SMN40N30
40A 300V N-channel MOSFET for power supplies and motor controls with low RDS(on).
Product Overview
Description
The SMN40N30 is a high-performance N-channel MOSFET designed for power supply and motor control applications.
With 300V rating and 40A current capability, this MOSFET handles demanding power conversion applications.
The low RDS(on) ensures high efficiency and reduced heat generation.
Product Series
SMN
Primary Application
Server power supplies
Key Features
- 300V rating for power supply applications
- 40A continuous current capability
- Ultra-low RDS(on) for high efficiency
- Fast switching characteristics
- Robust avalanche energy rating
- Industry-standard TO-247 package
Specifications
| Voltage Rating | 300V |
|---|---|
| Current Rating | 40A |
| RDS(on) | 65mΩ typical @ 10V |
| Qgd | 25nC |
| Package | TO-247 |
| Avalanche Energy | 350mJ |
| Operating Temperature | -55°C to +150°C |
Applications
Server power supplies
Electronic system design
Motor controls
Motor drive and control systems
Battery chargers
Battery and charging management
LED drivers
Motor drive and control systems
Power factor correction
Electronic system design
FAE Expert Insights
"The SMN40N30 is a workhorse for 300V power supply applications. I've used this MOSFET extensively in PFC stages and main switching stages where the 65mΩ RDS(on) provides good efficiency without excessive cost. The 40A rating is sufficient for most single-phase power factor correction applications. The TO-247 package is industry standard and simplifies thermal management. For continuous conduction mode PFC, the switching losses are well-controlled. The avalanche energy rating provides robustness during startup and transients."
Excellent all-around 300V MOSFET for power supply and motor control applications
— Dr. Steven Wang, BeiLuo
Frequently Asked Questions
What gate resistor value is recommended?
For the SMN40N30, typical gate resistor values: 5-20 ohms for standard operation. Lower values (5-10 ohms) for faster switching and higher efficiency. Higher values (15-20 ohms) for reduced EMI and ringing. Start with 10 ohms and optimize based on switching waveforms and thermal performance. For synchronous rectification, lower values may be needed for fast turn-off.
Start with 10 ohms gate resistor. Adjust based on switching performance requirements.