BTS50301EJAXUMA1 - 30mΩ Smart High-Side Switch 5A 28V | Infineon
MPN: BTS50301EJAXUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.45 | $34.50 |
| 100 | $2.98 | $298.00 |
| 500 | $2.55 | $1,275.00 |
| 1,000 | $2.2 | $2,200.00 |
BTS50301EJAXUMA1 Overview
A Smart High-Side Power Switch, also called a PROFET (Protected FET), is a power distribution switch that sits between the supply rail and the load, replacing discrete MOSFETs, fuses, and relay circuits. It belongs to the power distribution switch category within Power Management ICs, and integrates protection, diagnostic feedback, and PWM capability into a single SMD device. Compared to a discrete N-MOSFET plus discrete fuse design, a PROFET reduces PCB area by 60-80 percent and provides deterministic fault handling per the AEC-Q100 automotive reliability standard.
Key features include an on-state resistance (RDS(on)) of 30 mΩ typical at 25 °C, a 5 V to 28 V operating supply range, integrated reverse-battery protection up to -28 V, and built-in load current sensing with a proportional IS pin output. The device offers diagnostic feedback through the INH and DEN pins, supports PWM frequencies up to 1 kHz for dimming or speed control, and includes overtemperature, overcurrent, short-circuit, and overvoltage clamp protection. The PG-DSO-8-43-EP exposed-pad package delivers a junction-to-ambient thermal resistance of approximately 36 K/W on a standard 1s2p FR4 board.
The BTS50301EJAXUMA1 architecture combines a vertical DMOS output stage, charge-pump gate driver, bandgap-referenced protection comparators, and a current-mirror sense element. The sense current (kILIS ratio) typically runs 1:3300 to 1:6600 of the load current, enabling accurate fault detection without intrusive shunt resistors. Reverse-battery protection is achieved by substrate-switching techniques rather than an external diode, minimizing voltage drop and power dissipation.
Typical applications include automotive body electronics (door modules, seat controllers, mirror adjusters, lighting), industrial PLC outputs, 24 V truck and bus power distribution, and any system requiring protected 12 V or 24 V load driving. The device is particularly suited for applications where fault reporting back to a microcontroller is mandatory, since the IS pin provides analog load-diagnostics in real time.
When designing with the BTS50301EJAXUMA1, ensure the input supply is decoupled with at least 100 nF close to the Vbb pin and provide adequate copper area for thermal dissipation at high continuous currents. The DEN and INH pins must be driven per the timing diagram in the manufacturer datasheet; floating the INH pin disables the channel.
This page synthesizes distributor pricing, drop-in alternative part numbers, application reference designs, and practical design notes that complement - but do not replace - the manufacturer datasheet for the BTS50301EJAXUMA1.
Drop-in alternatives for BTS50301EJAXUMA1 — 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 BTS50301EJAXUMA1 (same form factor and footprint) — differing in Package, Diagnostic Output, Topology, Product Type, Protection Features.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
BTS5030-1EJA
✅ Drop-In📋 Reference alternative (not in catalog)
ITS4100SSJNXUMA1
✅ Drop-In✓ In Stock
$0.89 / Unit
View Datasheet →ITS4040DEPDXUMA1
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$2.12 / Unit
View Datasheet →ITS4090QEPDXUMA1
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →ITS4200SSJDXUMA1
✅ Drop-In✓ In Stock
$0.98 / Unit
View Datasheet →NCV8460ADR2G
✅ Drop-In📋 Reference alternative (not in catalog)
ITS4130QEPDXUMA1
✅ Drop-In✓ In Stock
$1.88 / Unit
View Datasheet →BTS50301EJAXUMA1 Maximum Ratings & Electrical Characteristics
| Product Type | Smart High-Side Power Switch (PROFET) |
| Number of Channels | 1 |
| On-State Resistance (RDS(on)) | 30 mΩ typical |
| Nominal Operating Voltage | 28 V |
| Operating Supply Range | 5 V to 28 V |
| Continuous Load Current | 5 A |
| Maximum Load Current | 36 A (per Mouser listing, pulsed) |
| Switch Configuration | 1:1 N-Channel high-side |
| Reverse Battery Protection | Up to -28 V |
| Diagnostic Output | Current sense (IS pin) with DEN/INH control |
| Protection Features | Overtemperature, overcurrent, short-circuit, overvoltage clamp |
| PWM Capability | Up to 1 kHz |
| Package | PG-DSO-8-43-EP (exposed pad) |
| Operating Temperature | -40 °C to +150 °C junction |
| Automotive Qualification | AEC-Q100 qualified |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
BTS50301EJAXUMA1 Pin Configuration
| Pin 1 | OUT — Power output to load |
| Pin 2 | Vbb — Battery supply input (5-28 V) |
| Pin 3 | GND — Ground reference |
| Pin 4 | INH — Inhibit input (active high enables channel) |
| Pin 5 | DEN — Diagnostic enable input |
| Pin 6 | IS — Current sense output (proportional to load current) |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | EP — Exposed pad - thermal pad, connect to copper pour |
Typical Applications
BTS50301EJAXUMA1 is suitable for 6 applications: Automotive Door Module Load Driver, Automotive Lighting (HID/LED Headlamp Driver), 24V Truck and Bus Power Distribution, Industrial PLC Digital Output Module, Seat Heater and Seat Adjuster Driver, HVAC Blower and Flap Motor Driver.
Automotive Door Module Load Driver
The BTS50301EJAXUMA1 is purpose-built for automotive door modules that drive central locking motors, mirror-adjust DC motors, and puddle-light LEDs. Its 30 mΩ RDS(on) minimizes conduction loss when switching up to 5 A continuously, while the IS pin provides real-time load-current telemetry to the body-control module for jam detection and stall diagnostics. Compared with discrete MOSFET-plus-relay designs, the integrated -28 V reverse-battery protection eliminates an external Schottky diode and reduces PCB area by roughly 70 percent, a critical factor for the compact door-module enclosure.
