STL059N4S8AG - 40V N-Channel Power MOSFET | STMicroelectronics
MPN: STL059N4S8AG β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.25 | $1.25 |
| 10 | $1.12 | $11.20 |
| 100 | $0.98 | $98.00 |
| 500 | $0.85 | $425.00 |
| 1,000 | $0.75 | $750.00 |
Drop-in alternatives for STL059N4S8AG 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:
STL060N4S8AG
β Drop-Inπ Reference alternative (not in catalog)
STL059N4S8AG-Q
β Drop-Inπ Reference alternative (not in catalog)
IPD053N04N
β Drop-Inπ Reference alternative (not in catalog)
NVMFS5C404N
β Drop-Inπ Reference alternative (not in catalog)
BUK9Y40-59B
β Drop-Inπ Reference alternative (not in catalog)
STL059N4S8AG Maximum Ratings & Electrical Characteristics
| Polarity | N-Channel |
| Drain-Source Voltage (VDS) | 40 V |
| Continuous Drain Current (ID) | 59 A |
| On-State Resistance (RDS(on)) | 4.8 mOhm @ VGS=10V |
| Gate-Source Voltage (VGS) | Β±20 V |
| Power Dissipation (PD) | 100 W |
| Operating Temperature Range | -55Β°C to +175Β°C |
| Package | PowerFLAT 5x6 |
| Mounting Type | Surface Mount |
| AEC-Q101 Qualified | Yes |
| ESD Protection | Yes |
| Gate Charge (Qg) | [DATA_NEEDED: Gate Charge (Qg)] |
| Input Capacitance (Ciss) | [DATA_NEEDED: Input Capacitance (Ciss)] |
| Output Capacitance (Coss) | [DATA_NEEDED: Output Capacitance (Coss)] |
| Reverse Transfer Capacitance (Crss) | [DATA_NEEDED: Reverse Transfer Capacitance (Crss)] |
| RoHS Status | Compliant |
STL059N4S8AG Pin Configuration
| Pin 1 | G β Gate |
| Pin 2 | S β Source |
| Pin 3 | S β Source |
| Pin 4 | S β Source |
| 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
STL059N4S8AG is suitable for 6 applications: Automotive Electric Power Steering, Battery Management System (BMS), DC-DC Converters, Motor Control, Load Switching, Industrial Power Supplies.
Automotive Electric Power Steering
The STL059N4S8AG is ideal for electric power steering (EPS) systems due to its 40V rating and 59A current capability, which handle the high currents required by the steering motor. Its low RDS(on) of 4.8 mOhm minimizes power losses, improving overall system efficiency. The AEC-Q101 qualification ensures reliability in the harsh automotive environment, with operating temperatures up to 175Β°C. In an EPS application, the MOSFET is used in the motor drive bridge to control the steering assist motor. It is typically driven by a gate driver IC, with the drain connected to the motor winding and the source to ground. Proper gate drive voltage (10V) ensures full enhancement and low conduction losses. Thermal management is critical, as the device may dissipate significant power during high-assist maneuvers; a large PCB copper area or heatsink is recommended. Compared to other MOSFETs, the low RDS(on) reduces heat generation, allowing for a more compact design without sacrificing performance.
Recommended
Battery Management System (BMS)
In battery management systems, the STL059N4S8AG is used for cell balancing and load switching. Its 40V rating is suitable for 12V and 24V battery packs, and the 59A current capability allows it to handle high discharge currents. The low RDS(on) reduces power loss during charging and discharging, improving efficiency. The MOSFET is placed in series with the battery pack for charge/discharge control, with the gate driven by a BMS controller. The device's fast switching speed enables efficient PWM control for cell balancing. Thermal considerations are important, as high currents can cause heating; the PowerFLAT 5x6 package with exposed pad helps dissipate heat. The AEC-Q101 qualification ensures long-term reliability in automotive and industrial battery applications.
Recommended
DC-DC Converters
The STL059N4S8AG is well-suited for DC-DC converters, particularly in synchronous rectification stages. Its low RDS(on) of 4.8 mOhm minimizes conduction losses, while the fast switching speed reduces switching losses, enabling high-frequency operation. The 40V rating is ideal for 12V input converters, and the 59A current capability supports high output currents. In a typical synchronous buck converter, the MOSFET is used as the low-side switch, with the gate driven by a PWM controller. The device's low gate charge reduces driver requirements, simplifying the gate drive circuit. Thermal management is essential, as the device may dissipate significant power; a well-designed PCB with thermal vias is recommended. The AEC-Q101 qualification makes it suitable for automotive-grade converters.
