AOB482L N-Channel 80V 11A/105A MOSFET TO-263 Equivalent & Substitute Parts

Part Overview

The AOB482L is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 80V drain-to-source voltage with continuous drain current of 11A at Ta and 105A at Tc in a Surface Mount TO-263 (D2PAK) package. This device is classified as Obsolete product status. Due to obsolescence, equivalent and substitute parts from active manufacturers are necessary to maintain design continuity and ensure long-term component availability for new production and field replacements.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	80	V
Continuous Drain Current @ 25°C (Ta)	11	A
Continuous Drain Current @ 25°C (Tc)	105	A
RDS(on) Max @ 20A, 10V	6.9	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	3.7	V
Gate Charge (Qg) @ 10V	81	nC
Input Capacitance (Ciss) @ 40V	4870	pF
Power Dissipation (Tc)	333	W
Operating Temperature Range	-55 to 175	°C
Package Type	TO-263 (D2PAK)	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the AOB482L is determined by the following critical parameters:

Voltage Rating Compatibility: All substitute parts must maintain the 80V Vdss rating or higher to ensure safe operation within the original circuit design envelope.

Current Handling Capability: Substitute parts must support continuous drain current at Tc of at least 105A to match or exceed the thermal performance of the original device.

Package Compatibility: All substitutes must use the TO-263 (D2PAK) Surface Mount package to ensure mechanical and electrical compatibility with existing PCB layouts.

Operating Temperature Range: All substitutes must support the -55°C to 175°C operating temperature range.

RDS(on) Characteristics: Substitute parts should maintain comparable on-resistance values to preserve circuit efficiency and thermal performance.

The substitute parts are grouped into two categories based on voltage rating alignment:

Category 1 (80V Rated): AOB286L, IPB054N08N3GATMA1, PSMN008-75B,118, PSMN5R0-80BS,118, and PSMN6R5-80BS,118 maintain the 80V Vdss specification.

Category 2 (100V Rated): IXFA180N10T2 and IXTA180N10T provide higher voltage margin at 100V Vdss, suitable for applications requiring additional voltage headroom.

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ Tc (A)	RDS(on) Max (mOhm)	Vgs(th) (V)	Qg @ 10V (nC)	Power Dissipation Tc (W)	Product Status
AOB482L	Alpha & Omega	80	105	6.9	3.7	81	333	Obsolete
AOB286L	Alpha & Omega	80	70	5.7	3.3	63	167	Active
IPB054N08N3GATMA1	Infineon	80	80	5.4	3.5	69	150	Active
IXFA180N10T2	IXYS	100	180	6.0	4.0	185	480	Active
IXTA180N10T	IXYS	100	180	6.4	4.5	151	480	Active
PSMN008-75B,118	Nexperia	75	75	8.5	4.0	122.8	230	Active
PSMN5R0-80BS,118	Nexperia	80	100	5.1	4.0	101	270	Active
PSMN6R5-80BS,118	Nexperia	80	100	6.9	4.0	71	210	Active

Engineering Selection Recommendations

Primary Recommendation for Direct Replacement: PSMN6R5-80BS,118 (Nexperia) provides the closest electrical match to the AOB482L with identical 80V Vdss rating, matching RDS(on) of 6.9 mOhm, and 100A continuous drain current at Tc. This part maintains the same TO-263 (D2PAK) package and is RoHS3 Compliant with Active product status, ensuring long-term availability.

Alternative for Enhanced Performance: PSMN5R0-80BS,118 (Nexperia) offers improved on-resistance of 5.1 mOhm at 80V Vdss with 100A continuous drain current, providing superior thermal efficiency while maintaining package compatibility and Active product status.

Higher Current Capability Option: IPB054N08N3GATMA1 (Infineon OptiMOS™ series) delivers 80A continuous drain current at Tc with lower RDS(on) of 5.4 mOhm and Active product status. This part is suitable for applications requiring improved efficiency within the 80V voltage class.

