BTS428L2ATMA1 - 5.8A Smart High-Side Switch | Infineon
MPN: BTS428L2ATMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.18 | $218.00 |
| 500 | $1.85 | $925.00 |
| 1,000 | $1.62 | $1,620.00 |
| 2,500 | $1.45 | $3,625.00 |
Drop-in alternatives for BTS428L2ATMA1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
BTS428L2NT
✅ Drop-In📋 Reference alternative (not in catalog)
BTS134DATMA1
✅ Drop-In✓ In Stock
$0.66 / Unit
View Datasheet →ITS724GFUMA1
✅ Drop-In✓ In Stock
$2.3 / Unit
View Datasheet →BSP762TXUMA1
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →BSP742RIXUMA1
✅ Drop-In✓ In Stock
$0.96 / Unit
View Datasheet →BTS4142NHUMA1
✅ Drop-In✓ In Stock
$0.97 / Unit
View Datasheet →BTS3104SDRATMA1
✅ Drop-In✓ In Stock
$0.84 / Unit
View Datasheet →BTS428L2ATMA1 Maximum Ratings & Electrical Characteristics
| Product Type | Smart High-Side Power Switch |
| Technology | Smart SIPMOS (vertical N-channel MOSFET with charge pump) |
| Number of Channels | 1 |
| Input Type | CMOS-compatible, ground-referenced |
| On-State Resistance (R_DS(on)) | 50 mOhm (typical) |
| Continuous Load Current | 5.8 A |
| Standby Current | Very low (per datasheet) |
| Overvoltage Protection | Load-dump / overvoltage clamp |
| Overtemperature Protection | Yes, with autorestart |
| Diagnostic Feedback | Yes (open-load, short-circuit, overtemperature) |
| Package | PG-TO252-5-11 (DPAK-5, 4 leads + tab) |
| Mounting Type | Surface Mount |
| RoHS / Pb-Free | Yes (Green product, Pb-free finish, J-STD-020) |
| Soldering | Pb-free reflow per IPC/JEDEC J-STD-020 |
| Qualification | Automotive-grade (PROFET family) |
BTS428L2ATMA1 Pin Configuration
| Pin 1 | IN — CMOS-compatible control input (active high) |
| Pin 2 | GND — Ground reference for input and diagnostics |
| Pin 3 | ST/DIAG — Status / diagnostic feedback output |
| Pin 4 | Vbb / NC — Per datasheet: pin function depends on revision; verify against latest datasheet |
| Pin 5 | Tab (Drain/OUT) — Power output to load - also serves as thermal pad |
Safe Operating Area
Typical Applications
BTS428L2ATMA1 is suitable for 6 applications: Automotive Body Control Module (BCM) Load Drivers, Automotive LED Lighting Modules, Industrial 24V PLC Digital Outputs, Truck and Bus 24V Power Distribution, HVAC and Seat Control Modules, Solar Battery Charger Load Disconnect.
Automotive Body Control Module (BCM) Load Drivers
The BTS428L2ATMA1's 5.8 A continuous rating and integrated diagnostic feedback make it well suited to body control modules driving exterior lighting, door lock solenoids, and mirror heaters from a 24 V bus. Per the Infineon datasheet, its CMOS-compatible input allows direct connection to a 3.3 V BCM microcontroller GPIO, eliminating level shifters. Embedded load current limitation and overtemperature autorestart remove the need for an external fusible element, reducing BOM and PCB area compared to discrete MOSFET + fuse solutions. The diagnostic pin reports open-load and short-circuit faults back to the BCM so the vehicle's diagnostic trouble code (DTC) system can pinpoint the failing channel.
Recommended
Automotive LED Lighting Modules
The BTS428L2ATMA1 is frequently used as the high-side driver for automotive LED headlamp or tail-lamp modules, where its low standby current preserves battery life when the lamp is off and its integrated overtemperature protection guards the LED string against thermal runaway. With 50 mOhm typical R_DS(on), conduction losses at typical 1-3 A LED currents stay below 0.5 W, removing the need for a discrete heatsink. Compared to a relay-based solution, the BTS428L2ATMA1 provides PWM dimmability via its CMOS input, enabling smooth turn-on and sophisticated daytime-running-light fade patterns without inductive kick.
Recommended
Industrial 24V PLC Digital Outputs
In industrial 24 V PLC and DCS digital output modules, the BTS428L2ATMA1 provides a protected high-side switch capable of directly driving solenoid valves, relay coils, and indicator lamps from a 24 V field rail. Its load-dump and overvoltage clamp let it survive the harsh transients common on factory floors, while its overtemperature autorestart reduces field service calls. The diagnostic feedback supports per-channel fault reporting to the PLC backplane, a critical feature in process automation where a stuck output could go unnoticed. Compared to opto-isolated triac or discrete MOSFET modules, the BTS428L2ATMA1 reduces module size by 30-50 percent.
