AOB418L N-Channel MOSFET 100V 9.5A/105A TO-263 Equivalent & Substitute Parts

Part Overview

The AOB418L is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 100V drain-to-source voltage with continuous drain current of 9.5A at Ta and 105A at Tc. The device is housed in a TO-263 (D2PAK) surface mount package and belongs to the SDMOS™ series. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The AOB418L operates across a temperature range of -55°C to 175°C and is suitable for applications requiring moderate voltage and current handling in compact surface mount form factors.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	100	V
Continuous Drain Current @ 25°C (Ta)	9.5	A
Continuous Drain Current @ 25°C (Tc)	105	A
On-Resistance (Rds On) @ 20A, 10V	9.7	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	3.9	V
Gate Charge (Qg) @ 10V	83	nC
Input Capacitance (Ciss) @ 50V	5200	pF
Power Dissipation (Ta)	2.1	W
Power Dissipation (Tc)	333	W
Operating Temperature Range	-55 to 175	°C
Package Type	TO-263 (D2PAK)	Surface Mount
FET Type	N-Channel
Technology	MOSFET (Metal Oxide)

Substitute Part Grouping Explanation

Substitution of the AOB418L is determined by strict alignment of electrical and mechanical parameters within the N-Channel MOSFET category. The primary substitution criteria are:

Voltage Rating Compatibility: Substitute parts must maintain the 100V Vdss rating to ensure safe operation in circuits designed for the AOB418L. Parts with lower voltage ratings (30V) are not suitable for direct substitution in 100V applications.

Current Handling Capability: The continuous drain current specification (Tc rating) must equal or exceed the AOB418L's 105A rating to support equivalent or higher current loads without thermal derating.

On-Resistance (Rds On): The maximum on-resistance must be comparable to the AOB418L's 9.7mOhm specification to maintain similar power dissipation characteristics and thermal performance.

Package Compatibility: All substitute parts must use the TO-263 (D2PAK) surface mount package or compatible variants (TO-263-3, TO-263-7, TO-263AA) to ensure mechanical fit and thermal interface compatibility.

Gate Charge and Threshold Voltage: Gate charge (Qg) and gate threshold voltage (Vgs(th)) must be within acceptable ranges to ensure compatible gate drive requirements and switching characteristics.

Operating Temperature Range: Substitute parts must support the full -55°C to 175°C operating temperature range.

Moisture Sensitivity Level (MSL): MSL 1 (Unlimited) is preferred for compatibility with standard assembly processes.

Substitute parts meeting these criteria are grouped into two categories:

Category A - Direct Voltage/Current Equivalents (100V, 100A+): IXTA130N10T, IXTA130N10T7, IXFA130N10T, IXFA130N10T2, SQM100N10-10_GE3, SQM120N10-09_GE3

Category B - Lower Voltage Alternatives (30V): IRF3709ZSTRRPBF, IRL3803STRLPBF

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ Tc (A)	Rds On (mOhm)	Qg (nC)	Vgs(th) (V)	Package	Status
AOB418L	Alpha & Omega	100	105	9.7 @ 20A, 10V	83 @ 10V	3.9 @ 250µA	TO-263 (D2PAK)	Obsolete
IXTA130N10T	IXYS	100	130	9.1 @ 25A, 10V	104 @ 10V	4.5 @ 250µA	TO-263AA	Active
IXTA130N10T7	IXYS	100	130	9.1 @ 25A, 10V	104 @ 10V	4.5 @ 250µA	TO-263-7	Active
IXFA130N10T	IXYS	100	130	9.1 @ 25A, 10V	104 @ 10V	4.5 @ 1mA	TO-263AA (IXFA)	Active
IXFA130N10T2	IXYS	100	130	9.1 @ 65A, 10V	130 @ 10V	4.5 @ 1mA	TO-263AA (IXFA)	Active
SQM100N10-10_GE3	Vishay Siliconix	100	100	10.5 @ 30A, 10V	185 @ 10V	2.5 @ 250µA	TO-263 (D2PAK)	Active
SQM120N10-09_GE3	Vishay Siliconix	100	120	9.5 @ 30A, 10V	180 @ 10V	3.5 @ 250µA	TO-263 (D2PAK)	Active
IRF3709ZSTRRPBF	Infineon	30	87	6.3 @ 21A, 10V	26 @ 4.5V	2.25 @ 250µA	D2PAK	Not For New Designs
IRL3803STRLPBF	Infineon	30	140	6 @ 71A, 10V	140 @ 4.5V	1 @ 250µA	D2PAK	Not For New Designs

Engineering Selection Recommendations

For Direct Replacement in 100V Applications:

The IXTA130N10T, IXTA130N10T7, IXFA130N10T, and IXFA130N10T2 are active production parts manufactured by IXYS with 100V Vdss ratings and continuous drain currents of 130A at Tc, exceeding the AOB418L's 105A specification. These devices maintain comparable on-resistance values (9.1mOhm) and operate across the same temperature range (-55°C to 175°C). All IXYS parts carry RoHS3 compliance and MSL 1 ratings. The IXTA130N10T and IXTA130N10T7 variants differ in package configuration (TO-263AA versus TO-263-7) and gate charge specifications. IXFA130N10T and IXFA130N10T2 offer HiPerFET™ and Trench technology with slightly higher gate charge values. These parts are suitable for applications requiring equivalent or higher current capacity.