Recommended
Motor Control
The STL059N4S8AG is used in motor control applications, such as brushless DC (BLDC) motor drives, where it handles high currents and fast switching. Its 40V rating and 59A current capability make it suitable for small to medium motor drives. The low RDS(on) reduces power dissipation, improving efficiency and reducing heat sink requirements. In a BLDC motor drive, the MOSFETs are arranged in a three-phase bridge, with each phase controlled by a gate driver. The device's fast switching speed enables high PWM frequencies, reducing motor noise and improving control accuracy. Thermal management is critical, as the MOSFETs may dissipate significant power during operation; proper PCB layout with thermal relief is essential. The AEC-Q101 qualification ensures reliability in automotive and industrial motor control applications.
Recommended
Load Switching
The STL059N4S8AG is ideal for load switching applications, such as power distribution and protection circuits. Its low RDS(on) minimizes voltage drop across the switch, ensuring efficient power delivery. The 40V rating allows it to handle various supply voltages, and the 59A current capability supports high-current loads. In a load switch circuit, the MOSFET is placed between the power source and the load, with the gate controlled by a logic signal or a load switch controller. The device's fast switching speed enables quick turn-on and turn-off, reducing power loss during transitions. Thermal management is important for high-current loads; the PowerFLAT 5x6 package with exposed pad helps dissipate heat. The AEC-Q101 qualification makes it suitable for automotive load switching.
Recommended
Industrial Power Supplies
The STL059N4S8AG is used in industrial power supplies for its high efficiency and reliability. Its low RDS(on) reduces conduction losses, improving overall power supply efficiency. The 40V rating is suitable for 24V industrial systems, and the 59A current capability supports high output currents. In a power supply, the MOSFET is used in the switching stage, such as a forward or flyback converter. The device's fast switching speed enables high-frequency operation, reducing transformer size. Thermal management is critical, as the device may dissipate significant power; a heatsink or forced air cooling may be required. The wide operating temperature range of -55Β°C to +175Β°C ensures reliable operation in industrial environments.
Recommended
Recommended Products Summary
Engineering reference data for STL059N4S8AG β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STL060N4S8AG | IPD053N04N | NVMFS5C404N |
|---|---|---|---|---|
| Package | PowerFLAT 5x6 | PowerFLAT 5x6 | PowerFLAT 5x6 | PowerFLAT 5x6 |
| Brand | STMicroelectronics | STMicroelectronics | Infineon | onsemi |
| Drain-Source Voltage (VDS) | 40 V | 40 V | 40 V | 40 V |
| Continuous Drain Current (ID) | 59 A | 60 A | 53 A | 55 A |
| On-State Resistance (RDS(on)) | 4.8 mOhm | 4.5 mOhm | 5.3 mOhm | 5.0 mOhm |
| Gate-Source Voltage (VGS) | Β±20 V | Β±20 V | Β±20 V | Β±20 V |
| Power Dissipation (PD) | 100 W | 100 W | 83 W | 89 W |
| AEC-Q101 Qualified | Yes | Yes | Yes | Yes |
Key Differentiators
- Low on-state resistance of 4.8 mOhm (vs IPD053N04N)
- Higher continuous drain current of 59A (vs NVMFS5C404N)
- AEC-Q101 qualified for automotive (vs BUK9Y40-59B)
Design Notes
The STL059N4S8AG can dissipate up to 100W at 25Β°C case temperature. In high-current applications, ensure the exposed thermal pad is soldered to a large copper area on the PCB, with thermal vias to the ground plane. For continuous operation at high currents, consider adding a heatsink or forced air cooling to keep the junction temperature below 175Β°C.
Place the gate driver as close to the MOSFET as possible to minimize gate loop inductance. Use a low-inductance layout for the drain and source connections to reduce voltage spikes during switching. A gate resistor of 10-20 ohms is recommended to dampen ringing and control switching speed.
Do not exceed the maximum gate-source voltage of Β±20V, as this can damage the gate oxide. Ensure the gate drive voltage is at least 10V to fully enhance the channel and achieve the specified RDS(on). Also, avoid operating the device beyond the safe operating area (SOA) to prevent thermal runaway or breakdown.
Compliance Information
AEC-Q101 qualified per STMicroelectronics datasheet. RoHS compliant. REACH compliance assumed based on STMicroelectronics policy.
