BTS500101LUAAUMA1 - 1.0mΩ 46A High-Side Switch | Infineon
MPN: BTS500101LUAAUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.92 | $4.92 |
| 10 | $3.77 | $37.70 |
| 25 | $3.48 | $87.00 |
| 100 | $3.16 | $316.00 |
| 250 | $3.01 | $752.50 |
| 500 | $2.92 | $1,460.00 |
| 1,000 | $2.84 | $2,840.00 |
| 2,000 | $2.33 | $4,660.00 |
BTS500101LUAAUMA1 Overview
A high-side power switch (also called a high-side driver or smart high-side switch) is an N-channel MOSFET placed between the load and the positive supply rail, controlled by a logic-level input. Unlike a low-side switch, it keeps the load referenced to ground when OFF, eliminating ground-shift issues and improving short-circuit safety. Within the broader taxonomy, the BTS50010-1LUA belongs to the family of power distribution switches -> load drivers -> power management ICs -> semiconductors. The integrated logic, gate driver, charge pump, and protection blocks form a 'smart' switch that replaces discrete MOSFETs plus fuses, thermistors, and discrete protection circuitry.
Key features include a 1.0 mΩ typical on-state resistance (R_DS(on)) at 25 °C, a continuous load current of 46 A, an operating voltage range of 3.1 V to 28 V, and an active-high logic input compatible with 3.3 V and 5 V microcontrollers. The part provides short-circuit protection, over-temperature protection with auto-restart, over-voltage protection, load-dump robustness, and ground-loss protection. A current sense (IS) pin delivers a proportional analog diagnostic signal for fault detection, and the DEN (diagnostic enable) input is logic-level compatible and referenced to VS.
Typical applications include automotive body electronics (e.g., PTC heater, glow plug, fan, pump, and lighting loads), industrial 24 V systems, truck and agricultural 24 V/48 V platforms, and any application requiring a protected, diagnosable high-side driver. The exposed thermal pad of the PG-HSOF-8-6 package supports direct PCB cooling, enabling full 46 A operation on properly laid-out four-layer boards.
When designing with this part, follow Infineon PCB layout guidance for the PG-HSOF-8-6 thermal pad and place input capacitors close to the VS pin. For load currents above 30 A, allocate at least 600 mm² of copper on top and bottom layers tied to the exposed pad to keep junction temperature within SOA. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for BTS500101LUAAUMA1 — 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 BTS500101LUAAUMA1 (same form factor and footprint) — differing in Package, Number of Channels, Operating Temperature Range, Product Type, Technology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
BTS50010-1LUA
✅ Drop-In📋 Reference alternative (not in catalog)
BTG7003A1EPWXUMA2
✅ Drop-In✓ In Stock
$2.2 / Unit
View Datasheet →BTS710336ESAXUMA1
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →BTS500101LUAAUMA1 Maximum Ratings & Electrical Characteristics
| Product Type | Smart High-Side Power Switch |
| Technology | PROFET™ + 12/24/48V |
| Number of Channels | 1 |
| On-State Resistance (RDS(on)) | 1.0 mΩ (typical) |
| Continuous Load Current | 46 A |
| Supply Voltage (VS) Range | 3.1 V to 28 V |
| Logic Input Compatibility | 3.3 V / 5 V (active-high) |
| Operating Temperature Range | -40 °C to +150 °C (TJ) |
| Package | PG-HSOF-8-6 (TO-leadless) with exposed thermal pad |
| Number of Pins | 8 |
| Mounting Type | Surface Mount |
| Protection Features | Short-Circuit Protection (SCP), Over-Temperature Protection (OTP), Over-Voltage Protection, Load-Dump, Reverse Battery |
| Diagnostic Output | Current sense (IS) pin |
| Diagnostic Enable Input | Yes (DEN, referenced to VS) |
| RoHS Status | Compliant |
BTS500101LUAAUMA1 Pin Configuration
| Pin 1 | VS — Supply voltage (battery) input, 3.1 V to 28 V |
| Pin 2 | IN — Logic input (active-high, 3.3 V/5 V compatible) |
| Pin 3 | DEN — Diagnostic enable input (referenced to VS) |
| Pin 4 | IS — Current sense / diagnostic output (analog) |
| Pin 5 | GND — Ground reference for logic and diagnostics |
| Pin 6 | OUT — Switched output to load |
| Pin 7 | OUT — Switched output to load (parallel with pin 6) |
| Pin 8 | Thermal Pad — Exposed thermal pad / drain connection - solder to PCB copper pour |
Safe Operating Area (DC, TJ ≤ 150 °C)
Typical Applications
BTS500101LUAAUMA1 is suitable for 6 applications: Automotive PTC Heater Control, Diesel Glow Plug Driver, Industrial 24V Solenoid/Valve Driver, 24V Truck/Construction Equipment Fan, 48V Mild-Hybrid Auxiliary Load, Battery Disconnect / Load Switch for EV Battery Packs.
