BTS441TGATMA1 - 17A 24V Smart High-Side Switch | Infineon PROFET
MPN: BTS441TGATMA1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.92 | $3.92 |
| 10 | $3.49 | $34.90 |
| 100 | $2.95 | $295.00 |
| 500 | $2.61 | $1,305.00 |
| 1,000 | $2.38 | $2,380.00 |
BTS441TGATMA1 Overview
What is a smart high-side switch? A high-side switch is a power semiconductor that sits between the positive supply rail and the load, controlling current flow on the high side of the circuit. A 'smart' switch integrates the power MOSFET, gate driver, current sensing, and protection logic into a single IC, replacing discrete solutions built from MOSFETs, sense resistors, fuses, and comparators. Within the power management IC hierarchy, smart high-side switches belong to the load-driver subcategory that bridges microcontrollers and actuators such as lamps, solenoids, motors, and heaters.
The BTS441TGATMA1 embeds overload protection with active current limitation, short-circuit protection, thermal shutdown with auto-restart, overvoltage protection including load-dump, fast demagnetization of inductive loads, and ESD protection. Its diagnostic feedback pin reports open-load and overtemperature conditions to the host microcontroller. The PG-TO263-5-2 package features an exposed thermal pad that reduces junction-to-ambient thermal resistance, enabling sustained 17 A operation on standard FR4 copper.
Architecturally, the device uses a vertical DMOS output stage driven by a charge-pump-derived gate bias, allowing true N-channel high-side switching without the need for an external boost supply. The integrated current-sense amplifier outputs a proportional analog signal, while the status pin uses open-drain logic for easy connection to 3.3 V or 5 V MCUs. Combined, these features allow a single GPIO and one ADC channel to drive and monitor a resistive, inductive, or capacitive load.
Typical applications include automotive lighting control, solenoid and valve drivers, relay replacement, power distribution modules, and industrial 24 V PLC outputs. Engineers select the BTS441TGATMA1 when they need a robust, self-protected high-side driver for inductive loads where discrete protection circuitry would consume excessive PCB area. When designing the load path, keep the ground return short to ensure accurate current sensing, and place a TVS or freewheeling diode near inductive loads even though the device includes internal demagnetization, to limit peak voltages during abrupt turn-off.
Drop-in alternatives for BTS441TGATMA1 β 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 BTS441TGATMA1 (same form factor and footprint) β differing in Number of Channels, Package, Diagnostic Output, Family, Operating Temperature Range.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
BTS441TG
β Drop-Inπ Reference alternative (not in catalog)
BTS442E2
β Drop-Inπ Reference alternative (not in catalog)
BTS555
β Drop-Inπ Reference alternative (not in catalog)
BTS51202EKAXUMA1
β Drop-Inβ In Stock
$1.68 / Unit
View Datasheet βBTS710336ESAXUMA1
β Drop-Inβ In Stock
$2.45 / Unit
View Datasheet βBTS441TGATMA1 Maximum Ratings & Electrical Characteristics
| Product Type | Smart High-Side Power Switch |
| Number of Channels | 1 |
| Output Configuration | High-Side |
| Switch Type | N-Channel (integrated vertical power FET) |
| Load Current (Continuous) | 17 A |
| On-State Resistance (RDS(on) typ.) | 200 mOhm |
| Operating Supply Voltage (Vbb) | 4.5 V to 42 V |
| Overvoltage Protection (Load Dump) | Yes |
| Overload Protection | Yes (current limitation) |
| Short-Circuit Protection | Yes |
| Thermal Shutdown | Yes (with auto-restart) |
| ESD Protection | Yes |
| Diagnostic Output | Status pin (open-drain) |
| Fast Demagnetization of Inductive Loads | Yes |
| Operating Temperature Range | -40 C to +150 C (junction) |
| Package | PG-TO263-5-2 (DPAK-5) surface mount |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Family | Classic PROFET |
BTS441TGATMA1 Pin Configuration
| Pin 1 | OUT β Power output to load (high-side switch drain) |
| Pin 2 | IN β Logic input (gate drive control, active high) |
| Pin 3 | GND β Logic and power ground |
| Pin 4 | Vbb β Battery supply voltage (load power input) |
| Pin 5 | ST β Status / diagnostic output (open-drain) |
| Pin TAB | Vbb β Exposed thermal pad - internally connected to Vbb; solder to PCB copper pour for heat dissipation |
Typical Applications
BTS441TGATMA1 is suitable for 6 applications: Automotive Lighting Control, Solenoid and Valve Drivers, Relay Replacement, Industrial 24 V PLC Outputs, Power Distribution Modules, Heated Seat and Heated Mirror Control.
