BTS4140NHUMA1 - Smart High-Side Switch 200mA SOT-223 | Infineon
MPN: BTS4140NHUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.18 | $11.80 |
| 100 | $0.95 | $95.00 |
| 500 | $0.79 | $395.00 |
| 1,000 | $0.66 | $660.00 |
| 2,500 | $0.58 | $1,450.00 |
BTS4140NHUMA1 Overview
A high-side switch is a power distribution topology in which the load is connected between ground and the MOSFET drain, and the switch sits between the positive supply rail and the load. Compared with low-side switching, high-side switches protect the load from shorts to ground, allow ground-referenced loads (lamps, solenoids, relays), and provide a more intuitive fault response. The BTS4140NHUMA1 belongs to the MINI-PROFET sub-family, optimized for compact PCB footprints and modest current levels up to about 200 mA.
Key features include a typical on-resistance of approximately 1.2 ohm at 25 C, an operating voltage range of about 6 V to 62 V (with load-dump transient tolerance), current-controlled CMOS-compatible input, status flag output, and integrated clamping for inductive load turn-off. The PG-SOT223-4 package exposes a large thermal tab that doubles as the drain terminal and provides low thermal resistance for heat spreading into the PCB copper.
The internal architecture combines a charge pump to drive the gate of the vertical N-channel MOSFET, a current-sense element, bandgap-based references for the protection comparators, and a status generator that pulls the diagnostic pin low in fault conditions. This monolithic integration reduces external BOM count (no flyback diode required for small inductive loads) and simplifies AEC-Q100-style qualification for the host module.
Typical applications include automotive body electronics (door locks, mirror heaters, small lamp drivers, sensor supply switching), industrial 24V PLC discrete outputs, relay replacement in HVAC controls, and any 12V/24V subsystem needing protected, diagnostic-enabled high-side switching. The BTS4140NHUMA1 is especially well suited where PCB space is constrained but full PROFET protection is required.
When designing with this part, place the PG-SOT223-4 thermal tab on a copper area of at least 1 cm squared to keep junction temperature within the 150 C Tj(max) under worst-case load-dump and ambient conditions. Always include a reverse-polarity protection block (P-MOSFET or Schottky) on the supply rail because the BTS4140NHUMA1 does not block reverse battery voltage on its own.
This page synthesizes distributor pricing, SOT-223-4 drop-in alternatives, and practical thermal/PCB design notes that are not present in the manufacturer datasheet alone, accelerating both component selection and layout review.
Drop-in alternatives for BTS4140NHUMA1 — 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 BTS4140NHUMA1 (same form factor and footprint) — differing in Package, Topology, Continuous Load Current, Operating Temperature Range, Automotive Qualification.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ITS4140NHUMA1
✅ Drop-In✓ In Stock
$0.72 / Unit
View Datasheet →BTS3028SDLATMA1
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →BTS452TATMA1
✅ Drop-In✓ In Stock
$1.12 / Unit
View Datasheet →BTS3134NHUMA1
✅ Drop-In✓ In Stock
$0.78 / Unit
View Datasheet →BTS4141N
✅ Drop-In📋 Reference alternative (not in catalog)
BTS4140NHUMA1 Maximum Ratings & Electrical Characteristics
| Product Type | Smart High-Side Power Switch |
| Topology | 1:1 N-Channel High-Side |
| Number of Channels | 1 |
| Continuous Load Current | 200 mA |
| On-Resistance (Ron, typ @ 25 C) | 1.2 ohm |
| Operating Voltage Range | 6 V to 62 V |
| Load Dump Tolerance | Yes (overvoltage protection) |
| Input Type | Current-controlled CMOS-compatible |
| Diagnostic Output | Status flag (active low in fault) |
| Protection Features | Current limit, short-circuit shutdown, thermal shutdown, overvoltage (load dump), undervoltage shutdown |
| Inductive Load Clamping | Integrated (internal Vds clamp) |
| Operating Temperature Range | -40 C to +150 C (Tj) |
| Package | PG-SOT223-4 (TO-261-4) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
BTS4140NHUMA1 Pin Configuration
| Pin 1 | IN — Logic input (current-controlled, CMOS-compatible) |
| Pin 2 | GND — Ground reference |
| Pin 3 | STATUS / DIAG — Diagnostic output (active low in fault) |
| Pin 4 | OUT / Vbb / Tab — Load output / Drain terminal / exposed thermal tab |
Safe Operating Area - BTS4140NHUMA1
Typical Applications
BTS4140NHUMA1 is suitable for 6 applications: Automotive Body Electronics - Door Lock Actuator Driver, Automotive Mirror Heater Driver, Industrial 24V PLC Discrete Output, Relay Replacement in HVAC Controls, Sensor Power Supply Switching, LED Indicator and Small Lamp Driver.
Automotive Body Electronics - Door Lock Actuator Driver
The BTS4140NHUMA1 suits automotive door-lock actuator switching because its 200 mA continuous rating matches the lock-motor inrush, while integrated current limit and thermal shutdown protect the harness from stall-current faults. The 62 V load-dump rating covers jump-start and alternator transient events. The status output lets the BCM distinguish a stuck actuator from a wiring fault.
