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AOT430 N-Channel MOSFET 75V 80A TO-220 Equivalent & Substitute Parts
Part Overview
The AOT430 is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 75V drain-to-source voltage with 80A continuous drain current at 25°C case temperature. This device is packaged in TO-220-3 through-hole configuration and is currently in active product status with 10,265 pieces in stock.
The AOT430 serves applications requiring high-current switching at moderate voltage levels, including power conversion, motor control, and industrial switching circuits. Equivalent and substitute parts are identified based on matching or exceeding critical electrical parameters: drain-to-source voltage rating (Vdss), continuous drain current (Id), on-state resistance (Rds On), and thermal characteristics, while maintaining compatible through-hole TO-220 packaging.
Substiute Parts
Key Parameters
| Parameter | AOT430 Value | Unit |
|---|---|---|
| Drain-to-Source Voltage (Vdss) | 75 | V |
| Continuous Drain Current (Id) @ 25°C | 80 | A (Tc) |
| Rds On (Max) @ Id, Vgs | 11.5 | mOhm @ 30A, 10V |
| Gate Threshold Voltage (Vgs(th)) @ Id | 4 | V @ 250µA |
| Gate Charge (Qg) @ Vgs | 114 | nC @ 10V |
| Power Dissipation (Max) | 268 | W (Tc) |
| Operating Temperature Range | -55 to 175 | °C (TJ) |
| Package Type | TO-220-3 | Through Hole |
| Technology | MOSFET (Metal Oxide) | N-Channel |
Substitute Part Grouping Explanation
Substitution of the AOT430 is determined by the following critical parameters:
Primary Matching Criteria:
- Drain-to-Source Voltage (Vdss): 75V minimum
- Continuous Drain Current (Id): 80A or greater at 25°C case temperature
- On-State Resistance (Rds On): 11.5 mOhm or lower at specified gate voltage
- Package Type: TO-220-3 through-hole configuration
- Operating Temperature Range: -55°C to 175°C minimum
Secondary Compatibility Factors:
- Gate Threshold Voltage (Vgs(th)): 4V nominal
- Maximum Gate Voltage (Vgs Max): ±20V or greater
- RoHS3 Compliance and REACH Unaffected status
Substitute parts are grouped into two categories:
Direct Equivalents (Matching or Exceeding All Parameters): Parts that meet or exceed the AOT430 specifications across all critical electrical and thermal parameters, with identical or superior current handling and power dissipation ratings.
Functional Alternatives (Partial Parameter Matching): Parts that match Vdss and package requirements but may have lower current ratings or different thermal characteristics. These are suitable for applications where the full 80A capability is not required.
Parameter Comparison
| Part Number | Manufacturer | Vdss (V) | Id @ 25°C (A) | Rds On (mOhm) | Qg (nC) | Pd Max (W) | Product Status |
|---|---|---|---|---|---|---|---|
| AOT430 | Alpha & Omega Semiconductor | 75 | 80 (Tc) | 11.5 @ 30A, 10V | 114 @ 10V | 268 | Active |
| STP76NF75 | STMicroelectronics | 75 | 80 (Tc) | 11 @ 40A, 10V | 160 @ 10V | 300 | Active |
| STP75NF75 | STMicroelectronics | 75 | 80 (Tc) | 11 @ 40A, 10V | 160 @ 10V | 300 | Active |
| IRF2807PBF | Infineon Technologies | 75 | 82 (Tc) | 13 @ 43A, 10V | 160 @ 10V | 230 | Not For New Designs |
| FDP75N08A | onsemi | 75 | 75 (Tc) | 11 @ 37.5A, 10V | 104 @ 10V | 137 | Obsolete |
| PHP79NQ08LT,127 | Nexperia USA Inc. | 75 | 73 (Tc) | 16 @ 25A, 10V | 30 @ 5V | 157 | Obsolete |
| FDP16AN08A0 | Fairchild Semiconductor | 75 | 58 (Tc) | 16 @ 58A, 10V | 42 @ 10V | 135 | Active |
| PHP29N08T,127 | NXP Semiconductors | 75 | 27 (Tc) | 50 @ 14A, 11V | 19 @ 10V | 88 | Active |
| IRFZ44VZPBF | Infineon Technologies | 60 | 57 (Tc) | 12 @ 34A, 10V | 65 @ 10V | 92 | Not For New Designs |
| IRLB8721PBF | Infineon Technologies | 30 | 62 (Tc) | 8.7 @ 31A, 10V | 13 @ 4.5V | 65 | Active |
Engineering Selection Recommendations
Recommended Direct Substitutes (Active Product Status):
STP76NF75 and STP75NF75 (STMicroelectronics): Both parts are electrically equivalent to the AOT430, with matching 75V Vdss and 80A continuous drain current ratings. These devices feature superior power dissipation capability (300W vs. 268W) and are in active product status. RoHS3 compliance and REACH unaffected status are confirmed. STP76NF75 has limited inventory (1,400 pcs) while STP75NF75 has substantial availability (364,133 pcs).
