify circuit design does not depend on the 80V voltage limit of the original part.

Q: What is the difference between the substitute parts in terms of voltage rating?

A: FDB035N10A and FDB86135 are rated for 100V, providing 20V additional margin above the AOB282L 80V rating. FDB86366-F085 and PSMN2R8-80BS,118 match the 80V rating exactly. Higher voltage ratings provide design margin but do not affect pin compatibility or package footprint.

Q: Why is FDB86366-F085 marked as obsolete?

A: FDB86366-F085 has reached end-of-life status with onsemi. Although 1805 units remain in stock, this part should be used only when automotive AEC-Q101 qualification is a mandatory requirement and obsolete component status is acceptable for the application. For new designs, select from active status alternatives.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed—FDB035N10A, FDB86135, FDB86366-F085, and PSMN2R8-80BS,118—are ROHS3 compliant and REACH unaffected, matching the regulatory status of the AOB282L.

Q: What is the significance of gate charge (Qg) differences among substitutes?

A: Gate charge affects switching speed and driver circuit requirements. The AOB282L has 178 nC gate charge. Substitutes range from 112 nC (FDB86366-F085) to 139 nC (PSMN2R8-80BS,118). Lower gate charge enables faster switching with reduced driver power dissipation. Verify gate driver capability when selecting parts with significantly different Qg values.

Q: Can I use FDB86135 if my circuit requires 105A continuous current?

A: FDB86135 is rated for 75A continuous drain current (Tc), which is below the 105A requirement of the AOB282L. This part is not suitable for applications requiring the full 105A current capacity. Select FDB035N10A, FDB86366-F085, or PSMN2R8-80BS,118 instead.

Q: Are the D2PAK and TO-263 packages identical?

A: Yes. D2PAK and TO-263 are equivalent designations for the same surface mount package with 2 leads plus tab configuration. All substitute parts use this identical package, ensuring direct PCB footprint compatibility with the AOB282L.

Q: Which substitute has the best on-resistance performance?

A: PSMN2R8-80BS,118 provides the lowest Rds(on) at 3.0 mOhm @ 25A, 10V. This reduces conduction losses and heat dissipation in high-current applications. FDB86366-F085 has the highest Rds(on) at 3.6 mOhm, though still within acceptable range for most applications.

Q: What inventory considerations should guide my selection?

A: PSMN2R8-80BS,118 has the highest stock availability at 52225 units. FDB035N10A has 4321 units, FDB86135 has 1710 units, and FDB86366-F085 has 1805 units. For long-term supply chain stability, PSMN2R8-80BS,118 offers the best availability position.

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