Recommended
Automotive Mirror Heater Driver
Heated side mirrors typically draw 100-180 mA, fitting the BTS4140NHUMA1's 200 mA continuous rating with margin. The integrated overvoltage and short-circuit protection prevents mirror-heater wiring faults from damaging the BCM. The PG-SOT223-4 thermal tab spreads dissipation across the door-module PCB copper, eliminating a discrete heatsink.
Recommended
Industrial 24V PLC Discrete Output
The BTS4140NHUMA1 operates up to 62 V and provides diagnostic feedback, ideal for industrial 24V PLC discrete output modules that must report open-load and short-circuit faults back to a fieldbus master. The current-controlled CMOS input simplifies opto-coupler-less interface to 3.3 V or 5 V logic, and PG-SOT223-4 supports reflow assembly compatible with standard SMT lines.
Recommended
Relay Replacement in HVAC Controls
Use the BTS4140NHUMA1 to replace an electromechanical relay in HVAC damper or valve actuators: it eliminates coil inrush, contact bounce, and audible click, while providing precise current limit and overcurrent shutdown. With 62 V load-dump tolerance and 200 mA continuous rating, it handles small solenoid loads in both 12V automotive and 24V industrial HVAC systems.
Recommended
Sensor Power Supply Switching
The BTS4140NHUMA1 cleanly switches 12V/24V power to O2 sensors, pressure transducers, and other analog front-end loads, providing short-circuit and reverse-load protection while its diagnostic flag signals fault states to the ECU. The 1.2 ohm Ron produces only 48 mW loss at 200 mA, eliminating the need for a heatsink in tight engine-bay enclosures.
Recommended
LED Indicator and Small Lamp Driver
Drive interior lamps, status LEDs, and small incandescent bulbs directly with the BTS4140NHUMA1 in PG-SOT223-4. The current limit prevents inrush damage on cold filaments, the thermal shutdown protects against PCB hotspots behind dashboards, and the diagnostic pin lets the BCM detect open filaments in compliance with bulb-out monitoring requirements.
Recommended
Recommended Products Summary
Engineering reference data for BTS4140NHUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ITS4140NHUMA1 | BTS3028SDLATMA1 | BTS452TATMA1 | BTS3134NHUMA1 | BTS4141N |
|---|---|---|---|---|---|---|
| Package | PG-SOT223-4 (TO-261-4) | PG-SOT223-4 (TO-261-4) - same | PG-SOT223-4 (TO-261-4) - same | PG-SOT223-4 (TO-261-4) - same | PG-SOT223-4 (TO-261-4) - same | PG-SOT223-4 (TO-261-4) - same |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Continuous Load Current | 200 mA | 200 mA | ~6 A (higher current) | ~1.7 A (higher current) | ~600 mA (higher current) | ~600 mA (higher current) |
| Operating Voltage | 6 V to 62 V | 6 V to 62 V | 6 V to 62 V | 6 V to 62 V | 6 V to 62 V | 6 V to 62 V |
| On-Resistance (typ) | 1.2 ohm | 1.2 ohm | ~30 mohm (lower Ron) | ~80 mohm (lower Ron) | ~300 mohm (lower Ron) | ~350 mohm (lower Ron) |
| Diagnostic Output | Yes (status flag) | Yes (status flag) | Yes (status flag) | Yes (status flag) | Yes (status flag) | Yes (status flag) |
| Load-Dump / Overvoltage Protection | Yes (integrated) | Yes | Yes | Yes | Yes | Yes |
| Qualification Focus | Automotive (Classic PROFET 24V) | Industrial | Automotive | Automotive | Automotive | Automotive |
Key Differentiators
- Lower current / lower dissipation envelope for compact PCB designs (vs BTS452TATMA1)
- Industrial-grade drop-in option exists on same footprint (vs ITS4140NHUMA1)
- Smaller 1.2 ohm Ron for sub-200 mA loads vs MINI-PROFET predecessors (vs BTS3134NHUMA1)
Design Notes
The PG-SOT223-4 thermal tab is the drain terminal and must be soldered to a copper pour of at least 1 cm squared (1 oz copper) to keep Tj below 150 C at full 200 mA continuous load. Estimated: at Ron = 1.2 ohm and 200 mA load, conduction loss is about 48 mW which is trivial, but during short-circuit events the current-limit block can drive much higher dissipation for several milliseconds until thermal shutdown trips, so adequate copper is essential.
Place input bypass (100 nF ceramic) close to the IN pin and a reverse-polarity P-MOSFET (or Schottky) on Vbb before the BTS4140NHUMA1 because the device does not block reverse-battery voltage on its own. The status pin requires a pull-up resistor (typically 10 kohm to Vcc of the host microcontroller) since it is an open-drain output.
Do not operate the BTS4140NHUMA1 in linear (analog) mode by feeding a partial-voltage PWM on IN; use full on/off switching or a fast PWM (>1 kHz) at the rated duty cycle. Slow PWM ramps confuse the current-limit comparator and can trigger false short-circuit shutdowns. Always verify the host firmware respects the device's status-pin timing per the datasheet timing diagram before disabling related actuators.
Route the STATUS trace away from the OUT/drain tab and any switching-node copper to avoid capacitive coupling that can falsely assert the diagnostic flag. Keep the GND return via a short trace or via-array directly to the system ground plane, since ground-bounce at high di/dt during turn-off can re-trigger the undervoltage comparator on noisy rails.
Compliance Information
RoHS and REACH compliant per Infineon product page. AEC-Q100 automotive qualified (Classic PROFET 24V family).
