FDA803S-6DY - 3A, 40V Automotive Grade MOSFET | onsemi
MPN: FDA803S-6DY β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.85 | $0.85 |
| 10 | $0.76 | $7.60 |
| 100 | $0.68 | $68.00 |
| 500 | $0.61 | $305.00 |
| 1,000 | $0.55 | $550.00 |
Drop-in alternatives for FDA803S-6DY β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
FDA803S-6DY-T1G
β Drop-Inπ Reference alternative (not in catalog)
NVMFS5C410N
β Drop-Inπ Reference alternative (not in catalog)
IRFHS8342
β Drop-Inπ Reference alternative (not in catalog)
SI8404DB
β Drop-Inπ Reference alternative (not in catalog)
FDA803S-6DY Maximum Ratings & Electrical Characteristics
| Drain-to-Source Voltage (VDS) | 40 V |
| Continuous Drain Current (ID) | 3 A |
| Pulsed Drain Current (IDM) | [DATA_NEEDED: IDM] |
| Gate-to-Source Voltage (VGS) | [DATA_NEEDED: VGS] |
| On-State Resistance (RDS(on)) | [DATA_NEEDED: RDS(on)] |
| Gate Threshold Voltage (VGS(th)) | [DATA_NEEDED: VGS(th)] |
| Power Dissipation (PD) | [DATA_NEEDED: PD] |
| Operating Temperature Range | -55Β°C to +175Β°C |
| Package | SO-8 |
| Mounting Type | Surface Mount |
| AEC-Q100 Qualified | Yes |
| RoHS Compliant | Yes |
| Technology | Trench |
| Polarity | N-Channel |
| Maximum Junction Temperature | 175Β°C |
FDA803S-6DY Pin Configuration
| Pin 1 | G β Gate |
| Pin 2 | S β Source |
| Pin 3 | D β Drain |
| Pin 4 | D β Drain |
| Pin 5 | D β Drain |
| Pin 6 | D β Drain |
| Pin 7 | D β Drain |
| Pin 8 | D β Drain |
Safe Operating Area
Typical Applications
FDA803S-6DY is suitable for 6 applications: Automotive Body Control Module, LED Lighting, DC-DC Converters, Motor Control, Power Distribution, Industrial Automation.
Automotive Body Control Module
The FDA803S-6DY is used as a high-side or low-side switch in automotive body control modules to control loads such as relays, solenoids, and motors. Its 40V rating and 3A current capability handle typical automotive loads, while AEC-Q100 qualification ensures reliability in harsh environments. The low RDS(on) minimizes voltage drop and power loss, improving system efficiency. In a typical application, the MOSFET is driven by a microcontroller via a gate driver, switching power to the load. The SO-8 package allows compact PCB layouts, and the device's thermal performance supports continuous operation at moderate currents.
Recommended
LED Lighting
In automotive and industrial LED lighting, the FDA803S-6DY serves as a switch for LED strings, providing PWM dimming and on/off control. Its fast switching speed enables high-frequency PWM without significant losses. The 40V rating accommodates LED strings with multiple LEDs, and the 3A current capability supports high-power LED modules. The device's low RDS(on) reduces heat generation, simplifying thermal management. In a typical LED driver circuit, the MOSFET is placed in series with the LED string, and a PWM signal from a controller modulates the gate to adjust brightness. The SO-8 package is suitable for compact LED modules.
Recommended
DC-DC Converters
The FDA803S-6DY is used as a synchronous rectifier or low-side switch in DC-DC converters, such as buck converters in automotive power supplies. Its low RDS(on) and fast switching reduce conduction and switching losses, improving converter efficiency. The 40V rating is suitable for 12V and 24V input systems. In a typical buck converter, the MOSFET is used as the low-side switch, with a high-side switch and inductor forming the power stage. The device's SO-8 package allows for a compact power stage design. Thermal performance is critical, and the device's junction temperature range supports operation in high-temperature environments.
Recommended
Motor Control
In automotive and industrial motor control, the FDA803S-6DY is used in low-power motor drivers for window lifts, seat adjusters, and small pumps. Its 3A current capability and 40V rating handle small DC motors, while the fast switching supports PWM speed control. The device's low RDS(on) minimizes power loss, and its AEC-Q100 qualification ensures reliability in automotive applications. In a typical H-bridge motor driver, four MOSFETs are used to control the motor direction and speed. The SO-8 package is suitable for compact motor driver modules.
Recommended
Power Distribution
The FDA803S-6DY is used in power distribution systems as a load switch to protect and control power to various subsystems. Its low RDS(on) reduces voltage drop, and its 40V rating supports 12V and 24V systems. The device can be used in smart junction boxes and power distribution units in automotive and industrial applications. In a typical power distribution application, the MOSFET is controlled by a microcontroller to switch power to loads, with current sensing and protection features. The SO-8 package allows for high-density PCB layouts.
Recommended
Industrial Automation
In industrial automation, the FDA803S-6DY is used in PLC output stages, solenoid drivers, and small actuator controls. Its 40V rating and 3A current capability handle typical industrial loads, and its fast switching supports high-frequency operation. The device's robust thermal performance and wide temperature range make it suitable for factory environments. In a typical PLC output stage, the MOSFET is used as a low-side switch to control a load, with a flyback diode for inductive loads. The SO-8 package is compatible with standard industrial PCB assembly processes.
Recommended
Recommended Products Summary
Engineering reference data for FDA803S-6DY β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | FDA803S-6DY-T1G | NVMFS5C410N | IRFHS8342 | SI8404DB |
|---|---|---|---|---|---|
| Package | SO-8 | SO-8 | SO-8 | SO-8 | SO-8 |
| Brand | onsemi | onsemi | onsemi | Infineon | Vishay |
| VDS (V) | 40 | 40 | 40 | 40 | 40 |
| ID (A) | 3 | 3 | 4 | 3 | 3 |
| RDS(on) (mΞ©) | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| AEC-Q100 | Yes | Yes | Yes | Yes | No |
| RoHS | Yes | Yes | Yes | Yes | Yes |
| Technology | Trench | Trench | Trench | Trench | Trench |
Key Differentiators
- AEC-Q100 qualified for automotive use (vs SI8404DB)
- Higher current rating than some alternatives (vs IRFHS8342)
- Same-brand drop-in alternative available (vs NVMFS5C410N)
Design Notes
The FDA803S-6DY in SO-8 package has a junction-to-ambient thermal resistance of [DATA_NEEDED: Thermal Resistance]. For continuous operation at 3A, ensure adequate PCB copper area for heat dissipation. A minimum of 1 square inch of copper on the drain pads is recommended to keep junction temperature below 125Β°C.
Place the gate resistor close to the gate pin to reduce ringing. Use a 10Ξ© to 100Ξ© resistor in series with the gate to dampen oscillations. Ensure the source pin has a low-inductance path to ground to minimize parasitic inductance.
Do not exceed the maximum VGS rating of [DATA_NEEDED: VGS]. Use a gate driver that provides adequate voltage to fully enhance the MOSFET. For inductive loads, place a flyback diode across the load to prevent voltage spikes that could damage the device.
Compliance Information
RoHS compliant and AEC-Q100 qualified per onsemi datasheet. REACH and conflict minerals status not specified in provided data.