Automotive Lighting Control
The BTS441TGATMA1 is well suited to drive headlamps, fog lamps, tail lamps, and turn-signal bulbs on 12 V and 24 V automotive systems. Its 17 A continuous current covers high-power halogen or LED-driver front lighting, while its 200 mOhm typical RDS(on) keeps conduction losses low enough to avoid external heatsinking in most lamp modules. Integrated load-dump protection to 42 V tolerates ISO 7637 transients without external TVS clamps, and the status pin reports open-load filament failures to the BCM for bulb-out detection. Compared with discrete MOSFET-plus-relay designs, the PROFET shrinks the PCB area and improves diagnostic coverage, key benefits for body-control modules where space and reliability are critical.
Recommended
Solenoid and Valve Drivers
The BTS441TGATMA1's high-side topology and integrated demagnetization path make it ideal for driving 12 V and 24 V DC solenoids, fuel injectors, transmission valves, and pneumatic actuators. Fast demagnetization safely commutates the inductor's stored energy, extending relay and solenoid life by eliminating arcing at mechanical contacts. Active current limitation allows the host MCU to PWM-modulate solenoid holding current, reducing thermal dissipation after the initial pull-in. With -40 C to +150 C junction temperature range, the device operates reliably under-hood and inside transmission control units. Compared to a discrete high-side switch with an external flyback diode, the BTS441TGATMA1 reduces BOM count and improves EMC performance.
Recommended
Relay Replacement
In body-control modules and power distribution boxes, the BTS441TGATMA1 directly replaces electromechanical relays with a silent, solid-state switch that has no moving parts to wear out. With 17 A continuous capability, it covers the same load range as a typical 30 A automotive mini-relay but adds diagnostic feedback and faster switching speeds. Engineers can PWM-drive loads such as heated seats or HVAC flaps directly from the MCU, simplifying the wire harness. The integrated protection functions also eliminate the need for a fuse on the load branch in many designs, reducing assembly cost. Compared to a relay, the BTS441TGATMA1 saves PCB space and improves long-term reliability in vibration-prone environments.
Recommended
Industrial 24 V PLC Outputs
The BTS441TGATMA1 is a strong choice for industrial PLC digital-output modules that switch 24 V DC loads such as solenoid valves, motor starters, and indicator lamps. Its 42 V maximum supply tolerates the overvoltage transients common on long 24 V field wiring, and its 200 mOhm RDS(on) keeps on-state dissipation below 6 W at full 17 A load. Integrated short-circuit and overload protection allow the module to survive miswired field cables without external fuses, while the status pin enables per-channel fault reporting back to the PLC CPU. Compared with discrete high-side switches, the PROFET reduces wiring complexity and supports hot-swap replacement in modular I/O systems.
Recommended
Power Distribution Modules
In automotive power distribution boxes and zone controllers, the BTS441TGATMA1 serves as the high-side output driver for high-current fuse-less branches feeding other ECUs. Each output's current limit can be set to the wiring's safe rating, providing electronic fuse behavior that re-arms after a fault clears. The status pin reports fault events to the zone master, which can then de-energize redundant branches or alert the driver. With load-dump tolerance up to 42 V, the device is robust against jump-start and inductive transient events. Compared to a fuse-and-relay distribution module, the BTS441TGATMA1 enables software-controlled power sequencing and diagnostics.
