BTS3110NHUMA1 - 42V 1.4A Smart Low-Side Switch | Infineon
MPN: BTS3110NHUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.65 | $16.50 |
| 100 | $1.42 | $142.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $0.98 | $980.00 |
| 3,000 | $0.82 | $2,460.00 |
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View Datasheet →BTS3110NHUMA1 Maximum Ratings & Electrical Characteristics
| Product Type | Smart Low-Side Power Switch |
| Family | Classic HITFET |
| Number of Channels | 1 |
| Switch Type | N-Channel (1:1) |
| Maximum Drain-to-Source Voltage (VDS max) | 42 V |
| Continuous Drain Current | 1.4 A |
| On-Resistance (RDS(on) typ) | 200 mOhm |
| Input Logic Compatibility | TTL / CMOS (3.3 V and 5 V) |
| Status Flag Output | Open-drain diagnostic output |
| Protection Features | ESD, thermal shutdown, over-load current limit |
| Operating Temperature Range | -40 C to +150 C |
| Package | PG-SOT223-4 (SOT-223-4) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Automotive Qualified | Yes - 12 V automotive applications |
BTS3110NHUMA1 Pin Configuration
| Pin 1 | IN — Gate input - logic-level control signal from MCU |
| Pin 2 | D — Drain - connected to load; internally bonded to tab |
| Pin 3 | ST — Status output - open-drain diagnostic flag |
| Pin 4 | GND — Source / Ground - return path |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
BTS3110NHUMA1 is suitable for 6 applications: 12 V Automotive Relay Replacement, Automotive Lamp and LED Driver, Industrial 24 V PLC Output Module, Solenoid and Valve Driver, Small DC Motor and Fan Driver, Resistive Heater Element Switch.
12 V Automotive Relay Replacement
The BTS3110NHUMA1 directly replaces electromechanical relays driving 12 V automotive loads up to 1.4 A. Its 42 V VDS rating absorbs load-dump transients per ISO 7637-2, while integrated thermal shutdown and current-limit protect the PCB during locked-rotor events. Engineers typically use it on body-control modules for horn, lamp, and small-solenoid drivers, eliminating relay click noise and contact bounce while providing a logic-level diagnostic flag for ECU feedback. Drain tab tied to load positive; source to GND; gate to MCU GPIO through 100 kohm pulldown.
Recommended
Automotive Lamp and LED Driver
For driving 12 V incandescent bulbs, LED strings, and signal lamps up to 1.4 A, the BTS3110NHUMA1 provides cold-filament inrush handling via internal current limiting and a low 200 mOhm on-state resistance that keeps conduction loss under 1 W at full load. The open-drain status output feeds back to the ECU for open-load and short-to-GND detection, enabling ISO 26262 lamp-out diagnostics. Mounting the drain tab on at least 1 square inch of copper keeps junction temperature below 150 C during continuous-ON duty.
Recommended
Industrial 24 V PLC Output Module
In industrial 24 V PLC digital output modules, the BTS3110NHUMA1 operates as a low-side driver with the drain tab tied to the 24 V load. Its 42 V max VDS provides margin against 24 V transient bursts per IEC 61131-2, and the 1.4 A continuous current covers most solenoid and small-motor switching needs. The logic-level gate input interfaces directly to 3.3 V or 5 V PLC logic with no driver stage. Conduction loss at 24 V/1 A is approximately 200 mW, well within the PG-SOT223-4 thermal limit on a moderate copper pour.
Recommended
Solenoid and Valve Driver
The BTS3110NHUMA1's 200 mOhm RDS(on) and 1.4 A continuous current suit 12 V hydraulic and pneumatic solenoid valves in industrial process control. The integrated avalanche energy rating handles the inductive kickback of small valve coils without an external free-wheeling diode, reducing BOM cost. The diagnostic status output reports open-load conditions when a connector detaches, supporting Industry 4.0 predictive maintenance schemes. PCB layout should keep the drain tab on at least 50 sq mm copper for sustained-on duty.
Recommended
Small DC Motor and Fan Driver
Driving small 12 V brushed DC motors, fans, and pumps up to 1.4 A is a typical use case for the BTS3110NHUMA1. The internal current limiter protects the motor during stall conditions, while the thermal shutdown prevents catastrophic failure if the fan impeller is blocked. PWM speed control is achievable by driving the gate input with a 3.3 V or 5 V PWM signal at up to 1 kHz; for higher PWM frequencies, an external gate driver is recommended. Reverse-battery protection requires an external P-channel MOSFET on the supply rail.