Recommended
Automotive Lighting (HID/LED Headlamp Driver)
In 12 V automotive front-lighting modules, the BTS50301EJAXUMA1 drives HID ballasts and high-brightness LED strings via PWM dimming up to 1 kHz. The 5-28 V supply range covers cranking transients and load-dump surges up to 40 V (clamped internally). The DEN pin allows the headlamp control unit to disable the channel during fault conditions without removing power, while the IS pin enables open-load detection to meet ISO 26262 functional-safety requirements for exterior lighting.
Recommended
24V Truck and Bus Power Distribution
Commercial 24 V truck and bus systems use the BTS50301EJAXUMA1 for body-controller power distribution including marker lamps, wiper motors, and seat heaters. The 28 V nominal rating gives margin above 24 V nominal while the -28 V reverse-battery protection withstands jump-start polarity errors common in fleet service. The 5 A continuous rating handles seat-heater pads (typically 4-5 A per zone) and the integrated overtemperature shutdown protects against blocked-vent thermal stress in cab-mounted modules.
Recommended
Industrial PLC Digital Output Module
Industrial 24 V PLC digital-output modules use the BTS50301EJAXUMA1 to switch solenoid valves, indicator lamps, and small contactor coils. The integrated diagnostic current sense (IS pin) feeds back to the PLC CPU for open-load and short-circuit detection per IEC 61131-2, eliminating the external opto-isolator plus sense-resistor chain used in legacy designs. The 5-28 V range accepts all standard 24 V industrial supplies including those with 10 percent tolerance and brief 35 V transients.
Recommended
Seat Heater and Seat Adjuster Driver
Body-control modules for electric seats drive heating pads (5-10 A pulsed) and DC seat-adjustment motors (3-5 A continuous) using PROFET switches like the BTS50301EJAXUMA1. The 1 kHz PWM capability enables smooth temperature control on heating elements without audible noise, and the integrated current sense detects open heating coils or jammed motors within 100 ms, allowing the body-control ECU to log a fault and illuminate the dashboard warning per OEM requirements.
Recommended
HVAC Blower and Flap Motor Driver
Climate-control modules use the BTS50301EJAXUMA1 to drive HVAC blower motors and mode-door actuators with PWM speed control. The 30 mΩ RDS(on) keeps conduction loss low even at the 5 A continuous rating, and the integrated overtemperature protection prevents thermal runaway if the blower stalls due to a frozen shaft or debris. The exposed-pad package provides the thermal headroom needed for under-dash mounting where ambient temperatures reach 85 °C in summer.
Recommended
Recommended Products Summary
Engineering reference data for BTS50301EJAXUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BTS5030-1EJA | ITS4100SSJNXUMA1 | ITS4040DEPDXUMA1 | NCV8460ADR2G |
|---|---|---|---|---|---|
| Package | PG-DSO-8-43-EP | PG-DSO-8-43-EP - same | PG-DSO-8-43-EP - same | PG-DSO-8-43-EP - same | SOIC-8 EP - same family (verify pinout) |
| Brand | Infineon | Infineon | Infineon | Infineon | onsemi |
| On-State Resistance (RDS(on)) | 30 mΩ | 30 mΩ | ~35-40 mΩ | 40 mΩ | ~30-35 mΩ |
| Continuous Load Current | 5 A | 5 A | ~4 A | ~3 A | ~5 A |
| Operating Voltage Range | 5 V to 28 V | 5 V to 28 V | 5 V to 28 V | 5 V to 28 V | 5 V to 28 V |
| Current Sense (IS pin) | Yes (kILIS proportional) | Yes | Yes | Yes | Yes |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes | Yes |
| Reverse Battery Protection | Up to -28 V | Up to -28 V | Up to -28 V | Up to -28 V | Up to -28 V |
Key Differentiators
- Lowest RDS(on) in the PROFET single-channel 8-pin EP family (vs ITS4040DEPDXUMA1)
- Integrated current sense with kILIS proportional output (vs ISP772T)
- Cross-brand drop-in compatible alternative available (vs NCV8460ADR2G)
Design Notes
At 5 A continuous load and 30 mΩ RDS(on), the BTS50301EJAXUMA1 dissipates approximately 0.75 W in steady state. The PG-DSO-8-43-EP exposed pad must be soldered to at least 1 square inch of 2 oz copper on the top layer, with thermal vias to a bottom-layer pour, to keep junction temperature below 125 °C at 85 °C ambient. Estimated: input values RDS(on)=30 mΩ, ILOAD=5 A, theta_JA=36 K/W, TAMB=85 °C yields TJ ≈ 112 °C with the recommended footprint.
Place the Vbb decoupling capacitor (≥100 nF, X7R ceramic) within 5 mm of the Vbb pin to suppress supply transients during PWM switching. The IS pin traces should be routed away from the OUT switching node to avoid capacitive coupling that distorts the sense current. A 10 kΩ pull-down on IS prevents floating-state errors when the diagnostic pin is disabled.
Floating the INH pin disables the output stage - always tie INH to Vlogic via a 10 kΩ pull-up if driven by an open-drain GPIO. Do not exceed 36 V on Vbb even transiently, as the overvoltage clamp will latch and require a power cycle to recover. The exposed pad is the main thermal path and the main GND return; insufficient solder connection here leads to thermal runaway under continuous load.
Compliance Information
AEC-Q100 qualified per Mouser/FindIC listings. RoHS compliant. Halogen-free status not explicitly stated in verified data - set to unknown.
