AOB2910L N-Channel 100V 6A MOSFET Equivalent & Substitute Parts

Part Overview

The AOB2910L is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 100V drain-to-source voltage with 6A continuous drain current at 25°C ambient temperature (Ta) and 30A at case temperature (Tc). The device is housed in a TO-263 (D2PAK) surface mount package and is classified as obsolete. Due to its obsolete status, equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production and repair applications. Substitute devices must maintain electrical compatibility across voltage ratings, current handling capacity, thermal characteristics, and package form factor.

Key Parameters

Parameter	AOB2910L Value	Unit
FET Type	N-Channel	—
Drain-to-Source Voltage (Vdss)	100	V
Continuous Drain Current @ 25°C (Ta)	6	A
Continuous Drain Current @ Case (Tc)	30	A
Rds(on) Max @ 20A, 10V	23.5	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	2.7	V
Gate Charge (Qg) @ 10V	25	nC
Input Capacitance (Ciss) @ 50V	1190	pF
Power Dissipation (Ta)	2.1	W
Power Dissipation (Tc)	50	W
Operating Temperature Range	-55 to 175	°C
Package Type	TO-263-3 (D2PAK)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the AOB2910L is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 100V
Package Type: Must be TO-263-3 (D2PAK) surface mount
FET Type: Must be N-Channel MOSFET
Operating Temperature Range: Must support -55°C to 175°C minimum
Continuous Drain Current (Tc): Must support minimum 30A at case temperature
RoHS Compliance: Must maintain ROHS3 compliance status

Secondary Compatibility Parameters:

Rds(on) characteristics: Lower or equivalent values indicate improved performance
Gate Charge (Qg): Lower values reduce switching losses
Input Capacitance (Ciss): Lower values improve switching speed
Power Dissipation: Higher ratings provide thermal margin

Substitute parts are grouped into two categories: direct replacements with equivalent or superior electrical performance, and functional alternatives that meet minimum electrical requirements while offering enhanced thermal or switching characteristics.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vdss (V)	Id @ Tc (A)	Rds(on) Max (mOhm)	Vgs(th) @ 250µA (V)	Qg @ 10V (nC)	Ciss @ 25V (pF)	Power Diss. Tc (W)	Package	Product Status
AOB2910L	Alpha & Omega Semiconductor	100	30	23.5	2.7	25	1190	50	TO-263-3	Obsolete
AUIRF3710ZSTRL	Infineon Technologies	100	59	18	4	120	2900	160	TO-263-3	Active
BUK7626-100B,118	Nexperia USA Inc.	100	49	26	4	38	2891	157	TO-263-3	Obsolete
BUK9620-100B,118	Nexperia USA Inc.	100	63	18.5	2	53.4	5657	203	TO-263-3	Active
BUK9629-100B,118	Nexperia USA Inc.	100	46	27	2	33	4360	157	TO-263-3	Active
FDB3672-F085	onsemi	100	44	28	4	31	1710	120	TO-263-3	Obsolete
FDB3682	onsemi	100	32	36	4	28	1250	95	TO-263-3	Active
FDB86102LZ	Fairchild Semiconductor	100	30	24	3	21	1275	3.1	TO-263-3	Active
FQB55N10TM	onsemi	100	55	26	4	98	2730	155	TO-263-3	Active
IRF3710STRLPBF	Infineon Technologies	100	57	23	4	130	3130	200	TO-263-3	Active
IRF3710ZSTRLPBF	Infineon Technologies	100	59	18	4	120	2900	160	TO-263-3	Active

Engineering Selection Recommendations

Tier 1: Direct Replacements (Active Status, Equivalent Performance)

The following parts are recommended as primary substitutes due to active product status and electrical characteristics that meet or exceed the AOB2910L specifications:

BUK9620-100B,118 (Nexperia USA Inc.): Rated for 63A continuous drain current at case temperature with 18.5mOhm Rds(on). Active product status with AEC-Q101 automotive qualification. Provides superior thermal performance (203W Tc) and lower on-resistance compared to the original part.
AUIRF3710ZSTRL and IRF3710ZSTRLPBF (Infineon Technologies): Both rated for 59A continuous drain current at case temperature with 18mOhm Rds(on). Active product status with HEXFET® series designation. Provide enhanced current handling and thermal dissipation (160W Tc).
FQB55N10TM (onsemi): Rated for 55A continuous drain current at case temperature with 26mOhm Rds(on). Active product status with QFET® series designation. Provides 155W thermal dissipation capability.