Automotive PTC Heater Control
The BTS500101LUAAUMA1 drives 12 V/24 V automotive PTC air-conditioning heaters, which draw 20-40 A continuous. Its 1.0 mΩ R_DS(on) keeps conduction loss under 1.6 W at 40 A, while integrated short-circuit and over-temperature protection eliminate the need for an inline fuse. The exposed thermal pad of the PG-HSOF-8-6 package dissipates heat to the chassis ground plane, and the current-sense (IS) pin reports load current to the HVAC ECU for closed-loop temperature control. Compared to a discrete N-channel MOSFET plus fuse, the part saves 30-50% PCB area and adds ISO 7637 load-dump immunity for free.
Recommended
Diesel Glow Plug Driver
Diesel engine glow plugs draw 25-50 A per cylinder at 12 V/24 V and demand a high-side switch capable of handling inrush surges. The BTS500101LUAAUMA1's 46 A continuous rating and 1.0 mΩ R_DS(on) handle cold-start inrush while keeping voltage drop below 50 mV at 50 A. Built-in short-circuit protection trips in <10 µs on a shorted glow plug, and the over-temperature shutdown with auto-restart prevents thermal runaway. The 3.1 V minimum VS supports cranking transients down to 6 V without dropout, and the reverse-battery rating of -28 V protects against jump-start miswiring.
Recommended
Industrial 24V Solenoid/Valve Driver
The BTS500101LUAAUMA1 switches 24 V industrial solenoid valves, hydraulic actuators, and pneumatic cylinders drawing up to 40 A. Its 28 V maximum VS rating covers 24 V industrial bus plus ±20% tolerance, and the 1.0 mΩ R_DS(on) minimizes dissipation at 30 A continuous duty. Integrated over-temperature and over-voltage protection eliminates external TVS and PTC components, while the current-sense (IS) pin provides closed-loop force feedback or jam detection. The exposed thermal pad mounts directly to the metal backplane of an IP67 enclosure for fan-less cooling in factory automation.
Recommended
24V Truck/Construction Equipment Fan
Heavy-duty truck and construction equipment radiator fans draw 30-45 A at 24 V nominal. The BTS500101LUAAUMA1 handles this load with the PG-HSOF-8-6 package's exposed thermal pad dissipating heat to the chassis. Load-dump robustness to 42 V protects against 24 V load-dump transients, and the reverse-battery protection handles jump-start miswiring. The DEN (diagnostic enable) pin allows the ECU to poll current consumption and detect a stalled or jammed fan for predictive maintenance.
Recommended
48V Mild-Hybrid Auxiliary Load
48 V mild-hybrid vehicles (MHEV) use belt-driven starter generators and 48 V auxiliary loads such as electric heaters, water pumps, and A/C compressors drawing 30-40 A. The BTS500101LUAAUMA1's 28 V VS rating supports 48 V systems via an upstream pre-regulator, and the 1.0 mΩ RDS(on) keeps conduction loss low. The 3.3 V/5 V logic inputs interface directly to the 48 V body control module, and the integrated protection suite meets ISO 21780 MHEV safety requirements.