Extended Voltage Margin Option: IXFA180N10T2 and IXTA180N10T (IXYS) provide 100V Vdss rating with significantly higher current capability of 180A at Tc. These parts are appropriate for designs requiring additional voltage headroom or higher current handling, with Active product status and RoHS3 compliance.

Not Recommended: PSMN008-75B,118 operates at 75V Vdss, which is below the 80V specification of the AOB482L and does not provide adequate voltage margin for direct substitution.

All recommended substitutes maintain the -55°C to 175°C operating temperature range, Surface Mount TO-263 (D2PAK) package configuration, and REACH Unaffected compliance status of the original device.

Frequently Asked Questions (FAQ)

Q: Can the AOB286L directly replace the AOB482L?

A: The AOB286L shares the same 80V Vdss rating and TO-263 package but provides only 70A continuous drain current at Tc compared to the AOB482L's 105A. Direct replacement is limited to applications where 70A current capacity is sufficient. The AOB286L offers improved RDS(on) of 5.7 mOhm and lower gate charge, making it suitable for lower-current designs.

Q: What is the difference between the IXFA180N10T2 and IXTA180N10T?

A: Both devices are rated for 100V Vdss and 180A continuous drain current at Tc in the TO-263 package. The IXFA180N10T2 has lower RDS(on) of 6.0 mOhm and higher gate charge of 185 nC, while the IXTA180N10T has RDS(on) of 6.4 mOhm and gate charge of 151 nC. The IXTA180N10T supports higher gate voltage (±30V vs ±20V), providing greater gate drive flexibility.

Q: Why is PSMN008-75B,118 not recommended as a substitute?

A: The PSMN008-75B,118 is rated for 75V Vdss, which is 5V below the AOB482L's 80V specification. This voltage reduction does not provide adequate safety margin for circuits designed for 80V operation and may result in device failure under normal operating conditions.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts (AOB286L, IPB054N08N3GATMA1, IXFA180N10T2, IXTA180N10T, PSMN5R0-80BS,118, and PSMN6R5-80BS,118) are RoHS3 Compliant. The AOB482L does not specify RoHS status, but all active substitutes meet current environmental compliance requirements.

Q: Can I use a 100V-rated MOSFET in place of an 80V device?

A: Yes. Higher voltage-rated devices such as IXFA180N10T2 and IXTA180N10T (100V Vdss) are electrically compatible with 80V circuit designs. The higher voltage rating provides additional safety margin. However, verify that the higher gate charge and input capacitance do not negatively impact gate drive circuit performance or switching speed requirements.

Q: What is the significance of RDS(on) matching in substitution?

A: RDS(on) directly affects power dissipation and thermal performance. Lower RDS(on) values reduce heat generation and improve efficiency. The AOB482L specifies 6.9 mOhm at 20A, 10V. Substitutes with lower RDS(on) (such as PSMN5R0-80BS,118 at 5.1 mOhm) improve thermal performance, while higher values increase power loss and may require thermal management adjustments.

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

A: All substitute parts use the TO-263 (D2PAK) Surface Mount package, ensuring mechanical compatibility with existing PCB layouts. Packaging options (Cut Tape, Tape & Reel, or Tube) vary by part number and supplier, but the physical package footprint remains identical across all substitutes.

Q: What is the impact of gate charge differences on circuit design?

A: Gate charge (Qg) determines the energy required to switch the MOSFET on and off. The AOB482L specifies 81 nC at 10V. Substitutes with lower gate charge (such as AOB286L at 63 nC) require less gate drive energy and switch faster, while higher values (such as IXFA180N10T2 at 185 nC) require more robust gate drive circuits. Verify gate drive capability when selecting substitutes with significantly different gate charge values.

Q: Can I substitute based on current rating alone?

A: No. Current rating is one of several critical parameters. Voltage rating (Vdss), on-resistance (RDS(on)), package type, and operating temperature range must all be verified. A device with higher current rating but lower voltage rating or incompatible package is not a valid substitute.

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