BTS70401EPAXUMA1 - 4.5A Smart High-Side Switch, PG-TSDSO-14
MPN: BTS70401EPAXUMA1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.66 | $16.60 |
| 100 | $1.42 | $142.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $1.05 | $1,050.00 |
BTS70401EPAXUMA1 Overview
A smart high-side switch (also called an intelligent power switch or IPS) is a type of power distribution switch that sits between a microcontroller and a resistive or inductive load (lamps, solenoids, motors, LEDs). Compared with discrete MOSFETs, a smart high-side switch integrates over-current, over-temperature, over-voltage, and reverse-battery protection, plus current sense and fault feedback, dramatically simplifying the ECU wiring harness and improving ASIL-rated functional safety.
Key features of the BTS70401EPAXUMA1 include a 4.5 A nominal load current, 0.019 Ohm typical on-state resistance, ReverSave capability for low power dissipation in reverse-polarity conditions, ISO 26262-ready documentation for safety-relevant systems, and AEC-Q100 Grade 1 qualification for automotive environments from -40 C to +125 C. The PROFET+2 family adds capacitive load switching, advanced short-circuit handling, and a precise analog current sense (IS pin) for load diagnostics.
The device is controlled via a 3.3 V / 5 V CMOS-compatible input pin and provides detailed status feedback through both digital and analog diagnostic outputs. The integrated gate driver, charge pump, and protection logic are built on Infineon's SMART7 process, which combines a robust vertical DMOS output stage with mixed-signal control on a single die. PG-TSDSO-14 with an exposed pad enables PCB-direct thermal dissipation at the typical 1-2 W continuous load dissipation of a single automotive channel.
Typical applications include automotive body electronics (door modules, seat controllers, mirror adjusters), interior and exterior LED lighting, 12 V relay and solenoid replacement, and zonal/zonal-ECU power distribution in next-generation vehicle electrical architectures. The PG-TSDSO-14 footprint supports high-density multi-channel PCBs found in BCMs and PDMs.
When designing with this part, derate load current with ambient temperature using the SOA curves from the Infineon datasheet, and respect the 1.2 W continuous dissipation on the standard 2-layer 1 oz PCB footprint with the exposed pad properly soldered and via-fanned-out. The IS pin requires an external sense resistor and must be left open or pulled high when unused.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet - helping engineers select the right PROFET+2 channel and avoid common PCB thermal pitfalls.
Drop-in alternatives for BTS70401EPAXUMA1 β 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 BTS70401EPAXUMA1 (same form factor and footprint) β differing in AEC-Q100 Qualification, Product Type.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
BTS70081EPAXUMA1
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$0.96 / Unit
View Datasheet βBTS70041EPAXUMA1
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
BTS70401EPAXUMA1 Maximum Ratings & Electrical Characteristics
| Product Type | Smart High-Side Power Switch |
| Technology Family | PROFET+2 (SMART7) |
| Number of Channels | 1 |
| Typical On-Resistance (RDSon) | 0.019 Ohm |
| Nominal Load Current | 4.5 A |
| Load Voltage Range | 3.5 V to 28 V (12 V nominal) |
| Operating Supply Voltage (VS) | 3.5 V to 28 V |
| Input Logic Level | CMOS 3.3 V / 5 V compatible |
| Reverse Battery Protection | ReverSave (integrated) |
| Current Sense Output (IS) | Yes (analog) |
| Diagnostic Feedback | Fault flag + analog IS pin |
| AEC-Q100 Qualification | Grade 1 (-40 C to +125 C) |
| Functional Safety | ISO 26262-ready |
| Package | PG-TSDSO-14-22 (14-pin, exposed pad) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
BTS70401EPAXUMA1 Pin Configuration
| Pin 1 | VS β Supply voltage (battery +) |
| Pin 2 | OUT β Power output to load |
| Pin 3 | IN β Logic input (3.3V/5V CMOS, controls channel state) |
| Pin 4 | IS β Current sense / analog diagnostic output |
| Pin 5 | GND β Ground |
| Pin 6 | VS β Supply voltage (battery +) |
| Pin 7 | OUT β Power output to load |
| Pin 8 | VS β Supply voltage (battery +) |
| Pin 9 | OUT β Power output to load |
| Pin 10 | DEN β Diagnostic enable (or fault flag depending on configuration) |
| Pin 11 | VS β Supply voltage (battery +) |
| Pin 12 | OUT β Power output to load |
| Pin 13 | NC β Not connected (per datasheet) |
| Pin 14 | VS β Supply voltage (battery +) |
| Pin 15 | DAP (exposed pad) β Thermal pad, connect to GND plane for heat dissipation |
Typical Applications
BTS70401EPAXUMA1 is suitable for 6 applications: Automotive Body Control Modules (BCM), Automotive LED Front and Rear Lighting, Solenoid and Relay Replacement, Zonal / Domain ECU Power Distribution, Industrial 24V PLC Digital Outputs, Battery Management System (BMS) Disconnect.
Automotive Body Control Modules (BCM)
The BTS70401EPAXUMA1's 4.5 A continuous rating, 0.019 Ohm RDS(on), and 12 V optimized protection profile make it a primary candidate for BCM outputs driving mirror adjusters, door lock actuators, and seat heaters. Its analog IS pin enables load-current telemetry that the BCM microcontroller reads via ADC to detect stuck actuators or partial shorts before they trip the protection. The PG-TSDSO-14 footprint allows dense PCB layouts in BCMs where 8-12 channels share a board. Compared with discrete MOSFET+shunt designs, the integrated over-temperature, over-current, and ReverSave functions reduce part count and improve ASIL-B functional safety compliance.
