SCT3040KL
1200V 40A trench-gate SiC MOSFET featuring 40mΩ Rds(on) in TO-247-4L package, optimized for high-efficiency 800V EV applications.
Product Overview
Description
The SCT3040KL is a 1200V 40A Silicon Carbide MOSFET featuring ultra-low 40mΩ on-resistance. This device is designed for high-efficiency 800V EV applications including traction inverters, onboard chargers, and DC-DC converters where maximum efficiency is critical.
The trench-gate technology delivers industry-leading low Rds(on) with excellent switching performance. The TO-247-4L package with Kelvin source connection enables fast switching and reduced switching losses. The device is fully AEC-Q101 qualified for automotive applications.
With its ultra-low on-resistance and easy gate drive compatibility, the SCT3040KL enables system designers to achieve maximum efficiency in 800V EV powertrain applications.
Product Series
SCT Series
Primary Application
800V EV traction inverters
Key Features
- 1200V blocking voltage
- 40A continuous drain current
- Ultra-low Rds(on) = 40mΩ typical
- Trench-gate technology
- TO-247-4L with Kelvin source
- 175°C maximum junction temperature
- AEC-Q101 qualified
Specifications
| Voltage Rating | 1200V |
|---|---|
| Current Rating | 40A |
| Rds(on) | 40mΩ |
| Temperature Range | -40°C to +175°C |
| Package | TO-247-4L |
Applications
800V EV traction inverters
Automotive and EV electronics
Onboard chargers
Battery and charging management
DC-DC converters
Power conversion and supply
High-voltage industrial drives
Motor drive and control systems
FAE Expert Insights
"The SCT3040KL offers the best Rds(on) in Rohm's 1200V portfolio at 40mΩ. This makes it ideal for high-efficiency 800V EV applications where every milliohm matters. For traction inverters, the lower Rds(on) directly translates to higher efficiency and less cooling requirements. The device has been proven in multiple automotive platforms with excellent field reliability. Highly recommended for premium EV applications where efficiency is paramount."
Lowest Rds(on) 1200V SiC MOSFET for maximum efficiency
— David Wang, BeiLuo
Frequently Asked Questions
What makes SCT3040KL ideal for 800V EV applications?
SCT3040KL advantages for 800V EV: (1) Lowest Rds(on) - 40mΩ minimizes conduction losses. (2) 1200V rating - Safe for 800V battery systems. (3) High efficiency - 98%+ achievable in traction inverters. (4) Automotive qualified - AEC-Q101 Grade 0. (5) Proven reliability - Mass production track record. (6) Easy gate drive - Compatible with standard drivers. (7) Thermal performance - Low losses reduce cooling needs. Best choice for premium EV powertrain applications.
Choose SCT3040KL for maximum efficiency in 800V EV traction and OBC applications.
How does SCT3040KL compare to SCT3080KL?
SCT3040KL vs SCT3080KL comparison: (1) Rds(on) - 40mΩ vs 80mΩ (50% lower). (2) Current - Optimized for 40A vs 80A. (3) Efficiency - Higher due to lower Rds(on). (4) Cost - Higher due to larger die. (5) Applications - SCT3040KL for high-efficiency traction, SCT3080KL for OBC/DC-DC. (6) Thermal - Lower losses with SCT3040KL. (7) Selection - Use SCT3040KL when efficiency is critical, SCT3080KL for cost-sensitive designs.
Use SCT3040KL for traction inverters; SCT3080KL for OBC and DC-DC converters.
What gate drive is recommended for SCT3040KL?
SCT3040KL gate drive requirements: (1) Voltage - +18V turn-on, 0V turn-off. (2) Current - 5A peak minimum for fast switching. (3) Isolation - 2500Vrms for 800V systems. (4) Desaturation - Recommended for protection. (5) Miller clamp - Helps prevent false turn-on. (6) Options - Rohm BM6104FV, TI UCC21732. (7) PCB - Minimize gate loop inductance. Standard 1200V SiC gate drivers work well with this device.
Use isolated 18V gate driver with desaturation protection and Miller clamp.
Can SCT3040KL be used for paralleled operation?
SCT3040KL parallel operation: (1) Positive tempco - Good current sharing characteristics. (2) Symmetry - Equal trace lengths essential. (3) Gate drive - Common gate resistor for each device. (4) Current sharing - 2-4 devices can be paralleled. (5) Applications - 300kW+ traction inverters. (6) Thermal - Consider thermal coupling between devices. (7) Support - FAE guidance available. Parallel operation enables ultra-high power applications with excellent current sharing.
Can parallel 2-4 devices for ultra-high power traction inverters >300kW.
What thermal management is needed for SCT3040KL?
SCT3040KL thermal design: (1) Rth(j-c) - 0.45°C/W typical. (2) At 30A: Pcond = 36W. (3) Switching losses - 15W at 50kHz. (4) Total - ~50W at full load. (5) Heatsink - Rth(s-a) < 1.5°C/W with forced air. (6) Interface - High-performance thermal grease. (7) Target - Tj < 150°C for automotive reliability. Lower losses than higher Rds(on) devices reduce thermal management requirements.
Use forced air cooling; design for Tj < 150°C for automotive lifetime.
What is the typical efficiency improvement with SCT3040KL?
SCT3040KL efficiency benefits: (1) Traction inverter - 98.5% vs 97% with IGBT. (2) OBC - 97% vs 95% with silicon. (3) DC-DC - 99% vs 97% with silicon. (4) Loss reduction - 50% lower conduction losses vs 80mΩ devices. (5) System impact - Smaller heatsink, lighter thermal management. (6) Range impact - 3-5% improvement in EV range. (7) Cost benefit - Lower cooling costs offset device cost. The efficiency gains translate to real system benefits.
Expect 1-2% system efficiency improvement vs higher Rds(on) alternatives.