Automotive MOS FETS (20V to 800V) Next-generation automotive MOS FETS that achieve high efficiency and reliability

Infineon Technologies AG

Product overview

Infineon's automotive MOS FETS are a product group that supports a wide voltage range from 30V to 800V and combines low on-resistance, high SWITCHES performance, and excellent thermal characteristics. They are AEC-Q101 qualified and are ideal for automotive applications such as EV/HEV battery management, DC-DC CONVERTERS, motor control, electric pumps and fans.
Advanced packaging technologies (OptiMOS™, CoolMOS™, TOLL, D²PAK, etc.) offer greater design flexibility and improved reliability. Adopted by automakers and Tier 1 suppliers around the world, our products contribute to accelerating the adoption of in-vehicle electrification.

Process technology portfolio and roadmap

List of main features and specifications

Voltage range: 30V~800V
Rds(on): Ultra-low on-resistance (e.g., 1.0 mΩ or less)
Package: TOLL, D²PAK, DPAK, SOT-223, LFPAK, etc.
Certification: AEC-Q101 compliant, PPAP compatible
Features: fast SWITCHES, low gate charge, excellent thermal performance
Compatible apps: EV/HEV, ADAS, electric pumps, fans, BMS, DC-DC converters

Main product range

■ 30V to 40V range: OptiMOS™ 7 40V series
IAUCN04S7N040
A 40V MOS FETS that combines ultra-low on-resistance and high SWITCHES performance. The SSO8 package achieves compact size and high efficiency, making it ideal for low-voltage automotive applications such as EPS and window lifters.

■ 55V to 60V range: OptiMOS™ 6/7 60V series
IAUCN06S6N060
Highly reliable MOS FETS with 60V rating. With low RDS(on) and excellent thermal performance, it is suitable for smart power distribution units and active suspension control.

■ 75V to 100V range: OptiMOS™ 5/7 80V series
IAUTN08S5N017
High-performance MOS FETS with 80V withstand voltage. TOLL package allows for high current, making it ideal for safety systems such as electric brakes and steering control. AEC-Q101 compliant.

■ 120V to 300V range: OptiMOS™ 5/6 150V series
IAUTN15S6N030
Achieves high power density with 150V withstand voltage. sTOLL package makes it ideal for DC-DC CONVERTERS and electric powertrains. Combines high efficiency and robustness.

■ 600V to 800V band: CoolMOS™ C3A / CFD7A series
IRF3CMS17N80
800V Super Junction MOS FETS. Low loss and high speed SWITCHES make it ideal for on-board chargers and high voltage DC-DC applications. Also suitable for high temperature operation.

For detailed technical information, please visit the Infineon website.

Benefits of implementation

problems	solution
Concerns about thermal runaway	Excellent thermal properties improve heat dissipation efficiency
Space Constraints	Small, high-performance package increases design freedom
High current capacity	Low Rds(on) minimizes power loss
Reliability Requirements	AEC-Q101 certification ensures automotive quality
Reduced design man-hours	Providing a wide range of design support tools and technical materials

Use cases and implementation examples

Use Case 1: EV Battery Management System (BMS)

[Use case overview]
EV BMS must monitor and control the voltage, current, and temperature of battery cells with high precision. MOS FETS are used for cell balancing, charge/discharge control, and protection circuits, and require reliability and efficiency.

[Major features]
800V compatible high voltage MOS FETS: Compatible with high voltage batteries
Low on-resistance (Rds(on)): Minimizes power loss and reduces heat generation
High-speed SWITCHES performance: Improved cell balancing accuracy
AEC-Q101 certification: Guarantees automotive quality

Use case 2: Electric fan/pump control

[Use case overview]
Automotive cooling systems (radiator fans, water pumps, etc.) require efficient motor control.
MOS FETS are used to adjust rotation speed and current through PWM control.

[Major features]
High-speed SWITCHES: Ideal for PWM control
Low gate charge (Qg): Reduces power consumption of the driver circuit
Small packages (TOLL, LFPAK, etc.): Addresses space constraints
Excellent thermal performance: Stable operation even in high temperature environments

Use Case 3: DC-DC CONVERTERS (Automotive POWER SUPPLIES)

[Use case overview]
DC-DC CONVERTERS are essential for automotive systems as they generate various voltages from 12V/48V systems. As MOS FETS are SWITCHES elements, efficiency and EMI countermeasures are important.

[Major features]
Low on-resistance + high frequency SWITCHES: Achieves high efficiency conversion
CoolMOS™ technology: EMI reduction and optimized SWITCHES losses
AEC-Q101 Certified: Peace of mind for automotive POWER SUPPLIES designs
Various packages: ensures design flexibility