BTS51202EKAXUMA1 - 120 mΩ Dual Smart High-Side Switch | Infineon
MPN: BTS51202EKAXUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.18 | $218.00 |
| 500 | $1.92 | $960.00 |
| 1,000 | $1.68 | $1,680.00 |
BTS51202EKAXUMA1 Overview
What is a Smart High-Side Power Switch? A high-side power switch is a semiconductor device that controls current flow between a load and the positive supply rail, switching on the high (supply) side of the load rather than the low (ground) side. Smart high-side switches integrate a power MOSFET with a charge pump, gate driver, and protection/diagnostic features into a single IC. This topology belongs to the broader family of power distribution switches, which sit within the power management IC category and ultimately the semiconductor device hierarchy. By integrating protection locally, smart high-side switches replace discrete MOSFETs, gate drivers, fuses, and discrete protection circuitry, reducing PCB area and improving reliability.
Key features of the BTS51202EKAXUMA1 include a typical on-state resistance of 120 mΩ per channel, a continuous output current rating of 2A per channel (typical 2.5A), and an operating voltage range from 8V to 18V (suitable for 12V automotive systems). The device integrates over-current, short-circuit, over-temperature, over-voltage, under-voltage lockout, and reverse-battery protection. An integrated charge pump drives the N-channel MOSFET gates for low-RDS(on) operation, and a status/diagnostic feedback pin reports fault conditions to the host MCU.
The BTS5120-2EKA uses Infineon's Smart6 process technology, combining vertical power MOSFETs with on-chip CMOS control logic. The charge pump generates the gate-boost voltage required to fully enhance the N-channel MOSFETs from a 12V supply, achieving the low 120 mΩ on-resistance. Each channel operates independently with separate input control and diagnostic feedback, enabling per-channel fault handling and load management.
Typical applications include automotive body electronics (e.g., lighting control, seat heating, mirror adjust), LED driver modules, HVAC blower control, and 12V power distribution in vehicles. The PG-DSO-14-EP exposed-pad package provides low thermal resistance for dissipating the ~1.8W maximum power under fault or steady-state load conditions. The reverse-battery protection eliminates the need for an external reverse-polarity diode, reducing BOM cost.
When designing with this part, observe the maximum junction temperature of 150°C and ensure sufficient copper area on the PCB beneath the exposed pad for thermal dissipation. The status feedback is open-drain and requires a pull-up resistor. Fault conditions should be debounced in software to avoid nuisance trips during inrush events such as cold lamp filaments.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone.
Drop-in alternatives for BTS51202EKAXUMA1 — 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 BTS51202EKAXUMA1 (same form factor and footprint) — differing in Package, Technology, Automotive Qualified, Number of Channels, Topology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
BTS441RGATMA1
✅ Drop-In✓ In Stock
$2.21 / Unit
View Datasheet →BTS710336ESAXUMA1
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →BTS51202EKAXUMA1 Maximum Ratings & Electrical Characteristics
| Topology | Dual High-Side Switch (2 channels) |
| Technology | Smart6 (N-channel vertical MOSFET with charge pump) |
| Number of Channels | 2 |
| On-State Resistance (RDS(on)) | 120 mΩ (typical per channel) |
| Continuous Output Current | 2 A per channel (typical 2.5 A) |
| Operating Voltage (Vbb) | 8 V to 18 V |
| Load Type | Lamps up to 1×10 W, LEDs, resistive/inductive loads |
| Package | PG-DSO-14-40-EP (14-pin SOIC with exposed pad) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 °C to +150 °C |
| Maximum Power Dissipation | 1800 mW |
| Integrated Protection | Over-current, Short-circuit, Over-temperature, Over-voltage, Under-voltage lockout, Reverse battery |
| Diagnostic Output | Yes (status feedback pin) |
| Charge Pump | Integrated |
| Automotive Qualified | Yes |
| RoHS Status | Compliant |
BTS51202EKAXUMA1 Pin Configuration
| Pin 1 | OUT1 — Channel 1 output to load |
| Pin 2 | IN1 — Channel 1 input control (logic-level) |
| Pin 3 | GND — Ground |
| Pin 4 | ST/DIAG — Status / diagnostic feedback |
| Pin 5 | Vbb — Battery supply (8V to 18V) |
| Pin 6 | Vbb — Battery supply (8V to 18V) |
| Pin 7 | OUT2 — Channel 2 output to load |
| Pin 8 | IN2 — Channel 2 input control (logic-level) |
| Pin 9 | GND — Ground |
| Pin 10 | NC — Not connected (per datasheet) |
| Pin 11 | NC — Not connected (per datasheet) |
| Pin 12 | NC — Not connected (per datasheet) |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | NC — Not connected (per datasheet) |
Typical Applications
BTS51202EKAXUMA1 is suitable for 6 applications: Automotive Lighting Control, Automotive LED Driver Modules, HVAC Blower and Fan Control, Body Control Module (BCM) Load Switches, 12V Power Distribution in Vehicles, Industrial 24V Relay Replacement.
