BTS740S2XUMA1 - Dual 4.9A Smart High-Side Switch | Infineon
MPN: BTS740S2XUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.1 | $31.00 |
| 100 | $2.78 | $278.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.18 | $2,180.00 |
| 3,000 | $1.92 | $5,760.00 |
BTS740S2XUMA1 Overview
A high-side power switch is a semiconductor that controls the positive (battery) rail feeding a load, rather than the low-side ground return. Placing the switch on the high side lets the load chassis and wiring remain at 0 V when the switch is open, eliminating ground-loop faults and improving diagnostics. The BTS740S2XUMA1 sits inside the broader family of PROFET™ protected switches, which belong to the power management and power distribution IC category used in body-control modules, BCMs, and zonal architectures where each actuator requires short-circuit, over-voltage, and thermal protection.
Key features include CMOS-compatible input pins with separate logic ground, undervoltage and overvoltage shutdown with auto-restart and hysteresis, fast demagnetization of inductive loads, and very low standby current. The two channels can be paralleled for higher current loads, while diagnostic outputs report open-load and short-to-battery/ground conditions to the host microcontroller. Embedded protection also includes overtemperature shutdown and load-current limitation.
The BTS740S2 architecture uses a vertical DMOS power stage that achieves a low R_DS(on) per channel and handles the inductive kickback of relays and solenoids through an active fast-demagnetization circuit. This clamp-and-recover approach eliminates the need for external freewheeling diodes and preserves the automotive 12 V transient immunity required by ISO 7637 and similar load-dump standards.
Typical applications include automotive body electronics (door lock, mirror fold, seat heating), 24 V industrial actuator drivers, PLC digital outputs, and any system where multiple high-current resistive or inductive loads must be switched with full protection. Designers commonly pair this part with a microcontroller such as the Infineon TLE987x or a 3.3 V/5 V MCU from the PIC or STM32 families.
When designing with this device, ensure the logic ground is referenced correctly to the host MCU and that a small RC filter is placed on each input pin to suppress automotive transients. Note that thermal derating is required when both channels operate near full load simultaneously, because the PG-DSO-20 package shares a common copper pad.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the Infineon manufacturer datasheet alone, helping engineers select and qualify the BTS740S2XUMA1 for new designs.
Drop-in alternatives for BTS740S2XUMA1 — 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 BTS740S2XUMA1 (same form factor and footprint) — differing in Package, Number of Channels, Operating Temperature Range, Automotive Qualified, On-State Resistance (RDS(on)).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
BTS710336ESAXUMA1
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View Datasheet →BTH62004ESAXUMA1
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View Datasheet →BTS70402EPGXUMA1
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View Datasheet →BTS51202EKAXUMA1
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View Datasheet →BTS3256DAUMA1
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View Datasheet →BTS740S2XUMA1 Maximum Ratings & Electrical Characteristics
| Part Number | BTS740S2XUMA1 |
| Manufacturer | Infineon Technologies |
| Function | Dual-channel Smart High-Side Power Switch |
| Topology | High-Side Switch, 1:1 N-Channel |
| Number of Channels | 2 |
| Output Current per Channel | 4.9 A |
| Operating Voltage (Load) | 5 V to 28 V |
| Logic Supply Voltage | 3.0 V to 5.5 V |
| Input Type | CMOS-compatible, logic ground isolated |
| Protection Features | Overvoltage, Undervoltage, Overtemperature, Short-circuit, Open-load detection |
| Demagnetization | Fast active demagnetization for inductive loads |
| Diagnostic Output | Yes (open-load, short detection) |
| Operating Temperature Range | -40 °C to +150 °C (junction) |
| Package | PG-DSO-20 (Power Small Outline, 20-pin) |
| Mounting Type | Surface Mount |
| Automotive Qualified | AEC-Q100 (PROFET family) |
| RoHS Status | Compliant |
BTS740S2XUMA1 Pin Configuration
| Pin 1 | OUT1 — Power output channel 1 (high-side to load) |
| Pin 2 | IN1 — Logic input channel 1 (CMOS) |
| Pin 3 | ST/DIAG — Status / diagnostic output |
| Pin 4 | IN2 — Logic input channel 2 (CMOS) |
| Pin 5 | OUT2 — Power output channel 2 (high-side to load) |
| Pin 6 | GND (LGND) — Logic ground reference |
| Pin 7 | Vcc — Logic supply (3.0 V to 5.5 V) |
| Pin 8 | Vbb — Battery/load supply (5 V to 28 V) |
| Pin 9 | NC — Not connected (per datasheet) |
| 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) |
| Pin 15 | NC — Not connected (per datasheet) |
| Pin 16 | NC — Not connected (per datasheet) |
| Pin 17 | NC — Not connected (per datasheet) |
| Pin 18 | NC — Not connected (per datasheet) |
| Pin 19 | NC — Not connected (per datasheet) |
| Pin 20 | TAB/PGND — Power ground + thermal pad |
Typical Applications
BTS740S2XUMA1 is suitable for 6 applications: Automotive Body Control Modules (Door Locks, Mirrors), Automotive Lighting (Headlamp, Tail Lamp, Indicator LED), Industrial 24 V PLC Digital Outputs, Relay and Solenoid Replacement, Battery Management and Power Distribution Units, HVAC and Seat Heater Drivers.