FDP16AN08A0 (Fairchild Semiconductor): Active product with 75V Vdss rating. Continuous drain current is 58A (Tc), which is lower than the AOT430's 80A specification. This part is suitable for applications requiring less than 80A continuous current. RoHS3 compliance confirmed.
Alternative Substitutes (Conditional Use):
IRF2807PBF (Infineon Technologies): Meets electrical specifications with 75V Vdss and 82A continuous drain current. However, product status is "Not For New Designs," indicating this part is in end-of-life phase. Use only in legacy system maintenance or when no active alternatives are available.
FDP75N08A (onsemi): Rated for 75V Vdss with 75A continuous drain current. Product status is obsolete. This part should not be selected for new designs.
PHP79NQ08LT,127 (Nexperia USA Inc.): Rated for 75V Vdss with 73A continuous drain current. Product status is obsolete. Not recommended for new applications.
Not Recommended:
IRFZ44VZPBF (Infineon Technologies): Vdss rating is 60V, which is below the AOT430's 75V specification. This part is not suitable as a direct substitute and is in "Not For New Designs" status.
IRLB8721PBF (Infineon Technologies): Vdss rating is 30V, which is insufficient for 75V applications. This part is not compatible with the AOT430 application requirements.
PHP29N08T,127 (NXP Semiconductors): Continuous drain current is 27A (Tc), significantly below the 80A requirement. This part is suitable only for low-current applications and does not provide equivalent functionality.
Frequently Asked Questions (FAQ)
Q: Can the STP76NF75 directly replace the AOT430 in existing designs?
A: Yes. The STP76NF75 matches the AOT430 across all critical parameters: 75V Vdss, 80A continuous drain current, 11 mOhm Rds On, and TO-220-3 package. Both devices operate across -55°C to 175°C temperature range and are RoHS3 compliant. The STP76NF75 provides superior power dissipation (300W vs. 268W), making it a direct functional equivalent.
Q: What is the difference between STP76NF75 and STP75NF75?
A: Both parts are electrically identical with matching 75V Vdss, 80A continuous drain current, and 11 mOhm Rds On specifications. The primary difference is inventory availability: STP75NF75 has 364,133 pieces in stock, while STP76NF75 has 1,400 pieces. Both are active products suitable for new designs.
Q: Why is FDP75N08A listed as obsolete?
A: FDP75N08A is marked as obsolete by onsemi, indicating the manufacturer has discontinued active production and support. While the part may still be available from inventory, it should not be selected for new designs. The STP76NF75 or STP75NF75 are recommended as active alternatives.
Q: Can I use IRFZ44VZPBF as a substitute for the AOT430?
A: No. The IRFZ44VZPBF has a maximum Vdss rating of 60V, which is insufficient for applications requiring 75V operation. Additionally, the continuous drain current is 57A, below the AOT430's 80A specification. This part is not compatible with the AOT430 application requirements.
Q: What does "Not For New Designs" mean for IRF2807PBF?
A: "Not For New Designs" indicates that Infineon Technologies has designated this part for end-of-life phase. While the part may still be available and functional, the manufacturer does not recommend its use in new product development. For new applications, select active products such as STP76NF75 or STP75NF75.
Q: Is the FDP16AN08A0 suitable for my 80A application?
A: FDP16AN08A0 is rated for 58A continuous drain current at 25°C case temperature, which is below the 80A requirement. This part is suitable only for applications requiring 58A or less. For full 80A capability, use STP76NF75, STP75NF75, or IRF2807PBF.
Q: Are all substitute parts RoHS3 compliant?
A: RoHS3 compliance is confirmed for AOT430, STP76NF75, STP75NF75, IRF2807PBF, FDP75N08A, and PHP79NQ08LT,127. FDP16AN08A0 and PHP29N08T,127 do not have RoHS3 status explicitly provided in available data. IRFZ44VZPBF and IRLB8721PBF are RoHS3 compliant. Verify compliance requirements for your specific application before final part selection.
Q: What is the significance of gate charge (Qg) differences between parts?
A: Gate charge affects switching speed and driver circuit requirements. The AOT430 has 114 nC gate charge at 10V. STP76NF75 and STP75NF75 have 160 nC, requiring slightly more driver current for equivalent switching speed. FDP75N08A has 104 nC, providing faster switching characteristics. For most applications, these differences are not critical, but high-frequency switching circuits may require driver circuit adjustment.
Q: Can I use multiple lower-current parts in parallel to replace the AOT430?
A: Parallel operation of MOSFETs requires careful circuit design to ensure current sharing and thermal management. This approach is not recommended as a direct substitution strategy. Use single parts rated for the required current specification, such as STP76NF75 or STP75NF75.
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