BSP742RIXUMA1 - 400mA Smart High-Side Switch 41V | Infineon
MPN: BSP742RIXUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.65 | $1.65 |
| 10 | $1.48 | $14.80 |
| 100 | $1.32 | $132.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $1.05 | $1,050.00 |
| 2,500 | $0.96 | $2,400.00 |
Drop-in alternatives for BSP742RIXUMA1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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View Datasheet →BSP742RIXUMA1 Maximum Ratings & Electrical Characteristics
| Product Type | Smart High-Side Power Switch |
| Topology | 1:1 N-Channel High-Side |
| Family | miniPROFET |
| Output Current (Nominal) | 400 mA |
| RDS(on) Typical at 25°C | 250 mΩ |
| Operating Supply Voltage | 5 V to 34 V |
| Load Dump Tolerance | 41 V |
| Reverse Battery Protection | -16 V |
| Thermal Shutdown | Yes with auto restart |
| Overvoltage Protection | Yes (including load dump) |
| Short Circuit Protection | Yes |
| Open Load Detection | Yes (diagnostic pin) |
| Demagnetization of Inductive Loads | Yes (internal) |
| Package | PG-DSO-8-6 (SOIC-8, 3.90 mm body) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40 °C to +150 °C |
| RoHS Status | Compliant |
BSP742RIXUMA1 Pin Configuration
| Pin 1 | OUT — Power output to load |
| Pin 2 | Vbb — Supply voltage (battery) |
| Pin 3 | GND — Ground |
| Pin 4 | IN — Logic input (active high) |
| Pin 5 | DEN — Diagnostic enable |
| Pin 6 | ST/DIAG — Status / diagnostic output |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | NC — Not connected (per datasheet) |
Safe Operating Area (high-side switch)
Typical Applications
BSP742RIXUMA1 is suitable for 6 applications: 12V Automotive Body Electronics, Industrial 24V PLC Output Modules, Solenoid and Relay Drivers, LED Driver and Indicator Lamps, USB Port Power Switching, Small DC Motor and Fan Drivers.
12V Automotive Body Electronics
The BSP742RIXUMA1 fits 12 V automotive body-electronics loads such as door-lock actuators, mirror heaters, and small indicator lamps up to 400 mA. Its 250 mΩ RDS(on) typical keeps conduction loss near 40 mW at full load, eliminating heatsinking, while the integrated overvoltage protection tolerates 41 V load-dump transients defined in ISO 7637-2. The diagnostic pin reports open-load and overtemperature faults to the body-control MCU, enabling OBD-II compliance. According to Infineon application notes, placing the device near the load with short GND and Vbb traces keeps the inductive demagnetization path inside the die. Companion products typically include a small automotive MCU and the BTS462TATMA1 for higher-current rails.
Recommended
Industrial 24V PLC Output Modules
In 24 V industrial PLC digital-output modules, the BSP742RIXUMA1 protects the backplane from field-side shorts and overloads up to 400 mA per channel. Its 5-34 V supply range covers both 12 V and 24 V PLC rails without derating, and the integrated current limitation plus thermal shutdown with auto-restart eliminates the need for per-channel fuses. Diagnostic feedback supports predictive maintenance and channel-fault annunciation to the PLC CPU. The exposed pad on the SOIC-8 package should be soldered to ≥1 cm² copper pour to sustain 400 mA continuous at 85°C ambient. Companion devices include the IFX007TAUMA1 half-bridge for bidirectional loads and ISO-rated digital isolators for the field-bus interface.
Recommended
Solenoid and Relay Drivers
The BSP742RIXUMA1 is a strong fit for driving small 12 V/24 V solenoids and relays in HVAC, white-goods, and access-control systems where peak inrush can reach 1-2 A but steady-state holding stays under 400 mA. Its internal fast-demagnetization path absorbs the inductive kickback without an external flyback diode, simplifying PCB layout and reducing BOM. The thermal-shutdown-with-restart behavior handles stalled-actuator faults gracefully. Mount the SOIC-8 with the exposed pad soldered to a moderate copper pour (≥1 cm²) to handle the repetitive inrush heating. A freewheeling path is already integrated, so designers only need to add a TVS if the cable length exceeds 1 m.
Recommended
LED Driver and Indicator Lamps
For 12 V LED strings up to 400 mA (typical automotive interior lighting, status indicators, and signage), the BSP742RIXUMA1 provides a regulated constant-current path via external sense resistor plus PWM dimming on the input pin. The 250 mΩ RDS(on) keeps the high-side switch dissipation below 40 mW, enabling fanless sealed-luminaire designs. Open-load detection flags burned-out LED strings to the host MCU, supporting ISO 26262 functional-safety diagnostics in automotive instrument panels. The 41 V load-dump tolerance protects against jump-start transients common in vehicle electrical systems. Pair with a small MCU such as the XC800 family for PWM generation and a current-sense resistor for closed-loop brightness control.
