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SQM40022EM_KE3-VB Product details
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SQM40022EM_KE3-VB is a Single N-MOSFET deeply optimized for low-voltage, high-current power switching applications. The Trench technology balances ultra-low conduction losses with high switching reliability, while the TO263-7L package achieves a good trade-off between heat dissipation capability and soldering process compatibility. The combination of 40V drain-source voltage, 350A current carrying capacity, and 0.9mΩ on-resistance makes it an ideal power switch option for high-power-density power supplies, motor drives, and automotive electronics, especially suitable for applications with stringent requirements on conduction losses and temperature rise.
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Product parameter：
| VB Package | Configuration | VDS(V) | VGS | Vthyp（V） | ID(A) | Rds2.5 | Rds4.5 | Rds10 | Technology |
|---|---|---|---|---|---|---|---|---|---|
| TO263-7L | Single-N | 40V | 3V | 350A | 0.9(mΩ) | Trench |
| VB Package | Configuration | VCE | VGE | VGEth(V) | VCEsat15V | ICE | Technology |
|---|---|---|---|---|---|---|---|
| TO263-7L | Single-N | Trench |
| VB Package | Configuration | VDS(V) | VGS | Vthyp（V） | ID(A) | Rds18 | Technology |
|---|---|---|---|---|---|---|---|
| TO263-7L | Single-N | 40V | 3V | 350A | Trench |
| VB Package | Configuration | VDS(V) | VGS | Vthyp（V） | ID(A) | Rds6 | Technology |
|---|---|---|---|---|---|---|---|
| TO263-7L | Single-N | 40V | 3V | 350A | Trench |
| VB Package | Polarity | Vz / VR | Pd | VF | IF | IR | Cd | Type |
|---|---|---|---|---|---|---|---|---|
| TO263-7L | Single-N |
VDS=40V: Suitable for 12V/24V/36V systems, providing sufficient margin for switching spikes and load transients, reducing avalanche breakdown risk.
VGS=±20V: Compatible with 5V~12V logic level drive, can work with gate driver ICs or MCU PWM output, flexible for various control architectures.
Vth=3V (Typical): Moderate threshold voltage, strong anti-interference capability, ensures full conduction at 10V drive, suitable for industrial stable drive scenarios.
RDS(on)=0.9mΩ @ VGS=10V: Ultra-low on-resistance, minimal conduction loss at full load, significantly reduces power device temperature rise and eases parallel heat dissipation design.
ID=350A: High continuous current margin, capable of handling extreme current surges such as heavy load startup, stall, and short-circuit transients, improving system robustness.
Package TO263-7L: Multi-pin package enhances heat dissipation path and current carrying capacity, suitable for high-heat, high-current power lines, compatible with standard SMT assembly process.
Domain and module applications：
High-power DC-DC Converters: In synchronous rectification or high-efficiency buck/boost topologies, the 0.9mΩ ultra-low on-resistance can significantly reduce rectification losses, helping modules achieve higher conversion efficiency.
Automotive Electronics and Vehicle Power Supplies: The 40V withstand voltage covers 12V/24V vehicle bus transient scenarios, and the 350A high-current capability meets the needs of high-power loads like start-stop systems, EPS, and PTC heaters.
Server and Communication Power Supplies: In 12V redundant power supplies, PAC, and OR-ing circuits, the extremely low conduction voltage drop reduces heat dissipation, improving power system reliability.
High-power BLDC Motor Drives: The switching characteristics at PWM frequencies combined with ultra-low on-resistance result in lower temperature rise and smoother waveforms in motor control, suitable for power tools, electric two-wheelers, etc.
Battery Protection and BMS Systems: For charge/discharge circuits of large-capacity lithium battery packs, the low on-resistance reduces self-heating of the protection board, and the high-current carrying capacity ensures reliable disconnection during overcurrent events.
Low-voltage, High-current Switching Circuits: Can serve as an electronic switch or load switch for high-power loads, replacing multiple parallel MOSFETs, simplifying PCB layout, and reducing system cost.
Energy Storage Converters and Inverter Auxiliary Power Supplies: The voltage margin and wide operating temperature range adapt to harsh conditions in energy storage systems, and the high-reliability package ensures long-term operational stability. Selection Summary: SQM40022EM_KE3-VB achieves an excellent balance between ultra-low on-resistance, ultra-high current carrying capacity, and the thermal dissipation advantages of the TO263-7L package. It is a high-performance general-purpose choice for 40V low-voltage, high-current switching applications, especially suitable for power system designs with extreme requirements for efficiency, temperature rise, and reliability.
* Please note: the above is only an example application scenario, the specific application depends on the requirements and conditions of the system design. When using this device, consult its data sheet for detailed technical specifications and features
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