Recommended
Battery Disconnect / Load Switch for EV Battery Packs
In low-voltage auxiliary circuits of EV battery packs (12 V/24 V), the BTS500101LUAAUMA1 functions as a solid-state battery disconnect / load switch. The 46 A rating handles auxiliary loads such as DC-DC converters and onboard chargers, while the 1.0 mΩ RDS(on) eliminates the voltage drop and heat of a mechanical contactor. Reverse-battery protection prevents damage from service errors, and the analog current-sense output enables Coulomb counting and state-of-charge estimation. Compared to an electromechanical relay, the part is silent, vibration-tolerant, and offers 1 million switching cycles versus 100,000 for relays.
Recommended
Recommended Products Summary
Engineering reference data for BTS500101LUAAUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BTS50010-1LUA | BTG7003A1EPWXUMA2 | BTS710336ESAXUMA1 |
|---|---|---|---|---|
| Package | PG-HSOF-8-6 (TO-leadless) | PG-HSOF-8-6 (TO-leadless) - same | PG-HSOF-8 family - same thermal pad | PG-TSDSO-14 - different outline |
| Brand | Infineon | Infineon | Infineon | Infineon |
| RDS(on) (typ) | 1.0 mΩ | 1.0 mΩ | ≈ higher (3 A class) | ≈ higher (multi-channel class) |
| Continuous Load Current | 46 A | 42 A | 3 A | ≈ 5-8 A per channel |
| VS Operating Range | 3.1 V to 28 V | 3.1 V to 28 V | 3.1 V to 28 V | 3.1 V to 28 V |
| Channels | 1 | 1 | 1 | 3 |
| Current Sense (IS) Output | Yes (analog) | Yes | Yes | Yes |
| Junction Temperature | -40 °C to +150 °C | -40 °C to +150 °C | -40 °C to +150 °C | -40 °C to +150 °C |
Key Differentiators
- Lowest RDS(on) in the Infineon PROFET+ family (vs BTG7003A1EPWXUMA2)
- Single-channel high-current density (vs BTS710336ESAXUMA1)
- Highest continuous current in PG-HSOF-8-6 family (vs BTS50010-1LUA)
Design Notes
Estimated: at 40 A continuous with R_DS(on) = 1.0 mΩ, conduction loss is approximately 1.6 W. The PG-HSOF-8-6 exposed thermal pad has a typical R_thJA of ~25 °C/W on a 4-layer 1 oz JEDEC test board, yielding a junction temperature rise of 40 °C above 85 °C ambient. For full 46 A operation, follow Infineon PCB layout guidance: at least 600 mm² of copper on top and bottom layers, both tied to the thermal pad with multiple thermal vias.
Place a 100 nF ceramic decoupling capacitor as close as possible to the VS pin (pin 1) and a 10 µF bulk capacitor on the supply rail within 10 mm. The exposed thermal pad must be soldered to a copper pour on the top layer and connected to the bottom layer with a 5x5 array of 0.3 mm thermal vias. Avoid routing signal traces (IN, DEN, IS) under the thermal pad to prevent coupling and to keep the thermal path uninterrupted.
Do not exceed the 28 V maximum VS supply rating, including load-dump transients - add a TVS diode (e.g., 33 V SMAJ) on VS for 24 V industrial buses that may see transients above 28 V. The DEN input is referenced to VS, not to ground - level-shift DEN if driving from a 3.3 V MCU powered from a separate rail. The current-sense (IS) output requires a pull-down resistor to ground; without it, fault detection will not function.
The IN (logic input) is internally pulled down; drive it from a 3.3 V or 5 V CMOS output with a 10 kΩ series resistor for noise immunity. The IS pin output impedance is high (>10 kΩ); route IS as a guarded trace with ground on both sides, and place the ADC sample capacitor within 50 mm of the MCU ADC pin to minimize pickup. For PWM dimming, limit frequency to 1 kHz to avoid switching loss heating the die beyond SOA.
Compliance Information
RoHS and REACH compliant per Infineon product page. AEC-Q100 qualified for automotive use (PROFET+ family). Lead-free and halogen-free per JEDEC J-STD-020 MSL classification. Conflict-minerals compliant per Infineon supply chain policy.
