BTS3050EJXUMA1 - 50mΩ 4A Smart Low-Side Switch | Infineon
MPN: BTS3050EJXUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.62 | $16.20 |
| 100 | $1.38 | $138.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $1.02 | $1,020.00 |
| 3,000 | $0.86 | $2,580.00 |
Drop-in alternatives for BTS3050EJXUMA1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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View Datasheet →BTS3050EJXUMA1 Maximum Ratings & Electrical Characteristics
| Product Type | Smart Low-Side Power Switch |
| Technology | N-Channel Vertical Power MOSFET (HITFET +12V) |
| On-State Resistance (RDS(on)) | 50 mΩ (typical at 25 °C) |
| Continuous Load Current | 4 A |
| Number of Channels | 1 (Single channel) |
| Topology | Low-Side Switch (1:1) |
| Load Voltage | 12 V automotive nominal |
| ESD Protection | Yes (on IN pin / Source / Ground) |
| Thermal Protection | Auto-restart overtemperature shutdown |
| Package | PG-TDSO-8-31 (TDSO8-31) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Automotive Grade | AEC-Q100 qualified (HITFET +12V family) |
BTS3050EJXUMA1 Pin Configuration
| Pin 1 | IN — Logic input (drive from MCU GPIO; also ESD-protected Source/Ground reference) |
| Pin 2 | OUT — Power output to load (drain of internal N-channel MOSFET) |
| Pin 3 | OUT — Power output to load (drain; tied to pin 2 internally) |
| Pin 4 | GND — Ground / Source of internal MOSFET |
| Pin 5 | GND — Ground / Source (tied to pin 4) |
| Pin 6 | GND — Ground / Source (tied to pin 4) |
| Pin 7 | Vbb — Load supply voltage (battery / 12 V rail) |
| Pin 8 | NC — Not connected (per datasheet) |
Safe Operating Area
Typical Applications
BTS3050EJXUMA1 is suitable for 6 applications: Automotive LED Tail Lamp PWM Driver, Body Control Module (BCM) Load Driver, Relay and Solenoid Replacement, HVAC Flap and Door Mirror Motor Driver, Resistive Heating Element Switch, General-Purpose 12 V Industrial Load Switch.
Automotive LED Tail Lamp PWM Driver
The BTS3050EJXUMA1 is well-suited to 12 V automotive LED tail lamp modules because its low-side N-channel MOSFET switches the ground return, allowing direct ground-referenced PWM dimming without bootstrap capacitors. With 50 mΩ RDS(on) and 4 A continuous current, it comfortably drives multi-LED strings drawing 1-2 A; for example, a 1.5 A string dissipates only ~113 mW in the switch. Integrated thermal auto-restart protects against LED short-to-ground faults, and the small PG-TDSO-8-31 footprint suits compact lamp PCBs. Companion: BTS3035TFATMA1 for higher-current lamp variants.
Recommended
Body Control Module (BCM) Load Driver
In 12 V body control modules the BTS3050EJXUMA1 serves as the protected interface between a 3.3 V/5 V microcontroller GPIO and ground-referenced loads such as interior lamps, mirror heaters, or indicator LEDs. The integrated ESD protection on the IN pin simplifies ISO 7637-2 transient design, while the 50 mΩ RDS(on) limits conduction loss to under 200 mW at typical BCM load currents of 1-2 A. The PG-TDSO-8-31 package enables high-density multi-channel BCM layouts. Companion: TLE75080ESHXUMA1 multi-channel SPI driver.
Recommended
Relay and Solenoid Replacement
The BTS3050EJXUMA1 is a solid-state replacement for automotive relays and small solenoids, eliminating coil current draw, contact bounce, and mechanical wear. Its 4 A continuous rating covers most body-electronic relays driving resistive or inductive loads up to ~50 W at 13.5 V, and the smart-protection features handle the inrush and back-EMF of inductive kick. Mounted in PG-TDSO-8-31, it sits directly on the PCB without a socket. Companion: BTN9960LVAUMA1 for half-bridge motor control.
Recommended
HVAC Flap and Door Mirror Motor Driver
Small brushed DC motors in HVAC air-flap actuators and door mirror adjustment mechanisms operate from the BTS3050EJXUMA1's low-side switch in either single-direction or back-to-back H-bridge configurations. The 50 mΩ RDS(on) keeps conduction loss below ~500 mW at typical 3 A motor currents, and the integrated thermal auto-restart prevents damage during stalled-rotor conditions. PWM speed control up to several kHz is supported by the fast switching of the N-channel output stage. Companion: BTS5210GXUMA1 dual high-side for mirror fold.
