BTS4142NHUMA1 - 1.4A 24V Smart High-Side Switch | Infineon
MPN: BTS4142NHUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.18 | $2.18 |
| 10 | $1.94 | $19.40 |
| 100 | $1.62 | $162.00 |
| 500 | $1.38 | $690.00 |
| 1,000 | $1.15 | $1,150.00 |
| 2,500 | $0.97 | $2,425.00 |
Drop-in alternatives for BTS4142NHUMA1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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View Datasheet →BTS4142NHUMA1 Maximum Ratings & Electrical Characteristics
| Product Type | Smart High-Side Power Switch (Classic PROFET 24V) |
| Number of Channels | 1 |
| Switch Topology | High-side, N-channel vertical MOSFET |
| Nominal Output Current | 1.4 A |
| On-State Resistance (RDS(on)) | 70 mOhm (typical) |
| Operating Supply Voltage | 6 V to 42 V |
| Load-Dump Protection | Yes (integrated overvoltage clamp) |
| Overload Protection | Yes (current limiting) |
| Thermal Protection | Yes (shutdown with auto-restart) |
| Undervoltage Shutdown | Yes (auto-restart with hysteresis) |
| ESD Protection (Input Pin) | Yes |
| Diagnostic Feedback | Yes (open-load, fault) |
| Package | PG-SOT223-4 |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +150C (junction) |
| RoHS Status | Compliant |
BTS4142NHUMA1 Pin Configuration
| Pin 1 | Vbb — Battery / supply voltage (6 V to 42 V); also connected to the tab thermal pad |
| Pin 2 | IN — Logic-level input (3.3 V / 5 V CMOS-compatible); HIGH turns on the output |
| Pin 3 | GND — Ground / logic reference |
| Pin 4 | OUT — Drain output to the load (high-side switch node) |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
BTS4142NHUMA1 is suitable for 6 applications: Automotive 24V LED Lighting, Relay and Solenoid Replacement, Industrial 24V Resistive Loads, Body Control Module (BCM) Outputs, HVAC Flap and Blower Control, Seat Heater Control.
Automotive 24V LED Lighting
The BTS4142NHUMA1 is purpose-built for 24 V automotive lighting, including rear combination lamps, daytime running lights, interior ambient LEDs, and turn-indicator clusters. Its 70 mOhm RDS(on) keeps conduction loss below 0.2 W at 1.4 A, so the PG-SOT223-4 package runs cool on standard 1 oz copper without an external heatsink. Integrated load-dump and ISO 7637-2 transient protection removes the TVS typically required with discrete MOSFETs, while the diagnostic feedback pin reports open-load failures to the body-control MCU - critical for ASIL-relevant lighting subsystems.
Recommended
Relay and Solenoid Replacement
In 24 V body and chassis modules the BTS4142NHUMA1 directly replaces electro-mechanical relays used for seat-heater control, HVAC flap motors, mirror adjusters, and door-lock solenoids. Replacing a relay with a solid-state high-side switch eliminates coil kickback, audible click, contact bounce, and arcing wear. The internal freewheeling clamp handles the inductive kick from typical 0.5-2 H solenoids, and the active current limit protects against jammed actuators - diagnostics flag the fault to the ECU.
Recommended
Industrial 24V Resistive Loads
Beyond automotive, the BTS4142NHUMA1 fits 24 V industrial PLC outputs, valve actuators, indicator lamps, and small heater loads. Its wide 6 V-42 V supply tolerance covers 24 V industrial bus rails with substantial transient margin. ESD protection on the logic input allows direct connection to 3.3 V or 5 V microcontroller GPIO without external protection components. Undervoltage lockout with auto-restart and hysteresis prevents chattering during brown-out conditions common in long-cable industrial installations.
Recommended
Body Control Module (BCM) Outputs
Within a body control module the BTS4142NHUMA1 typically drives each 24 V load via a dedicated channel controlled by the BCM microcontroller. The low quiescent current supports always-on standby without draining the battery, and the diagnostic pin enables the BCM to detect open-load, short-to-ground, and overtemperature events in real time. Multiple BTS4142NHUMA1 channels can be paralleled on the same PCB, sharing copper area for thermal relief and simplifying the BOM versus discrete MOSFET designs.