Automotive Lighting Control
The BTS51202EKAXUMA1 drives automotive exterior and interior lamps (headlights, tail lights, turn indicators, interior dome lights) up to 1×10W per channel from a 12V battery. Its 120 mΩ RDS(on) minimizes conduction losses and thermal stress, while integrated short-circuit and over-temperature protection handle the inrush currents typical of cold incandescent filaments. The exposed pad dissipates the ~1.8W maximum power, and the diagnostic feedback enables the BCM (body control module) to detect open-load and short-circuit faults for OBD-II compliance.
Recommended
Automotive LED Driver Modules
The BTS51202EKAXUMA1 switches LED strings in tail-light, DRL (daytime running light), and interior ambient-lighting modules with PWM dimming support. The device's fast switching and integrated charge pump handle the high-side drive requirement for N-channel MOSFETs at 12V, while reverse-battery protection eliminates the external reverse-polarity diode that discrete designs require. Diagnostic feedback reports open-LED faults to the host MCU, supporting ASIL-B functional safety goals for exterior lighting.
Recommended
HVAC Blower and Fan Control
The BTS51202EKAXUMA1 controls HVAC blower motors and cooling fans in automotive climate-control modules. Its 2A per-channel continuous current rating handles the steady-state load of small brushless DC fans, while over-current and short-circuit protection trip on stall conditions. The exposed-pad PG-DSO-14-40-EP package maintains junction temperature within limits under continuous operation, and reverse-battery protection survives jump-start mis-wiring events common in service environments.
Recommended
Body Control Module (BCM) Load Switches
The BTS51202EKAXUMA1 functions as a 12V load switch in automotive BCMs controlling seat heaters, mirror adjusters, and door-lock solenoids. Each channel's independent input control and diagnostic feedback simplify firmware development, while the small PG-DSO-14-40-EP footprint saves PCB area in space-constrained BCMs. Integrated reverse-battery and load-dump protection meets ISO 7637-2 automotive transient requirements without external TVS components.
Recommended
12V Power Distribution in Vehicles
The BTS51202EKAXUMA1 distributes 12V battery power to accessory loads in passenger vehicles, acting as an electronic fuse replacement. Its integrated current limiting and diagnostic feedback support intelligent power management, enabling the host MCU to shed non-critical loads during low-voltage (cranking) events. The 8V to 18V operating range covers cold-crank and load-dump transients per ISO 16750-2, eliminating discrete protection components.
Recommended
Industrial 24V Relay Replacement
The BTS51202EKAXUMA1 can replace electromechanical relays in industrial 24V systems (with external voltage translation) for switching solenoids, valves, and indicator lamps. Its solid-state design eliminates relay contact bounce, arcing, and mechanical wear, extending system lifetime in high-cycle applications. Diagnostic feedback reports wiring faults to the PLC, and the wide operating temperature range supports harsh industrial environments.
Recommended
Recommended Products Summary
Engineering reference data for BTS51202EKAXUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BTS441RGATMA1 | BTS710336ESAXUMA1 |
|---|---|---|---|
| Package | PG-DSO-14-40-EP | PG-DSO-14-40-EP - same | PG-DSO-14-40-EP - same |
| Brand | Infineon | Infineon | Infineon |
| Topology | Dual High-Side (2 channels) | Single High-Side (1 channel) | Triple High-Side (3 channels) |
| RDS(on) | 120 mΩ typical | Similar (~150 mΩ) | Similar (PROFET+ 12V family) |
| Output Current per Channel | 2 A continuous | Similar single-channel rating | Higher 3-channel rating |
| Operating Voltage | 8 V to 18 V | 8 V to 18 V (12V PROFET) | 8 V to 18 V (PROFET+ 12V) |
| Diagnostic Feedback | Yes (single ST pin) | Yes | Yes (per-channel) |
| Automotive Qualified | Yes | Yes | Yes |
Key Differentiators
- Dual-channel integration in compact 14-pin PG-DSO package (vs BTS441RGATMA1)
- Six integrated protection functions (vs Discrete MOSFET + fuse design)
- Automotive-qualified with full diagnostic feedback (vs Industrial-grade load switch)
Design Notes
Estimated: at full 2A per channel and 1.8W maximum power dissipation, the junction temperature rise depends on PCB copper area beneath the PG-DSO-14-40-EP exposed pad. With a 4-layer FR4 board and 1 square inch of exposed-pad copper, theta_JA is approximately 35°C/W, allowing continuous operation up to ~85°C ambient. For high-ambient or fully-loaded dual-channel operation, expand the copper pour to 2 square inches or add thermal vias to an inner plane.
Solder the exposed pad to a continuous ground copper pour with multiple thermal vias for heat extraction. Place the input capacitors as close as possible to the Vbb pins to suppress voltage transients during load-dump events. Route the IN1/IN2 control traces away from the OUT1/OUT2 power traces to minimize capacitive coupling that can cause false turn-on events during high dv/dt switching.
Do not exceed the 18V maximum Vbb rating - load-dump transients in 12V automotive systems can exceed this if not clamped externally. The status feedback pin is open-drain and requires an external pull-up resistor to Vcc. Fault conditions during inrush (cold filament) should be debounced in firmware to avoid nuisance trips; consider disabling the fault latch for the first 10 ms after turn-on.
Compliance Information
AEC-Q100 automotive qualified per Infineon product page. RoHS compliant. EU RoHS compliant per Arrow listing.