Recommended
Resistive Heating Element Switch
For 12 V resistive heating elements such as seat heaters, mirror heaters, or steering-wheel heaters, the BTS3050EJXUMA1 offers a protected low-side switch with thermal auto-restart that protects against over-current faults and shorts. Its 4 A rating supports up to ~50 W of heating power at 13.5 V system voltage, sufficient for typical single-zone seat heaters. The 50 mΩ RDS(on) limits conduction loss to under 1 W at full load. Companion: TLE75004EPDXUMA1 multi-channel low-side for seat control.
Recommended
General-Purpose 12 V Industrial Load Switch
Outside automotive, the BTS3050EJXUMA1 serves as a protected low-side switch for 12 V industrial control systems, including PLC digital outputs, process control valves, and indicator lamps. Its integrated ESD protection, current limit, and thermal shutdown reduce external protection component count, while the 50 mΩ / 4 A rating covers most low-power industrial loads. The PG-TDSO-8-31 package is suitable for SMT manufacturing. Companion: IRS2181STRPBF for half-bridge industrial motor control.
Recommended
Recommended Products Summary
Engineering reference data for BTS3050EJXUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BTS3050TFATMA1 | BTS3035TFATMA1 | BTS3060TFATMA1 | BTS3125TFATMA1 | BTS118DATMA1 |
|---|---|---|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Package | PG-TDSO-8-31 | TO-252 (DPAK) | TO-252 (DPAK) | TO-252 (DPAK) | TO-252 (DPAK) | TO-252 (DPAK) |
| RDS(on) (typ @ 25 °C) | 50 mΩ | 50 mΩ (same) | 35 mΩ (-30%) | 60 mΩ (+20%) | 125 mΩ (+150%) | [DATA_NEEDED] |
| Continuous Load Current | 4 A | 4 A (same) | 4 A (same) | 4 A (same) | [DATA_NEEDED] | [DATA_NEEDED] |
| Topology | Low-Side (1:1) | Low-Side (1:1) | Low-Side (1:1) | Low-Side (1:1) | Low-Side (1:1) | Low-Side (1:1) |
| Technology | HITFET +12V (N-channel vertical MOSFET) | HITFET +12V (same) | HITFET +12V (same) | HITFET +12V (same) | HITFET +12V (same) | HITFET +12V (same) |
| Thermal Protection | Auto-restart shutdown | Auto-restart shutdown | Auto-restart shutdown | Auto-restart shutdown | Auto-restart shutdown | Auto-restart shutdown |
| Automotive Grade | AEC-Q100 (family) | AEC-Q100 (family) | AEC-Q100 (family) | AEC-Q100 (family) | AEC-Q100 (family) | AEC-Q100 (family) |
| Unit Price @ 1000 pcs (USD) | 1.02 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Compact PG-TDSO-8-31 footprint (vs BTS3050TFATMA1)
- Lower RDS(on) than higher-current siblings (vs BTS3060TFATMA1)
- Drop-in replacement within HITFET +12V family (vs BTS3125TFATMA1)
Design Notes
At 4 A continuous load in PG-TDSO-8-31, the BTS3050EJXUMA1 dissipates roughly P = I² × R = 16 × 0.05 = 0.8 W. Estimated: with a typical theta_JA of ~50 C/W on a 1 square inch copper pour, junction temperature rise above ambient is ~40 C. Above ~3 A sustained, increase copper area or add thermal vias to the exposed tab to keep Tj below the 150 °C thermal-shutdown threshold. Always design for worst-case ambient (e.g. 85 °C in engine compartment).
Solder the package exposed tab (Source/Ground) to a continuous copper pour of at least 1 square inch on the top layer; add thermal vias to inner/bottom copper layers for higher current. Place the local Vbb decoupling ceramic capacitor (≥100 nF X7R) within 5 mm of pin 7 to absorb load-dump transients. Keep the IN trace short and away from switching nodes to minimize injected noise.
Do not connect a load to Vbb without a return path through the BTS3050EJXUMA1's GND pins — this is a low-side switch, not a high-side driver. Avoid driving the IN pin above the absolute-max rating; ESD protection is integrated but does not replace external TVS for ISO 7637-2 pulse A. Verify that PWM frequency stays within the part's switching capability; for very high frequencies consult the datasheet's switching-time curves.
Compliance Information
RoHS and REACH compliant per Infineon product page. HITFET +12V family is AEC-Q100 qualified for automotive use. Halogen-free and lead-free per Infineon packaging materials declaration.
