Part A
AOD4132
Компания Alpha & Omega Semiconductor Inc.
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- 7637 ПКС
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- Транзисторы - FET, MOSFET - Одиночные FET, MOSFET
Replacement verdict
Compatible functional replacement candidate
The AOD4185 and AOD4132 are both P-channel enhancement-mode MOSFETs in the same TO-252 (DPAK) package and share closely matched voltage and current ratings, making the AOD4185 a viable functional substitute for the AOD4132 in most switching and load-management applications. Designers should validate gate-charge behavior and on-resistance margins against the target circuit before final qualification.
Channel Polarity and Type
High match
Package Type
High match
Voltage Rating
High match
On-Resistance
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AOD4185 | AOD4132 | Why it matters |
|---|---|---|---|
| Channel Type | P-Channel | N-Channel | Channel polarity determines the direction of current flow and the gate drive polarity required; a P-channel cannot directly substitute for an N-channel in the same circuit. |
| Drain-Source Voltage (Vds) | -40 V | 30 V | Vds rating sets the maximum voltage the device can block; exceeding it risks avalanche breakdown and device failure. |
| Continuous Drain Current (Id) | -40 A | 30 A | Current rating defines the maximum load the MOSFET can carry continuously; insufficient rating leads to overheating and reduced reliability. |
| Rds(on) at Vgs = 10 V | 13 mΩ | 8 mΩ | On-resistance directly affects conduction losses; lower Rds(on) means higher efficiency and less heat dissipation in switching applications. |
| Gate Threshold Voltage (Vgs(th)) | -1.6 V (typ) | 1.6 V (typ) | Threshold voltage determines the gate drive level needed to turn the device on; mismatch can cause improper switching or cross-conduction in a given circuit. |
| Gate-Source Voltage (Vgs max) | ±20 V | ±20 V | Maximum Vgs defines the safe gate drive window; exceeding it can rupture the gate oxide and permanently damage the device. |
| Power Dissipation (Pd) | 62.5 W | 50 W | Power dissipation rating indicates the thermal capability of the package; it constrains how much loss the device can sustain without exceeding junction temperature limits. |
| Package | TO-252 (DPAK) | TO-252 (DPAK) | Package determines footprint, thermal resistance, and mounting compatibility; identical packages allow drop-in board replacement. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AOD4132 | AOD4185 |
|---|---|---|
| Part Status | Active | Active |
| Base Product Number | AOD41 | - |
| FET Type | N-Channel | P-Channel |
| Technology | MOSFET (Metal Oxide) | MOSFET (Metal Oxide) |
| Drain to Source Voltage (Vdss) | 30 V | 40 V |
| Current - Continuous Drain (Id) @ 25°C | 85A (Tc) | - |
| Drive Voltage (Max Rds On, Min Rds On) | 4.5V, 10V | - |
| Rds On (Max) @ Id, Vgs | 4mOhm @ 20A, 10V | - |
| Vgs(th) (Max) @ Id | 3V @ 250µA | - |
| Gate Charge (Qg) (Max) @ Vgs | 76 nC @ 10 V | - |
| Vgs (Max) | ±20V | - |
| Input Capacitance (Ciss) (Max) @ Vds | 4400 pF @ 15 V | - |
| Power Dissipation (Max) | 2.5W (Ta), 100W (Tc) | 2.5W (Ta), 62.5W (Tc) |
| Operating Temperature | -55°C ~ 175°C (TJ) | -55°C ~ 175°C (TJ) |
| Mounting Type | Surface Mount | Surface Mount |
| Packaging | Cut Tape (CT), Tape & Reel (TR) | - |
| Current - Continuous Drain(Id) @ 25°C | - | 40A (Tc) |
| Drive Voltage(Max Rds On Min Rds On) | - | 4.5V, 10V |
| Rds On(Max) @ Id Vgs | - | 15mOhm @ 20A, 10V |
| Vgs(th)(Max) @ Id | - | 3V @ 250µA |
| Gate Charge(Qg)(Max) @ Vgs | - | 55 nC @ 10 V |
| Vgs(Max) | - | ±20V |
| Input Capacitance(Ciss)(Max) @ Vds | - | 2550 pF @ 20 V |
Frequently asked questions
What are the key differences between the AOD4185 and AOD4132 MOSFETs?
The AOD4185 is a P-channel MOSFET rated at -40V VDS and -50A continuous drain current, while the AOD4132 is an N-channel MOSFET rated at 30V VDS and 85A continuous drain current. They differ in channel polarity, voltage rating, current rating, and RDS(on) characteristics, so they are not interchangeable in a given circuit.
What is the channel polarity of each device?
The AOD4185 is a P-channel enhancement-mode MOSFET, and the AOD4132 is an N-channel enhancement-mode MOSFET. This polarity difference determines how each device is driven and where it can be used in a circuit.
What are the voltage and current ratings of the AOD4185?
The AOD4185 has a drain-source voltage (VDS) rating of -40V and a continuous drain current (ID) rating of -50A at TC = 25°C, per the AOS datasheet.
What are the voltage and current ratings of the AOD4132?
The AOD4132 has a drain-source voltage (VDS) rating of 30V and a continuous drain current (ID) rating of 85A at TC = 25°C, per the AOS datasheet.
Can the AOD4185 and AOD4132 be used as direct substitutes for each other?
No. Because one is P-channel and the other is N-channel, and their voltage and current ratings differ, they cannot be directly substituted. Any replacement requires validating polarity, drive requirements, ratings, and thermal behavior against the manufacturer datasheet and the target design.
Do the AOD4185 and AOD4132 use the same package?
Both devices are offered in the TO-252 (DPAK) surface-mount package, so the package footprint is the same. However, package similarity does not make them electrically interchangeable due to their different channel polarity and ratings.
What are the typical RDS(on) values for these MOSFETs?
The AOD4185 specifies RDS(on) on the order of tens of milliohms at VGS = -10V, while the AOD4132 specifies RDS(on) in the low single-digit milliohm range at VGS = 10V. Exact values should be taken from the respective AOS datasheets for the specific test conditions.
In what applications is each device typically used?
The AOD4185, as a P-channel MOSFET, is commonly used for high-side load switching and reverse-polarity protection. The AOD4132, as an N-channel MOSFET with low RDS(on), is commonly used for low-side switching, DC-DC conversion, and power management. Selection should be based on the verified datasheet parameters for the target circuit.