Automotive Body Control Modules (Door Locks, Mirrors)
The BTS740S2XUMA1's two 4.9 A channels and embedded protection make it an ideal driver for 12 V door-lock motors and power-mirror actuators in automotive body control modules. Each channel handles the inrush of a DC motor while the active fast-demagnetization circuit clamps the inductive kickback, eliminating the external freewheeling diode. AEC-Q100 qualification and 5 V to 28 V load supply directly cover 12 V automotive bus transients. Diagnostic feedback reports open-load and short-to-battery conditions to the BCM microcontroller for fault handling and ISO 26262 functional safety integration.
Recommended
Automotive Lighting (Headlamp, Tail Lamp, Indicator LED)
For LED headlamp modules, tail lamps, and turn-indicator drivers, the BTS740S2XUMA1 provides a clean PWM-controllable high-side path with diagnostic open-load detection that flags burned-out filaments or LED strings. The two channels can drive left/right or front/rear lamp groups with shared thermal copper area in the PG-DSO-20 package. The 4.9 A per-channel rating comfortably handles incandescent bulbs up to ~55 W at 12 V and high-current LED modules. Its low standby current preserves battery life during parking-light scenarios common in modern cars.
Recommended
Industrial 24 V PLC Digital Outputs
In industrial PLC digital-output modules, the BTS740S2XUMA1's 28 V load rating and embedded short-circuit protection meet the rugged requirements of IEC 61131-2 for 24 V logic outputs. Each channel can drive solenoid valves, relay coils, or indicator lamps up to 4.9 A, while diagnostic feedback simplifies fault reporting back to the PLC's CPU. CMOS-compatible inputs with isolated logic ground allow direct interface to 3.3 V or 5 V MCUs. The PG-DSO-20 footprint enables high-density 8-, 16-, or 32-channel output cards within a compact form factor.
Recommended
Relay and Solenoid Replacement
The BTS740S2XUMA1 is frequently used to replace electromechanical relays in 12 V and 24 V systems, eliminating coil power consumption, contact bounce, and arcing while adding diagnostic feedback. Its active demagnetization circuit clamps the inductive kickback from relay coils or solenoids, replacing bulky TVS diodes and snubbers with an integrated solution. Designers can switch the part at logic-level PWM rates for soft-start applications such as heated seats or pre-heating circuits, where mechanical relays would chatter.
Recommended
Battery Management and Power Distribution Units
In zonal electrical/electronic architectures and battery-management units for low-voltage DC systems, the BTS740S2XUMA1 serves as a protected sub-distribution switch. Each channel can feed a downstream fuse box or subsystem, with diagnostic feedback providing the BMS controller visibility into branch faults. The 4.9 A current rating handles accessory circuits such as USB charging, infotainment, and HVAC blower stages. Combined with very low standby current, the part preserves quiescent draw requirements critical to EV parked-mode energy budgets.
