STW78N65M5
650V MDmesh M5 series power MOSFET with 78A current rating, 45mΩ typical Rds(on), for high-power industrial and automotive applications.
Product Overview
Description
The STW78N65M5 is a high-current N-channel power MOSFET utilizing ST's advanced MDmesh M5 super-junction technology.
With 650V voltage rating and ultra-low 45mΩ Rds(on), it delivers exceptional efficiency for high-power applications.
The device is designed for demanding industrial and automotive applications requiring high current capability and reliability.
Product Series
Primary Application
Key Features
- MDmesh M5 super-junction technology
- High current capability: 78A
- Ultra-low Rds(on): 45mΩ typical
- 100% avalanche tested
- High dv/dt ruggedness
- Operating temperature: -55°C to +150°C
Specifications
| Voltage Rating | 650 V |
|---|---|
| Current Rating | 78 A |
| Rds(on) max | 60 mΩ |
| Rds(on) typ | 45 mΩ |
| Qg | 155 nC |
| Package | TO-247 |
| Temperature Range | N/A |
Applications
High-power SMPS
Industrial application for 650V N-Channel Power MOSFET
Industrial inverters
Industrial application for 650V N-Channel Power MOSFET
EV charging infrastructure
Industrial application for 650V N-Channel Power MOSFET
Welding equipment
Industrial application for 650V N-Channel Power MOSFET
Motor drives
Industrial application for 650V N-Channel Power MOSFET
FAE Expert Insights
"The STW78N65M5 is a workhorse for high-power applications. The 78A current rating makes it suitable for 5-10kW power conversion systems. I've used this device in industrial inverter designs where reliability is paramount. The M5 technology provides excellent Rds(on) performance even at high temperatures. The avalanche ruggedness is important for inductive load switching. While the gate charge is higher than lower-current devices, it's well-balanced for the current capability. This device competes well with IGBTs in the 5-10kW range while offering better switching performance. For high-power industrial applications, this is a solid choice."
High-current capability for demanding industrial applications
— James Liu, BeiLuo
Frequently Asked Questions
What applications benefit from 78A current rating?
The 78A rating enables: High-power SMPS (5-10kW); Industrial motor drives (5-10HP); EV charging modules (7-11kW); Solar inverters (5-10kW); Welding equipment. The high current capability reduces the need for paralleling devices in many applications, simplifying design and improving reliability.
Consider this device for 5-10kW applications to avoid device paralleling.
How does this compare to using two 40A MOSFETs in parallel?
Using a single 78A device vs two 40A devices: Simpler gate drive (single device); No current sharing concerns; Lower total Rds(on) due to larger die; Better thermal performance (single junction); Potentially lower cost than two devices with associated components. The single device approach is generally preferred unless redundancy is required.
Use single high-current device unless redundancy or thermal distribution requires paralleling.