Infineon Technologies IAUCN04S7N009ATMA1

Overview

IAUCN04S7N009ATMA1 from Infineon Technologies is an N-channel enhancement-mode automotive power MOSFET in the OptiMOS™ 7 family, rated for 40 V V_DS, 0.96 mΩ R_DS(on) at V_GS = 10 V and I_D = 88 A, with 268 A chip-limited continuous drain current and 175 °C maximum junction temperature. It serves as a high-efficiency main switch in 12 V automotive power distribution systems such as battery disconnect, load switching, and motor control.

For engineers reviewing the IAUCN04S7N009ATMA1 datasheet, IAUCN04S7N009ATMA1 pinout, IAUCN04S7N009ATMA1 application, or IAUCN04S7N009ATMA1 equivalent, key selection criteria include its AEC-Q101 qualification, MSL1 reflow capability up to 260 °C, 100% single-pulse avalanche testing, low gate charge (Q_g = 74 nC max), and robust thermal resistance (R_thJC = 0.6 K/W min).

Technical Context

This device implements a trench-based silicon MOSFET architecture optimized for low conduction and switching losses in 12 V automotive systems. Its gate threshold voltage (2.2–3.0 V) enables reliable drive from standard 3.3 V/5 V microcontrollers, while the 4.2 V gate plateau voltage supports stable Miller region control during hard-switching transitions.

The integrated body diode features 40–60 ns reverse recovery time and 31–63 nC Q_rr, enabling efficient freewheeling in synchronous rectification and H-bridge motor drives. Thermal design is supported by a low R_thJC of 0.6 K/W and operation up to 175 °C ambient-referenced case temperature.

Key Specifications

Pinout & Package

IAUCN04S7N009ATMA1 is housed in PG-TDSON-8-34, a thermally enhanced 8-pin exposed-drain DSO package with 3.4 mm × 3.3 mm footprint and 0.65 mm pitch. The top-side exposed drain pad provides low-inductance, high-current path and primary thermal conduction path to PCB copper.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive power MOSFET applications.

Compared with IAUZ40N04S5L027ATMA1, IAUCN04S7N009ATMA1 delivers 64% lower conduction loss and 91% higher avalanche energy, making it suitable for safety-critical 12 V power distribution. Versus IPB180N04S4H5ATMA1, it trades 0.51 mΩ lower R_DS(on) for guaranteed automotive qualification and smaller PG-TDSON-8-34 footprint.

Availability

IAUCN04S7N009ATMA1 is available at Aetrix Electronics and suitable for automotive battery management, electric power steering, and start-stop system designs requiring stable component supply across multi-year vehicle production lifecycles.

Supply support for IAUCN04S7N009ATMA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and security solutions, with global manufacturing and R&D infrastructure.

This part belongs to the OptiMOS™ 7 automotive power MOSFET product line, engineered specifically for high-current, high-reliability 12 V battery system switching in safety-critical ADAS, powertrain, and chassis applications.

FAQ

What is the maximum continuous drain current for IAUCN04S7N009ATMA1 under real-world PCB conditions?

The datasheet specifies 268 A as chip-limited current, but practical continuous current depends on PCB thermal design. With a 2s2p FR4 board per JEDEC JESD51-7, the DC current is limited to 175 A at T_C = 100 °C. For sustained 200+ A operation, a 4-layer board with ≥2 oz copper and thermal vias to internal ground planes is required to maintain T_j ≤ 175 °C.

Does IAUCN04S7N009ATMA1 support gate drive from a 3.3 V microcontroller without level shifting?

No. Its gate threshold voltage range is 2.2–3.0 V, but full enhancement requires V_GS ≥ 7 V for R_DS(on) ≤ 1.20 mΩ. A 3.3 V GPIO cannot reliably turn the device fully on; a dedicated gate driver IC (e.g., 1EDN7512B) or discrete level shifter is mandatory to achieve specified on-resistance and avoid thermal runaway.

How does the 100% avalanche test impact system-level reliability in motor control applications?

Each unit undergoes single-pulse avalanche stress at 39 mJ, verifying ability to absorb inductive energy during MOSFET turn-off in inductive loads like motors. This eliminates latent failures from repetitive unclamped inductive switching, directly improving field failure rates in EPS and HVAC blower systems where di/dt exceeds 100 A/µs.

Can IAUCN04S7N009ATMA1 be used in parallel configurations for >300 A applications?

Yes, but with strict layout and gate drive matching. The device's positive temperature coefficient of R_DS(on) above 25 °C enables inherent current sharing. Parallel operation requires matched gate resistors (<5% tolerance), symmetrical PCB trace lengths, and shared source Kelvin connection to avoid oscillation. Derate total current by 15% for thermal imbalance in production units.