Recommended
Automotive LED Front and Rear Lighting
For 12 V automotive LED strings (DRL, tail, turn signal), the BTS70401EPAXUMA1 provides constant-current-friendly switching with PWM dimming via the input pin, plus precise IS-based fault detection that distinguishes open-LED from short-LED failures - critical for ISO 26262 lighting diagnostics. ReverSave protects the lamp driver board during jump-start polarity mistakes in service bays. The 4.5 A headroom covers multi-LED strings up to about 50 W at 12 V with proper PCB thermal design.
Recommended
Solenoid and Relay Replacement
In zonal ECUs replacing traditional relays with semiconductor switches, the BTS70401EPAXUMA1 drives 12 V solenoids, valves, and latch actuators up to 4.5 A directly from the microcontroller without flyback diodes or snubbers - the integrated inductive load handling clamps negative transients safely. Its analog IS output gives the ECU real-time solenoid current for diagnostics and PWM current control, while ReverSave eliminates external reverse-battery diodes that add voltage drop and heat.
Recommended
Zonal / Domain ECU Power Distribution
Next-generation zonal ECUs consolidate multiple fuse-and-relay functions into semiconductor power distribution. The BTS70401EPAXUMA1 fits as a single-channel protected output in zonal PDMs where each load (window lift, seat, mirror) needs individual current sense and fault isolation. The PG-TSDSO-14 footprint supports the compact, multi-channel PCBs of zonal modules, and ISO 26262-ready documentation helps OEMs build ASIL-B systems without additional qualification effort.
Recommended
Industrial 24V PLC Digital Outputs
In industrial 24 V PLC output modules, the BTS70401EPAXUMA1 (operating up to 28 V VS) provides one protected 24 V high-side switch per channel with full diagnostic feedback. Its analog IS pin enables open-load and short-circuit detection at 24 V logic levels, matching IEC 61131-2 industrial requirements. ReverSave and over-temperature protection increase MTBF in factory-automation cabinets where wiring faults and overloads are common.
Recommended
Battery Management System (BMS) Disconnect
In low-voltage 12 V BMS modules for auxiliary batteries or e-bike systems, the BTS70401EPAXUMA1 acts as a smart electronic fuse disconnecting the load on over-current or over-temperature, with IS-based current monitoring for state-of-charge calculation. ReverSave handles reverse-polarity connection without external fuses, and AEC-Q100 Grade 1 qualification ensures reliability in mobile battery environments.
Recommended
Recommended Products Summary
Engineering reference data for BTS70401EPAXUMA1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BTS70081EPAXUMA1 | BTS70041EPAXUMA1 |
|---|---|---|---|
| Package | PG-TSDSO-14-22 | PG-TSDSO-14-22 - same | PG-TSDSO-14-22 - same |
| Brand | Infineon | Infineon | Infineon |
| Nominal Load Current | 4.5 A | 4 A (-11%) | 4.5 A (same) |
| RDS(on) typical | 0.019 Ohm | 0.022 Ohm | 0.019 Ohm |
| Channels | 1 | 1 | 1 |
| Technology Family | PROFET+2 (SMART7) | PROFET+2 (SMART7) | PROFET+2 (SMART7) |
| Reverse Battery Protection | ReverSave | ReverSave | ReverSave |
| AEC-Q100 Grade | Grade 1 | Grade 1 | Grade 1 |
Key Differentiators
- Higher continuous current in same PROFET+2 package (vs BTS70081EPAXUMA1)
- Single-channel optimization for ASIL-B zonal ECUs (vs BTS70402EPGXUMA1)
- Full PROFET+2 diagnostic feature set (vs Discrete N-MOSFET + shunt design)
Design Notes
Estimated: at 4.5 A continuous load and RDS(on) of 0.019 Ohm, conduction loss is approximately 0.385 W. The PG-TSDSO-14 exposed pad should be soldered to a 2-layer 1 oz copper area of at least 1 cm^2 on the top layer and via-fanned to the bottom layer to keep junction-to-ambient thermal resistance around 35-40 C/W. Above 3 A continuous, derate to the SOA curve in the Infineon datasheet.
Place a 100 nF ceramic decoupling capacitor as close as possible to the VS pins (1, 6, 8, 11, 14) and a 10 uF electrolytic or ceramic on the battery rail within 1 cm. Keep the OUT trace wide and short (>= 2 mm) to minimize parasitic inductance that couples load-dump transients back into the device. The DAP (exposed pad) MUST be soldered to GND for proper thermal dissipation.
Do not connect the IS pin to a low-impedance load without a series sense resistor - the analog current-sense output is not a logic output. Do not leave the input (IN) pin floating; pull it to GND via 10 kOhm to keep the switch off during microcontroller reset. Do not exceed 28 V VS or apply a load-dump transient beyond the 35 V maximum ratings without an external TVS clamp.
Route the IN and DEN logic signals on an inner layer away from the OUT power trace to avoid capacitive coupling that can cause false fault flags. Keep the IS trace short and shielded by GND on both sides to preserve analog accuracy. Connect the DAP with a via array of at least 4-6 thermal vias (0.3 mm diameter) to the inner GND plane.
Compliance Information
AEC-Q100 Grade 1 qualified per Infineon datasheet. ISO 26262-ready documentation available. RoHS and REACH compliant per Infineon product page.