Recommended
HVAC Flap and Blower Control
In 24 V automotive HVAC systems the BTS4142NHUMA1 switches the small DC motors that drive mode-selector flaps and recirculation doors. Its integrated inductive-load clamp absorbs motor commutation transients, and the active current limit protects against stall conditions - a critical safety feature when a flap mechanism jams. The PG-SOT223-4 footprint allows direct mounting next to the motor connector, minimizing harness length and EMC pickup.
Recommended
Seat Heater Control
The BTS4142NHUMA1 provides the 24 V drive for seat-heater pads in trucks and commercial vehicles. PWM control via the logic input enables variable-temperature regulation by the seat-control ECU, while thermal shutdown with auto-restart prevents damage if the pad or wiring faults to a short. The 1.4 A rating covers typical pad current at 24 V, and the part's low RDS(on) keeps dissipation well within the package's thermal envelope for continuous seat-heater duty cycles.
Recommended
Recommended Products Summary
Engineering reference data for BTS4142NHUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BTS4140NHUMA1 | BTS4141NHUMA1 | BSP742RIXUMA1 | BSP742RXUMA1 | BTS3046SDRATMA1 | BTS3104SDRATMA1 |
|---|---|---|---|---|---|---|---|
| Package | PG-SOT223-4 | PG-SOT223-4 - same | PG-SOT223-4 - same | PG-SOT223-4 - same | PG-SOT223-4 - same | PG-SOT223-4 - same | PG-SOT223-4 - same |
| Brand | Infineon | Infineon - same | Infineon - same | Infineon - same | Infineon - same | Infineon - same | Infineon - same |
| Nominal Output Current | 1.4 A | 0.7 A | 1.0 A | 0.7 A | 0.7 A | 0.4 A | 0.2 A |
| On-State Resistance (RDS(on)) | 70 mOhm | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Operating Voltage Range | 6 V to 42 V | 6 V to 42 V (Classic PROFET 24V) | 6 V to 42 V (Classic PROFET 24V) | 6 V to 42 V (PROFET family) | 6 V to 42 V (PROFET family) | Low-voltage class | Low-voltage class |
| Topology | High-side N-channel | High-side N-channel | High-side N-channel | High-side N-channel | High-side N-channel | High-side N-channel | High-side N-channel |
| Diagnostic Feedback | Yes (open-load, fault) | Yes | Yes | Yes | Yes | [DATA_NEEDED] | [DATA_NEEDED] |
| Thermal Shutdown / Auto-Restart | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Highest nominal current in the BTS414x Classic PROFET 24V SOT223-4 family (vs BTS4140NHUMA1)
- Full Classic PROFET 24V protection suite in compact SOT223-4 (vs BTS3046SDRATMA1)
- Single-source pin-compatible family simplifies inventory (vs Multi-brand PROFET equivalents)
Design Notes
Estimated: at 1.4 A output and 70 mOhm RDS(on), conduction loss is approximately I^2 x R = 1.4^2 x 0.07 = 0.137 W. With PG-SOT223-4 theta_JA around 70-80 C/W on 1 oz copper (1 sq inch pad), junction rise is roughly 10-15 C above ambient - well within the 150 C Tj limit. For continuous 1.4 A operation at 85 C ambient, increase the drain copper area to at least 2 sq inches or specify a higher-current member of the family.
Solder the PG-SOT223-4 tab (internally connected to Vbb pin 1) to a copper pour that is the same potential as Vbb. The thermal pad must not float. Place a 100 nF ceramic bypass capacitor as close as possible between Vbb and GND to suppress supply transients, and add a 10 uF bulk capacitor on the supply rail near the device for load-dump recovery. Keep the OUT trace short and wide to minimize inductive ringing on the load side.
Do not exceed the maximum inductive load energy (E_load_max) published in the datasheet - repetitive switching of relays or solenoids above this limit will overstress the internal clamp. For PWM dimming of LEDs, choose a frequency below the maximum specified in the datasheet to avoid false triggering of the current limit at high duty cycles. Finally, verify that the diagnostic pin is pulled to a logic level the MCU can tolerate; the part sources a defined diagnostic current only when the output is commanded OFF in some variants.
Compliance Information
RoHS and lead-free per Infineon product page and DigiKey listing. AEC-Q100 qualification status was not present in the verified web data; confirm with Infineon for safety-critical automotive designs. Halogen-free status not stated in retrieved data.