Tier 2: Functional Alternatives (Active Status, Minimum Compliance)

The following parts meet minimum electrical requirements with active product status:

BUK9629-100B,118 (Nexperia USA Inc.): Rated for 46A continuous drain current at case temperature. Active product status with AEC-Q101 automotive qualification. Suitable for applications where current requirements are within 46A range.
FDB3682 (onsemi): Rated for 32A continuous drain current at case temperature, matching the original part's Tc rating. Active product status. Provides 95W thermal dissipation.
IRF3710STRLPBF (Infineon Technologies): Rated for 57A continuous drain current at case temperature with 23mOhm Rds(on). Active product status. Provides 200W thermal dissipation.

Tier 3: Obsolete Alternatives (Not Recommended for New Designs)

BUK7626-100B,118 (Nexperia USA Inc.): Obsolete status. Use only for repair of existing equipment.
FDB3672-F085 (onsemi): Obsolete status. Use only for repair of existing equipment.

All recommended substitutes maintain ROHS3 compliance, TO-263-3 package compatibility, and -55°C to 175°C operating temperature range.

Frequently Asked Questions (FAQ)

Q1: Can I use a substitute part with higher continuous drain current rating than the AOB2910L?

A: Yes. A substitute part with equal or higher continuous drain current rating (Tc) is electrically compatible. The AOB2910L is rated for 30A at case temperature. Any substitute rated for 30A or higher meets this requirement. Higher current ratings provide additional design margin and do not create incompatibility.

Q2: What is the significance of Rds(on) differences between the AOB2910L and substitute parts?

A: Rds(on) is the on-state drain-to-source resistance. Lower Rds(on) values result in reduced power dissipation and heat generation during operation. The AOB2910L specifies 23.5mOhm maximum at 20A, 10V. Substitutes with lower Rds(on) values (such as 18mOhm) provide improved efficiency. Substitutes with higher Rds(on) values may increase power dissipation and require thermal design verification.

Q3: Are all substitute parts pin-compatible with the AOB2910L?

A: Yes. All listed substitute parts use the TO-263-3 (D2PAK) package with identical pin configuration: Gate, Drain, and Source connections. Physical mounting and electrical connections are directly compatible without modification.

Q4: What does "Active" versus "Obsolete" product status mean for substitution?

A: Active status indicates the manufacturer currently produces and supports the part, ensuring long-term availability and supply chain reliability. Obsolete status indicates the manufacturer has discontinued production. For new designs, active-status parts are preferred. Obsolete parts may be used for repair of existing equipment but should not be selected for new production designs.

Q5: Does the gate charge (Qg) difference affect circuit design?

A: Gate charge affects the gate drive circuit requirements and switching speed. The AOB2910L specifies 25nC at 10V. Substitute parts range from 21nC to 130nC. Higher gate charge values require more gate drive current and may increase switching losses. Lower values reduce gate drive requirements. Circuit design must accommodate the gate charge specification of the selected substitute.

Q6: Can I substitute the AOB2910L with a part rated for lower voltage (e.g., 60V instead of 100V)?

A: No. Voltage rating substitution must be equal to or greater than the original part. The AOB2910L is rated for 100V Vdss. A substitute must be rated for 100V or higher. Using a lower voltage-rated device creates risk of device failure under normal operating conditions.

Q7: What is the importance of RoHS compliance status?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations, restricting lead, cadmium, mercury, and other hazardous materials. All listed substitutes maintain ROHS3 compliance, ensuring regulatory compliance for end-use applications and environmental safety.

Q8: Are automotive-qualified parts (AEC-Q101) required for all applications?

A: AEC-Q101 qualification is required only for automotive applications. Parts such as BUK9620-100B,118 and BUK9629-100B,118 carry this qualification. For non-automotive applications, AEC-Q101 qualification is not a requirement, though it indicates enhanced reliability testing and quality standards.

Q9: How do I determine which substitute part is best for my specific application?

A: Selection depends on application requirements: (1) Verify minimum continuous drain current requirement does not exceed the substitute's Tc rating; (2) Confirm voltage rating is 100V or higher; (3) Verify package compatibility (TO-263-3); (4) For new designs, prioritize active-status parts; (5) For thermal-sensitive applications, select parts with higher power dissipation ratings (Tc); (6) For switching-speed-critical applications, consider lower gate charge values.

Q10: Can I use multiple substitute parts interchangeably in the same circuit?

A: Yes, provided each substitute meets the minimum electrical requirements for the application. However, mixing different part numbers in the same circuit may introduce performance variations due to differences in Rds(on), gate charge, and thermal characteristics. For consistency, use the same part number throughout a design.

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