IAUA180N04S5N012AUMA1 - 40V 180A OptiMOS-5 N-MOSFET | Infineon
MPN: IAUA180N04S5N012AUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.07 | $30.70 |
| 100 | $2.74 | $274.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.18 | $2,180.00 |
| 3,000 | $1.96 | $5,880.00 |
IAUA180N04S5N012AUMA1 Overview
A power MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) is a voltage-controlled switch used to efficiently route or switch current in power-conversion circuits. Power MOSFETs sit in the broader semiconductor taxonomy as discrete transistors -> FETs -> MOSFETs -> power MOSFETs. The 40 V class is commonly used in 12 V automotive subsystems where load-dump transients can drive rails up to 35-40 V, requiring headroom beyond the nominal bus voltage.
Key features include the OptiMOS-5 trench technology that minimises R_DS(on) x Qg figure-of-merit, a low 1.2 mΩ on-resistance that reduces conduction losses, and a 56 mm² footprint (7x8 mm² sTOLL) that is smaller than the legacy DPAK (65 mm²). The device is qualified to AEC-Q101, supports 100% R_g-tested avalanche, and integrates a monolithic body diode for hard-switching topologies.
The sTOLL (MO-319A / IEC HSOF-5) leadless package provides a top-side thermal pad for low thermal resistance and excellent solder-joint reliability, while the 5-pin layout enables source-sense and gate-drive Kelvin connections. The low FOM allows high-frequency switching up to several hundred kHz in synchronous-rectifier and ORing applications.
Typical applications include 12 V automotive electric power steering (EPS), brushless DC motor drives, battery disconnect switches, eFuse and high-side load switches, and 48 V -> 12 V DC-DC converters. The high inrush capability also makes it suitable for hot-plug and reverse-battery protection circuits.
When designing with this device, prioritise Kelvin-source connection to the gate driver to suppress common-source inductance, and use a TVS clamp on the gate to limit VGS below ±20 V. Thermal design should assume worst-case R_DS(on) at hot Tj and apply sufficient PCB copper or an external heat spreader.
This page synthesises distributor pricing, drop-in alternatives, and practical design notes for IAUA180N04S5N012AUMA1 not found in the manufacturer datasheet, optimised for engineers evaluating Infineon OptiMOS-5 40 V parts for automotive power designs.
Drop-in alternatives for IAUA180N04S5N012AUMA1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with IAUA180N04S5N012AUMA1 (same form factor and footprint) — differing in Package, Automotive Qualification, MSL Level, Series, Technology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
IAUC120N04S6N009ATMA1
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$1.6 / Unit
View Datasheet →IAUCN04S7N037GATMA1
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View Datasheet →IAUCN04S7L050HATMA1
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$0.83 / Unit
View Datasheet →IAUCN04S7N027GATMA1
✅ Drop-In✓ In Stock
$0.72 / Unit
View Datasheet →IAUCN04S7N019GATMA1
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$0.82 / Unit
View Datasheet →IPC100N04S5L1R5ATMA1
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$1.18 / Unit
View Datasheet →IAUC60N04S6L030HATMA1
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$0.94 / Unit
View Datasheet →IPC100N04S5L5R5ATMA1
✅ Drop-In📋 Reference alternative (not in catalog)
IAUA180N04S5N012AUMA1 Maximum Ratings & Electrical Characteristics
| Manufacturer | Infineon Technologies |
| Part Number | IAUA180N04S5N012AUMA1 |
| Series | OptiMOS-5 40 V |
| FET Type | N-Channel |
| Drain-Source Voltage (VDS) | 40 V |
| Continuous Drain Current (ID) | 180 A (Tc) |
| Maximum Power Dissipation (PD) | 125 W (Tc) |
| R_DS(on) (max) | 1.2 mΩ at 10 V VGS |
| Gate-Source Voltage (VGS) max | ±20 V |
| Package | PG-HSOF-5-2 (sTOLL, MO-319A / HSOF-5), 7x8 mm² |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -55 °C to +175 °C (Tj) |
| Technology | OptiMOS-5 Trench |
| Automotive Qualification | AEC-Q101 |
| RoHS Status | Compliant |
IAUA180N04S5N012AUMA1 Pin Configuration
| Pin 1 | Drain / Thermal Pad — Main drain connection and top-side thermal pad (exposed pad) |
| Pin 2 | Source — Source connection (power return) |
| Pin 3 | Source — Source connection (power return) |
| Pin 4 | Gate — Gate input for drive signal |
| Pin 5 | Kelvin Source — Kelvin-source connection for gate driver return |
Safe Operating Area (DC)
Typical Applications
IAUA180N04S5N012AUMA1 is suitable for 7 applications: 12V Automotive Electric Power Steering (EPS), Battery Disconnect Switch (BDU) and eFuse, BLDC Motor Drive (Automotive 12V Pumps, Fans), 48V-to-12V DC-DC Converter (Synchronous Rectifier), Hot-Plug / Reverse-Battery Protection, High-Side Load Switch (Body Control Module), USB-C / High-Power Charging Port Switch.
