AOB414 N-Channel MOSFET 100V 6.6A/51A TO-263 Equivalent & Substitute Parts

Part Overview

The AOB414 is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 100V drain-to-source voltage with continuous drain current of 6.6A at Ta and 51A at Tc. The device is housed in a TO-263 (D2PAK) surface mount package and is part of the SDMOS™ series. This part is currently in active production status with 83,416 pieces in stock.

Substitute parts are necessary when the AOB414 becomes unavailable, when design requirements demand alternative electrical characteristics within the same voltage class, or when supply chain optimization requires qualified alternatives from different manufacturers. All substitute parts listed maintain the 100V Vdss rating and TO-263 package compatibility while offering variations in continuous drain current, on-resistance, and power dissipation characteristics.

Key Parameters

Parameter	AOB414 Value	Unit
Drain-to-Source Voltage (Vdss)	100	V
Continuous Drain Current @ Ta	6.6	A
Continuous Drain Current @ Tc	51	A
On-Resistance (Rds On) @ 20A, 10V	25	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	4	V
Gate Charge (Qg) @ 10V	34	nC
Power Dissipation @ Ta	2.5	W
Power Dissipation @ Tc	150	W
Operating Temperature Range	-55 to 175	°C
Package Type	TO-263 (D2PAK)	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of N-Channel MOSFETs in the 100V class is determined by the following critical parameters:

Voltage Rating: All substitute parts maintain 100V Vdss, ensuring compatibility with the same circuit voltage specifications as the AOB414.

Package Compatibility: All substitutes use TO-263 (D2PAK) surface mount packaging, maintaining identical PCB footprint and thermal interface characteristics.

Continuous Drain Current: Substitute parts range from 30A to 64A at Tc, providing options for designs requiring higher current handling or for applications where the AOB414's 51A rating exceeds requirements.

On-Resistance (Rds On): Values range from 24mOhm to 34.5mOhm at specified gate-source voltages, affecting power dissipation and thermal performance in switching applications.

Gate Charge (Qg): Ranges from 21nC to 100nC, influencing gate drive requirements and switching speed characteristics.

Power Dissipation: Ranges from 86W to 357W at Tc, determining thermal management requirements and maximum operating conditions.

Operating Temperature Range: All parts support -55°C to 175°C operation, with one exception (FDB86102LZ) rated to 150°C.

Compliance Status: All parts are ROHS3 compliant and REACH unaffected, maintaining regulatory compatibility with the original part.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vdss (V)	Id @ Tc (A)	Rds On (mOhm)	Qg @ 10V (nC)	Power Diss. @ Tc (W)	Temp Range (°C)	Product Status
AOB414	Alpha & Omega Semiconductor Inc.	100	51	25	34	150	-55 to 175	Active
BUK9629-100B,118	Nexperia USA Inc.	100	46	27	33	157	-55 to 175	Active
FDB3672-F085	onsemi	100	44	28	31	120	-55 to 175	Obsolete
FDB86102LZ	Fairchild Semiconductor	100	30	24	21	3.1	-55 to 150	Active
HUF76639S3ST	onsemi	100	51	26	86	180	-55 to 175	Active
IXTA64N10L2	IXYS	100	64	32	100	357	-55 to 150	Active
NTB6413ANT4G	onsemi	100	42	28	51	136	-55 to 175	Active
PHB45NQ10T,118	Nexperia USA Inc.	100	47	25	61	150	-55 to 175	Active
PSMN034-100BS,118	Nexperia USA Inc.	100	32	34.5	23.8	86	-55 to 175	Active
RSJ400N10TL	Rohm Semiconductor	100	40	27	90	50	-55 to 150	Active
STB40NF10LT4	STMicroelectronics	100	40	33	64	150	-55 to 175	Active

Engineering Selection Recommendations

Direct Electrical Equivalents: HUF76639S3ST and PHB45NQ10T,118 provide the closest electrical match to the AOB414, both rated for 51A and 47A continuous drain current respectively at Tc, with comparable on-resistance and power dissipation characteristics. Both parts are active production status with full temperature range support (-55°C to 175°C).

Higher Current Capability: IXTA64N10L2 offers the highest continuous drain current at 64A with 357W power dissipation, suitable for applications requiring enhanced thermal performance or higher current margins. This part is active but operates to 150°C maximum.

Lower Current Applications: PSMN034-100BS,118 and FDB86102LZ provide reduced current ratings (32A and 30A respectively) for designs where the AOB414's 51A rating exceeds requirements, offering lower gate charge and reduced power dissipation.

Compliance and Certification: All active production substitutes maintain ROHS3 compliance and REACH unaffected status. BUK9629-100B,118 and FDB3672-F085 carry AEC-Q101 automotive qualification, suitable for automotive-grade applications.

Obsolete Parts: FDB3672-F085 is marked obsolete and should not be selected for new designs despite electrical compatibility.

Temperature Range Consideration: RSJ400N10TL and IXTA64N10L2 operate to 150°C maximum, limiting use in applications requiring the full -55°C to 175°C range supported by the AOB414.

Frequently Asked Questions (FAQ)

Q: Can I substitute the AOB414 with any of these parts directly without circuit modification?

A: All listed substitute parts share the same 100V Vdss rating and TO-263 package footprint. However, differences in on-resistance, gate charge, and power dissipation may affect circuit performance. Verify that the substitute part's electrical characteristics are acceptable for your specific application requirements.

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

A: Ta represents continuous drain current at ambient temperature (typically 25°C), while Tc represents continuous drain current at case temperature. Tc ratings are higher due to improved heat dissipation at the device case. Design calculations should use the appropriate rating based on your thermal management approach.

Q: Why do some substitutes have significantly higher gate charge (Qg)?

A: Gate charge affects the energy required to switch the MOSFET and influences switching speed. Higher gate charge (such as HUF76639S3ST at 86nC and IXTA64N10L2 at 100nC) requires more gate drive current or longer switching times. Lower gate charge (FDB86102LZ at 21nC) enables faster switching with reduced gate drive requirements.

Q: Are all substitute parts suitable for automotive applications?

A: Only BUK9629-100B,118 and FDB3672-F085 carry AEC-Q101 automotive qualification. Other parts are industrial-grade unless otherwise specified. Verify automotive qualification requirements with your application specifications.

Q: What is the significance of the TO-263 (D2PAK) package designation?

A: TO-263 and D2PAK are equivalent package designations for a three-lead surface mount package with a thermal tab. All listed parts use this package, ensuring identical PCB footprint compatibility and thermal interface characteristics with the AOB414.

Q: Why is FDB3672-F085 listed if it is obsolete?

A: Obsolete parts are included for reference in legacy system maintenance and repair applications. For new designs, select only active production parts such as HUF76639S3ST, BUK9629-100B,118, or PHB45NQ10T,118.

Q: How do I determine which substitute is best for my application?

A: Compare your circuit requirements against the parameter table. If your design requires 51A continuous current, select HUF76639S3ST. If lower current suffices, PSMN034-100BS,118 or FDB86102LZ reduce power dissipation. If automotive qualification is required, use BUK9629-100B,118. Verify operating temperature range compatibility with your application's thermal environment.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape packaging is supplied in individual strips suitable for manual assembly or small-volume production. Tape & Reel packaging is supplied on continuous reels for automated pick-and-place assembly. Both formats contain identical components; packaging format selection depends on manufacturing process requirements.

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