Recommended
Heated Seat and Heated Mirror Control
The BTS441TGATMA1's PWM capability and 17 A rating make it a natural fit for heated-seat elements and exterior mirror heaters drawing 5 to 12 A on 12 V vehicle electrical systems. The integrated current limit protects the heating element against partial shorts, while thermal shutdown prevents the seat or mirror housing from exceeding safe temperatures. The status pin allows the body controller to detect open-load (failed heater) conditions and warn the driver. Compared with a relay plus thermal fuse, the PROFET's continuous current feedback enables software-controlled temperature loops via duty-cycle modulation, improving passenger comfort and energy efficiency.
Recommended
Recommended Products Summary
Engineering reference data for BTS441TGATMA1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BTS441TG | BTS442E2 | BTS555 | BTS51202EKAXUMA1 | BTS710336ESAXUMA1 |
|---|---|---|---|---|---|---|
| Package | PG-TO263-5-2 | PG-TO263-5-2 (same) | PG-TO263-5-2 (same) | PG-TO263-5-2 (same) | PG-TO263-5-2 (same) | PG-TO263 (same family) |
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Continuous Load Current | 17 A | 17 A | ~17-20 A (improved RDS(on)) | ~4-5 A per channel | ~5 A per channel | ~3 A per channel |
| On-State Resistance (typ.) | 200 mOhm | 200 mOhm | Lower RDS(on) | Higher per-channel RDS(on) | Higher per-channel RDS(on) | Higher per-channel RDS(on) |
| Operating Supply Voltage | 4.5 V to 42 V | 4.5 V to 42 V | 4.5 V to 42 V | 4.5 V to 42 V | 4.5 V to 42 V | 4.5 V to 42 V |
| Overload Protection | Yes (current limit) | Yes | Yes | Yes | Yes | Yes |
| Thermal Shutdown | Yes (auto-restart) | Yes | Yes | Yes | Yes | Yes |
| Status / Diagnostic Pin | Yes | Yes | Yes (improved diagnostics) | Yes (per channel) | Yes (per channel) | Yes (per channel) |
Key Differentiators
- 17 A continuous current in a single PG-TO263-5-2 channel (vs BTS555)
- Proven Classic PROFET platform with long-term availability (vs BTS442E2)
- Integrated load-dump and short-circuit protection (vs Discrete MOSFET + fuse design)
Design Notes
Estimated: at Vbb=14 V, RDS(on)=200 mOhm, and continuous 17 A load, the BTS441TGATMA1 dissipates approximately P = I^2 * R = 17^2 * 0.2 = 57.8 W, which exceeds practical operation; sustained current must be derated per the SOA graph in the datasheet, or RDS(on) must drop at higher temperatures. With a typical theta_JA near 40 C/W on a 1-square-inch copper pour, the junction-to-ambient thermal path is adequate for sustained 5-8 A loads but requires a larger copper area or airflow for full 17 A continuous duty. Always reference the manufacturer's SOA curves and thermal derating curves for your specific PCB layout.
Solder the exposed thermal pad of the PG-TO263-5-2 package to a generously sized copper pour on the top layer, with thermal vias to inner or bottom-layer copper for heat spreading. The Vbb pin and the tab are internally connected, so the copper pour also carries load current - design the pour area to support both thermal dissipation and the maximum 17 A load without excessive voltage drop. Place a 100 nF ceramic decoupling capacitor close to Vbb and a larger 10-47 uF bulk capacitor to handle transient inrush currents when driving capacitive loads such as incandescent lamps.
A common mistake is leaving the IN pin floating during microcontroller reset, which can cause the BTS441TGATMA1 to partially turn on and deliver unpredictable current to the load. Always tie IN to the MCU through a defined logic level (or pull-down/pull-up resistor if unused). For inductive loads, although the device includes fast demagnetization, add an external TVS clamp or freewheeling diode for very high-energy inductors (>10 mH). Finally, do not exceed 42 V on Vbb; load-dump transients above 42 V require external clamping.
Compliance Information
AEC-Q100 qualified for automotive applications; RoHS and REACH compliant per Infineon product page. Classic PROFET family is targeted at 12 V and 24 V automotive subsystems.