Recommended
USB Port Power Switching
The BSP742RIXUMA1 is well suited as a protected 5 V high-side switch for USB-A downstream ports on automotive head units and industrial HMI panels. Its 5 V minimum operating voltage matches USB VBUS directly, and 400 mA continuous aligns with USB 2.0/3.0 downstream port power budgets. Integrated current limitation enforces the USB-IF inrush specification, while thermal shutdown protects against VBUS shorts. Diagnostic feedback allows the host controller to detect and report overcurrent events to the operating system. Add a 22 µF/10 µF VBUS capacitor pair on the load side and a TVS for ESD compliance per IEC 61000-4-2. Companion products include the PD controller for higher-power USB-PD roles.
Recommended
Small DC Motor and Fan Drivers
For 12 V/24 V brushless DC fans and small DC motors under 400 mA (CPU cooling fans, instrument-cluster blowers), the BSP742RIXUMA1 provides protected high-side drive with PWM speed control via the input pin. Internal demagnetization handles the motor's back-EMF without an external flyback diode, and thermal shutdown prevents rotor-lock damage. The exposed pad should be soldered to ≥1 cm² copper to absorb startup inrush heating. The diagnostic pin can detect stalled-rotor conditions when the motor draws sustained current above the nominal limit. Pair with a tachometer input on the MCU for closed-loop speed regulation, and with the BTS3046SDRATMA1 for higher-current fans above 600 mA.
Recommended
Recommended Products Summary
Engineering reference data for BSP742RIXUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BTS3046SDRATMA1 | BTS3110NHUMA1 | BTT60302ERAXUMA1 |
|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon (different package) |
| Package | PG-DSO-8-6 (SOIC-8) | PG-DSO-8-6 (SOIC-8) - same | PG-DSO-8-6 (SOIC-8) - same | PG-TDSO-14 - different |
| Continuous Output Current | 400 mA | ~600 mA | ~400 mA | [DATA_NEEDED] |
| RDS(on) Typical | 250 mΩ | Lower than BSP742R | Comparable | [DATA_NEEDED] |
| Operating Voltage | 5 V to 34 V | Similar 5-34 V class | Similar 5-34 V class | [DATA_NEEDED] |
| Load Dump Tolerance | 41 V | Similar 41 V class | Similar 41 V class | [DATA_NEEDED] |
| Reverse Battery Protection | -16 V | Similar PROFET family | Similar PROFET family | [DATA_NEEDED] |
| Diagnostic Pin | Yes (open-load, thermal) | Yes (PROFET family) | Yes (PROFET family) | Yes |
| Family | miniPROFET | PROFET | PROFET | PROFET (multi-channel) |
Key Differentiators
- miniPROFET family integration of all key protections (vs BTS3110NHUMA1)
- Single-channel simplicity in compact SOIC-8 (vs BTT60302ERAXUMA1)
- Diagnostic feedback at 400 mA-class (vs BTS3046SDRATMA1)
Design Notes
At full 400 mA continuous load the BSP742RIXUMA1 dissipates approximately 40 mW (P = I² × R = 0.4² × 0.25). While this is modest, sustained operation in a sealed enclosure at 85°C ambient requires the SOIC-8 exposed pad to be soldered to ≥1 cm² of copper pour on the top layer (plus thermal vias to inner planes if available) to keep junction rise under 30°C. Estimated: with 1 cm² copper on JEDEC EIA/JESD51 1s board, theta_JA ≈ 150°C/W → ΔTj ≈ 6°C at 400 mA. Without copper, junction rise can exceed 30°C and approach the thermal-shutdown threshold.
Do not exceed 34 V continuous on Vbb, even though load-dump transients to 41 V are tolerated for short durations per the Infineon datasheet. Sustained overvoltage will trigger the internal clamp and cause excess heating. Also avoid operating above 16 V in reverse-battery conditions - the -16 V reverse rating is a survival limit, not a continuous rating. Place a small 100 nF ceramic bypass on Vbb as close to the IC as possible, and keep the GND trace short and direct to the system ground plane to minimize ground bounce during demagnetization events.
Per Infineon application notes, route Vbb and OUT traces with at least 0.5 mm width per 100 mA, and stitch the exposed pad to the system GND plane with an array of thermal vias (0.3 mm drill, 0.6 mm pitch) for heat extraction. Keep the diagnostic trace short and away from switching nodes - capacitive coupling can cause false open-load flags. The IN pin is logic-level CMOS-compatible but is internally pulled low; add a 10 kΩ pull-down if the host MCU may tri-state during reset.
The diagnostic output (ST/DIAG) is an open-drain pin requiring an external pull-up resistor (typically 10 kΩ to Vlogic). During fast demagnetization of inductive loads, ringing on the OUT node can couple into the diagnostic pin through package and PCB parasitics; a small RC filter (100 kΩ + 1 nF) on the diagnostic pin suppresses false triggers. Reference the Infineon PROFET application note for recommended filter values per load profile.
Compliance Information
RoHS and REACH compliant per Infineon product page. Not AEC-Q100 qualified — for automotive applications requiring full AEC-Q100 grade, choose the BSP742R automotive variant instead.