12V Automotive Electric Power Steering (EPS)
The IAUA180N04S5N012AUMA1 is a strong fit for 12 V automotive electric power steering (EPS) motor drives because of its 40 V VDS headroom above the 12 V bus, 180 A continuous ID for peak torque transients, and AEC-Q101 qualification. In a typical three-phase BLDC EPS inverter, the part is used as the low-side FET in a half-bridge; its 1.2 mΩ R_DS(on) minimises I²R losses during high-current steering assist, which directly improves efficiency and reduces thermal stress. The OptiMOS-5 technology's low Qg/Qrr also supports PWM frequencies up to 50 kHz without significant switching loss penalty, while the sTOLL footprint keeps the inverter PCB compact.
Recommended
Battery Disconnect Switch (BDU) and eFuse
In battery disconnect units (BDU) and electronic fuses (eFuse), the IAUA180N04S5N012AUMA1 provides a 180 A-rated, 40 V-rated solid-state switch in a 7x8 mm² sTOLL footprint. Its 1.2 mΩ R_DS(on) keeps continuous conduction loss under 22 W at 180 A, manageable with proper PCB copper. The 40 V VDS rating handles load-dump transients on 12 V automotive rails with ample margin. Designers use the part's low R_DS(on) and avalanche-rated body diode to disconnect the battery during crash events, with built-in reverse-battery protection by back-to-back configuration.
Recommended
BLDC Motor Drive (Automotive 12V Pumps, Fans)
The IAUA180N04S5N012AUMA1 suits 12 V brushless DC motor drives for automotive water pumps, oil pumps, and cooling fans. With 180 A ID and 125 W PD, the part easily handles the inrush and stall currents of 12 V BLDC motors. The low R_DS(on) x Qg OptiMOS-5 figure-of-merit keeps switching losses low at 25-50 kHz PWM, enabling a compact inverter without external heat sinks. The sTOLL top-side thermal pad couples efficiently to PCB copper or an aluminium DBC substrate, maintaining Tj below 150 °C in sealed engine-compartment environments.
Recommended
48V-to-12V DC-DC Converter (Synchronous Rectifier)
In 48 V mild-hybrid DC-DC converters that step down to 12 V, the IAUA180N04S5N012AUMA1 functions as the secondary-side synchronous rectifier on the 12 V output. Its 40 V VDS rating is sufficient because the reflected voltage on the secondary is well below 40 V, and the 1.2 mΩ R_DS(on) minimises conduction loss on the high-current 12 V output (often 200-400 A total, shared across paralleled FETs). The OptiMOS-5 low Qrr reduces body-diode reverse-recovery loss, critical for high-frequency (>200 kHz) topologies such as LLC or phase-shifted full-bridge converters.
Recommended
Hot-Plug / Reverse-Battery Protection
The IAUA180N04S5N012AUMA1 is well-suited to hot-plug and reverse-battery protection circuits in 12 V automotive ECUs. The 40 V VDS rating tolerates transients during plug-in events, while the 1.2 mΩ R_DS(on) limits steady-state voltage drop to <50 mV at 40 A. Two devices in back-to-back configuration block both forward and reverse current paths until an MCU-driven gate driver enables the circuit. The AEC-Q101 qualification makes it acceptable for safety-relevant automotive modules that must pass reverse-polarity tests per ISO 16750-2.