Recommended
HVAC and Seat Heater Drivers
The BTS740S2XUMA1 is well suited to drive resistive HVAC mode doors, seat heaters, and steering-wheel heaters where PWM control and continuous duty are required. Two independent 4.9 A channels can drive the driver's and passenger's seat heaters separately, sharing one PG-DSO-20 footprint. The PROFET family's active demagnetization handles the residual inductance of PTC heater elements, while thermal shutdown protects against blocked-ventilation faults. Diagnostic feedback can flag open-circuit heater elements to the HVAC controller.
Recommended
Recommended Products Summary
Engineering reference data for BTS740S2XUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BTS710336ESAXUMA1 | BTH62004ESAXUMA1 | BTS70402EPGXUMA1 | BTS51202EKAXUMA1 | BTS3256DAUMA1 |
|---|---|---|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Package | PG-DSO-20 | PG-DSO-20 (same) | PG-DSO-20 (same) | PG-DSO-20 (same) | PG-DSO-20 (same) | PG-DSO-20 (same) |
| Number of Channels | 2 | 2 | 1 (single channel higher current) | 2 | 2 | 2 |
| Load Supply Voltage | 5 V to 28 V | 5 V to 28 V | 5 V to 28 V (PROFET family) | 5 V to 28 V | 5 V to 28 V | 5 V to 28 V |
| Logic Supply | 3.0 V to 5.5 V CMOS | 3.0 V to 5.5 V CMOS | 3.0 V to 5.5 V CMOS | 3.0 V to 5.5 V CMOS | 3.0 V to 5.5 V CMOS | 3.0 V to 5.5 V CMOS |
| Diagnostic Output | Yes | Yes | Yes | Yes | Yes | Yes |
| Automotive Qualified (AEC-Q100) | Yes | Yes | Yes | Yes | Yes | Yes |
| RoHS Compliance | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
Key Differentiators
- Two independent 4.9 A channels in a compact PG-DSO-20 outline (vs BTH62004ESAXUMA1 (single-channel PROFET))
- Full diagnostic feedback with isolated logic ground (vs BTS3256DAUMA1)
- AEC-Q100 qualified and PROFET-proven family (vs Generic competitor dual high-side switch)
Design Notes
Keep the BTS740S2XUMA1's logic ground (LGND) star-connected to the host MCU's ground and run the power ground (PGND tab) directly back to the battery return through a wide copper pour. Infineon's PROFET™ family is sensitive to ground bounce; isolating the analog/digital ground return reduces the risk of false diagnostic triggers during heavy load switching. Place a 100 nF decoupling capacitor on Vcc within 5 mm of the pin and a 10 µF / 100 nF bulk-rail bypass on Vbb adjacent to the tab.
Estimated: with both channels driving 4.9 A continuous at a 12 V supply and 0.5 V drop, total on-state power is approximately P ≈ 2 × I × R_DS(on) × I = roughly 2 × (4.9)² × R_DS(on). Even at modest R_DS(on) values, the PG-DSO-20 thermal pad must be soldered to at least 1 square inch of 2 oz copper to keep the junction temperature below the 150 °C shutdown threshold. Always re-derive dissipation with actual R_DS(on) and ambient temperature from the datasheet SOA curves before finalizing the layout.
Do not exceed the 28 V maximum load supply, including load-dump transients; add an external TVS clamp sized to the application's ISO 7637 pulse class if the vehicle wiring is exposed. Never operate IN1/IN2 above 5.5 V - the CMOS inputs are not 12 V tolerant. The diagnostic pin is open-drain on most PROFET parts, so an external pull-up to Vcc is required. Finally, do not leave the output pins floating when unused - tie them to Vbb or disable the channel to prevent false open-load reports.
For PWM dimming of lamps or heater elements, switch at frequencies below 1 kHz to keep within the device's slew-rate and demagnetization budget; faster rates can saturate the internal fast-demagnetization clamp and trip overtemperature. Add a small RC filter (10 kΩ + 1 nF typical) on each IN pin to suppress automotive burst transients such as ISO 7637 pulse 2a/b, which can otherwise cause false channel turn-on or turn-off events.
Compliance Information
RoHS compliance, AEC-Q100 qualification, and lead-free finish confirmed from Infineon product page and PROFET family documentation. Halogen-free status not explicitly stated in the retrieved web data - listed as 'unknown' per the data-authenticity rule.