For Automotive and AEC-Q101 Qualified Applications:

The SQM100N10-10_GE3 and SQM120N10-09_GE3 manufactured by Vishay Siliconix are active production parts with 100V Vdss ratings, AEC-Q101 automotive qualification, and RoHS3 compliance. The SQM100N10-10_GE3 provides 100A continuous drain current with 10.5mOhm on-resistance, closely matching the AOB418L's current specification. The SQM120N10-09_GE3 offers 120A continuous drain current with 9.5mOhm on-resistance. Both devices use the standard TO-263 (D2PAK) package and maintain MSL 1 ratings. These parts are recommended for applications requiring automotive-grade reliability and traceability.

For Lower Voltage Applications (30V Systems):

The IRF3709ZSTRRPBF and IRL3803STRLPBF manufactured by Infineon are not suitable for direct substitution in 100V circuits due to their 30V Vdss rating. These parts are classified as "Not For New Designs" and should only be considered for legacy system maintenance where 30V operation is specified. The IRF3709ZSTRRPBF provides 87A continuous drain current, while the IRL3803STRLPBF provides 140A. Both use D2PAK packaging and operate across the -55°C to 175°C temperature range.

Compliance and Product Status Considerations:

All recommended 100V substitutes (IXYS and Vishay parts) are active production devices with current RoHS3 compliance and REACH unaffected status. The AOB418L's obsolete status necessitates transition to active production alternatives. IXYS parts are available in tube and tape & reel packaging options. Vishay SQM series parts are supplied in tape & reel format with automotive qualification. Infineon parts are marked "Not For New Designs" and should be avoided for new circuit development.

Frequently Asked Questions (FAQ)

Q: Can the IRF3709ZSTRRPBF or IRL3803STRLPBF be used as direct replacements for the AOB418L?

A: No. These Infineon parts operate at 30V Vdss, while the AOB418L is rated for 100V. Using a 30V device in a 100V circuit will result in device failure. These parts are only suitable for applications specifically designed for 30V operation.

Q: What is the primary difference between IXTA130N10T and IXTA130N10T7?

A: Both parts share identical electrical specifications (100V, 130A, 9.1mOhm Rds On). The difference is in the package configuration: IXTA130N10T uses TO-263AA, while IXTA130N10T7 uses TO-263-7 (6 Leads + Tab). Verify your PCB layout requirements before selecting between these variants.

Q: Are the IXYS HiPerFET™ parts (IXFA130N10T) compatible with the AOB418L?

A: Yes. The IXFA130N10T and IXFA130N10T2 meet the 100V, 130A electrical requirements and use compatible TO-263AA packaging. Both are active production parts with RoHS3 compliance. The primary consideration is gate charge: IXFA parts have higher gate charge (104-130 nC) compared to the AOB418L (83 nC), which may require gate drive circuit adjustment.

Q: Why should I choose Vishay SQM parts over IXYS alternatives?

A: The Vishay SQM100N10-10_GE3 and SQM120N10-09_GE3 carry AEC-Q101 automotive qualification, making them suitable for automotive and industrial applications requiring documented reliability. Both are active production parts with standard TO-263 (D2PAK) packaging. Choose SQM parts if your application requires automotive-grade traceability and qualification documentation.

Q: What is the impact of different on-resistance values on circuit performance?

A: On-resistance directly affects power dissipation and thermal performance. The AOB418L has 9.7mOhm Rds On, while IXYS alternatives offer 9.1mOhm (lower dissipation) and Vishay SQM parts offer 9.5-10.5mOhm. Lower on-resistance reduces heat generation. Verify that your thermal management design accommodates the specific Rds On value of your selected substitute.

Q: Can I use IXTA130N10T-TRL (tape & reel version) in place of the tube-packaged IXTA130N10T?

A: Yes. IXTA130N10T-TRL is electrically identical to IXTA130N10T with the same 100V, 130A specifications. The difference is packaging format: -TRL indicates tape & reel supply. Both are suitable for the same applications; choose based on your assembly process requirements (tube for manual assembly, tape & reel for automated pick-and-place).

Q: What is the significance of MSL (Moisture Sensitivity Level) ratings?

A: MSL 1 (Unlimited) indicates the part has no moisture sensitivity restrictions and can be stored indefinitely without special drying procedures. MSL 3 (168 Hours) requires controlled storage and baking before reflow soldering. The AOB418L and most recommended substitutes carry MSL 1. The IXTA130N10T-TRL carries MSL 3, requiring proper moisture control during assembly.

Q: Are there any gate drive voltage differences I should consider?

A: The AOB418L specifies Vgs(th) of 3.9V @ 250µA. IXYS parts specify 4.5V @ 250µA or 1mA, while Vishay SQM parts specify 2.5-3.5V. These differences may require gate drive circuit adjustment. Verify your gate driver can supply the required voltage and current for your selected substitute.

Q: What is the difference between IXFA130N10T and IXFA130N10T2?

A: Both parts are rated 100V, 130A with 9.1mOhm Rds On. The IXFA130N10T2 has higher gate charge (130 nC @ 10V) compared to IXFA130N10T (104 nC @ 10V), and the Rds On measurement point differs (65A versus 25A). IXFA130N10T2 is optimized for higher current applications. Select based on your specific gate drive capability and current profile.

Q: Is the AOB418L's 9.5A (Ta) rating important for substitution?

A: The 9.5A (Ta) rating represents continuous drain current at ambient temperature without case temperature consideration. The 105A (Tc) rating is the primary specification for thermal design. Substitutes must meet or exceed the 105A (Tc) specification. The Ta rating is secondary and typically not a limiting factor in substitute selection.

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