Recommended
High-Side Load Switch (Body Control Module)
In automotive body control modules (BCM) and zone controllers, the IAUA180N04S5N012AUMA1 serves as a high-current high-side switch for loads such as seat heaters, defrosters, and auxiliary lighting. The 180 A ID rating exceeds typical BCM load requirements, providing margin for inrush. The 1.2 mΩ R_DS(on) keeps voltage drop low, preserving load voltage under high current. The sTOLL package supports high-density BCM PCB layouts, and the AEC-Q101 qualification allows the part to be used in modules that must pass automotive EMC and environmental stress tests.
Recommended
USB-C / High-Power Charging Port Switch
In automotive USB-PD charging ports delivering up to 100 W (20 V/5 A), the IAUA180N04S5N012AUMA1 can serve as the VBUS protection switch on the 12 V supply rail before the buck converter. Its 40 V VDS rating handles 12 V load-dump safely, and the 180 A ID supports the inrush of downstream buck converter input capacitors. The 1.2 mΩ R_DS(on) keeps conduction loss below 1.5 W at 30 A continuous charging load. The sTOLL footprint allows co-location with the buck converter in a compact USB-PD module housing.
Recommended
Recommended Products Summary
Engineering reference data for IAUA180N04S5N012AUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | IAUC120N04S6N009ATMA1 | IAUCN04S7N037GATMA1 | IPC100N04S5L1R5ATMA1 | IAUCN04S7N019GATMA1 |
|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon |
| Package | PG-HSOF-5-2 (sTOLL, 7x8 mm²) | PG-HSOF-5-2 (sTOLL) - same | PG-HSOF-5-2 (sTOLL) - same | PG-HSOF-5-2 (sTOLL) - same | PG-HSOF-5-2 (sTOLL) - same |
| VDS (Drain-Source Voltage) | 40 V | 40 V | 40 V | 40 V | 40 V |
| R_DS(on) max at 10V VGS | 1.2 mΩ | 0.9 mΩ | 3.7 mΩ | 1.5 mΩ | 1.9 mΩ |
| Generation / Technology | OptiMOS-5 40V | OptiMOS-5 40V | OptiMOS-7 40V | OptiMOS-5 40V | OptiMOS-7 40V |
| Automotive Qualification | AEC-Q101 | AEC-Q101 | AEC-Q101 | AEC-Q101 | AEC-Q101 |
Key Differentiators
- Lowest R_DS(on) in the 40 V sTOLL family (vs IAUCN04S7N037GATMA1)
- 180 A ID exceeds other 40 V sTOLL alternatives (vs IPC100N04S5L1R5ATMA1)
- Smallest footprint among 40V automotive MOSFETs (vs DPAK (legacy))
Design Notes
Estimated: at continuous 180 A drain current with 1.2 mΩ R_DS(on) at hot Tj (approx 2x cold value), conduction loss is approximately 78 W. The PG-HSOF-5-2 (sTOLL) package has a top-side thermal pad requiring at least 100 mm² of inner-layer copper plus 4 thermal vias to a bottom-side spreader to keep Tj below 150 °C in a 105 °C ambient. For sealed enclosures, consider an aluminium DBC substrate or external heat sink to extend SOA margin.
Connect the gate driver return (Kelvin source, pin 5) directly to the gate-driver ground reference, NOT to the power source plane. This suppresses common-source inductance ringing caused by high di/dt in the power loop. Place the gate driver within 10 mm of pins 4/5 to minimise gate-loop inductance. Use a TVS diode (e.g., 16 V SMBJ) on the gate-source pair to clamp any VGS overshoot below the ±20 V absolute maximum.
Do not parallel multiple IAUA180N04S5N012AUMA1 devices without per-device source resistors (typically 10-100 mΩ) to ensure current sharing - the R_DS(on) is low enough that minor mismatch can cause thermal runaway. Also avoid driving VGS above ±20 V (use a gate-source Zener or TVS clamp) and remember that the body diode has limited reverse-recovery - for hard-switched topologies pair with an SiC Schottky or external synchronous rectifier.
The OptiMOS-5 family has low Qrr but switching transients at 100 kHz+ in a 12 V EPS inverter can still produce significant EMI on the motor phase lines. Add a 100 nF X7R snubber between each phase and DC+ to slow the dv/dt. Keep the high-current loop (DC+, FET drain, FET source) area below 50 mm² to minimise radiated EMI.
Compliance Information
AEC-Q101 (not AEC-Q100) qualified per Infineon datasheet. AEC-Q101 is the standard for discrete semiconductors, while AEC-Q100 covers ICs - both are recognised automotive standards.