Recommended
Truck and Bus 24V Power Distribution
Commercial trucks, buses, and heavy equipment operate on a 24 V nominal bus with significant load-dump transients; the BTS428L2ATMA1 is designed for exactly this environment. Its integrated overvoltage clamp protects downstream wiring harnesses from 60 V load-dump spikes common in 24 V systems, while its ground-referenced input allows the cab microcontroller to switch loads in the trailer without ground-loop issues. Reverse-battery protection via the tab lets the device survive accidental reverse polarity at the battery terminal, a real-world failure mode in fleet service. The 5.8 A rating covers most cab and trailer loads - lighting, marker lamps, small motors.
Recommended
HVAC and Seat Control Modules
The BTS428L2ATMA1 drives HVAC damper motors, seat position motors, and mirror-adjustment motors in automotive comfort modules. Per Infineon's datasheet, fast demagnetization of inductive loads ensures that brushed DC motor commutation does not produce damaging voltage spikes at switch-off, extending motor brush life. Its CMOS-compatible input accepts PWM signals directly from the MCU for variable-speed seat or mirror positioning, while its 50 mOhm R_DS(on) keeps the high-side switch cool even under stall-current transients. Diagnostic feedback flags jammed motors before they draw excessive current.
Recommended
Solar Battery Charger Load Disconnect
In solar charge controllers and battery management systems, the BTS428L2ATMA1 serves as the load-side disconnect switch between the battery and DC loads. Its very low standby current preserves battery charge during system idle, and its 24 V rating covers 12 V and 24 V battery banks with margin. Integrated overvoltage and overtemperature protection guard the load during PV input surges or ambient temperature extremes in outdoor enclosures. Diagnostic feedback to the charge controller's MCU enables logging of disconnect events for remote monitoring, important in off-grid solar installations.
Recommended
Recommended Products Summary
Engineering reference data for BTS428L2ATMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BTS428L2NT | BTS134DATMA1 | ITS724GFUMA1 | BSP762TXUMA1 | BSP742RIXUMA1 |
|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Package | PG-TO252-5-11 (DPAK-5) | PG-TO252-5-11 (DPAK-5) - same | PG-TO252-5-11 (DPAK-5) - same | PG-TO252-5-11 (DPAK-5) - same | PG-TO252-5-11 (DPAK-5) - same | PG-TO252-5-11 (DPAK-5) - same |
| Continuous Load Current | 5.8 A | 5.8 A | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| On-State Resistance R_DS(on) | 50 mOhm | 50 mOhm | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Channels | 1 | 1 | 1 | [DATA_NEEDED] | 1 | 1 |
| Diagnostic Feedback | Yes | Yes | Yes | Yes | Yes | Yes |
| Overtemperature Protection | Yes (autorestart) | Yes (autorestart) | Yes | Yes | Yes | Yes |
| Load-Dump / Overvoltage Clamp | Yes | Yes | Yes | Yes | Yes | Yes |
| RoHS / Pb-Free | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Highest continuous current rating in the PG-TO252-5-11 PROFET family (vs BTS134DATMA1)
- Integrated diagnostic feedback in single-channel form factor (vs ITS724GFUMA1)
- Full protection integration eliminates external fuse and TVS (vs Discrete N-channel MOSFET + fuse + TVS solution)
Design Notes
Estimated: at the maximum 5.8 A continuous load and 50 mOhm R_DS(on), conduction loss reaches P = I^2 x R = 5.8^2 x 0.05 = 1.68 W. With a PG-TO252-5-11 (DPAK-5) thermal resistance of roughly 50 C/W on a 1-square-inch copper pour, junction temperature rise above ambient would be ~84 C - acceptable at 25 C ambient but problematic at 85 C under-hood. For high-ambient automotive applications, expand the tab copper pour to at least 2 square inches and consider thermal vias to inner copper layers.
Solder the tab (drain/output) to a generous copper pour - this is both the primary current path to the load and the main thermal path. Use multiple thermal vias under the tab to inner copper planes to reduce junction temperature. Keep the input, GND, and diagnostic traces away from the switching tab trace to minimize capacitive coupling and radiated EMI. Place a 100 nF ceramic bypass capacitor near Vbb/Vs and a TVS diode for additional load-dump margin if the application demands it.
Do not leave the CMOS input pin floating - tie it to GND through a pull-down resistor or drive it actively from the MCU to avoid unintended switch turn-on during MCU reset or power-up sequencing. The diagnostic output pin requires an external pull-up resistor to Vcc; without it fault conditions cannot be read. Ensure reverse-battery scenarios do not exceed the tab's reverse-voltage rating - for unprotected systems add a reverse-polarity MOSFET or Schottky at the supply input.
Compliance Information
Per Infineon product page: green product, RoHS-compliant, Pb-free finish suitable for Pb-free reflow soldering per IPC/JEDEC J-STD-020. Automotive-grade PROFET family, AEC-Q100 qualified.