Recommended
Resistive Heater Element Switch
For 12 V resistive heaters, seat heaters, and mirror heaters drawing under 1.4 A, the BTS3110NHUMA1 serves as a logic-controlled low-side switch. Its 200 mOhm on-resistance dissipates only 200 mW at 1 A, making thermal management straightforward in confined body-control-module locations. PWM dimming is supported via the gate input, allowing variable heat output while maintaining diagnostic feedback via the status flag. The 42 V VDS rating ensures survival of jump-start and load-dump transients common in automotive electrical environments.
Recommended
Recommended Products Summary
Engineering reference data for BTS3110NHUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BTS3011TEATMA1 | BTS6133DAUMA1 | BSP315PH6327XTSA1 | BSP316PH6327XTSA1 | BTS500801TEAAUMA1 |
|---|---|---|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Package | PG-SOT223-4 | PG-TO-252 (DPAK) | PG-TO-252 (DPAK) | PG-SOT223-4 (same) | PG-SOT223-4 (same) | PG-TO-252 (DPAK) |
| Switch Topology | Low-side N-channel smart switch | Low-side N-channel smart switch | High-side PROFET | P-channel discrete MOSFET | N-channel discrete MOSFET | High-side PROFET |
| Maximum VDS / VDS(load) | 42 V | 42 V | 42 V (high-side) | 60 V | 200 V | 42 V (high-side) |
| Continuous Drain Current | 1.4 A | 2.3 A | 4 A | 1.4 A | 1.0 A | 8 A |
| RDS(on) typical | 200 mOhm | 100 mOhm | 50 mOhm | 600 mOhm | 800 mOhm | 30 mOhm |
| Integrated Protection | ESD, thermal shutdown, current limit | ESD, thermal shutdown, current limit | ESD, thermal, current limit, reverse battery | None (discrete MOSFET) | None (discrete MOSFET) | ESD, thermal, current limit, diagnostic |
| Status / Diagnostic Output | Open-drain status flag | Open-drain status flag | Current-sense analog output | None | None | Current-sense analog output |
| Automotive Qualified | Yes (12 V automotive) | Yes | Yes (AEC-Q100) | Industrial grade | Industrial grade | Yes (AEC-Q100) |
| Approximate Unit Price (qty-1000) | USD 0.98 | USD 1.20 | USD 2.10 | USD 0.45 | USD 0.50 | USD 3.80 |
Key Differentiators
- Integrated protection in a small PG-SOT223-4 package (vs BSP315PH6327XTSA1)
- Logic-level TTL/CMOS input without external driver (vs BSP316PH6327XTSA1)
- Open-drain diagnostic status feedback (vs BTS500801TEAAUMA1)
Design Notes
At 1.4 A continuous drain current with 200 mOhm RDS(on), the BTS3110NHUMA1 dissipates approximately 0.4 W in the PG-SOT223-4 package. With a 31 C/W theta_JA on a 1 sq inch copper pour (2 oz copper), the junction temperature rises only 12 C above ambient, allowing 100 C ambient operation without thermal shutdown. Reduce drain current to 1 A or smaller copper area if ambient exceeds 85 C or if the device is enclosed in a sealed module. Estimated: based on typical PG-SOT223-4 thermal resistance, not a datasheet specification.
The PG-SOT223-4 drain tab is internally bonded to pin 2 (drain) and must be soldered to a copper pad of at least 50 sq mm for adequate heatsinking. Use thermal vias under the pad to the opposite copper plane for additional heat spreading in multilayer boards. Place the input gate resistor (typically 100 ohm in series) close to pin 1, and keep the status-output trace away from the drain power trace to avoid capacitive coupling that can corrupt the diagnostic signal.
Do not connect inductive loads (relay coils, solenoids, small motors) without verifying the avalanche energy rating. The BTS3110NHUMA1 has a single-pulse avalanche rating that covers most small inductive loads under 200 mH; for larger inductors, add an external free-wheeling diode across the load. Never exceed 42 V on the drain - even brief transients above this level will permanently damage the device. The status pin is open-drain and requires a pull-up resistor to logic supply.
Route the gate input (pin 1) and status output (pin 3) on a separate signal layer from the drain power trace (pin 2). Keep the gate trace short and away from high-current drain traces to prevent dv/dt-induced false triggering. Place a 10 kohm pull-down on the gate input to ensure the switch defaults OFF during MCU reset or power-up sequencing. The status output requires a 10 kohm pull-up to logic supply (3.3 V or 5 V).
Compliance Information
RoHS compliant and AEC-Q100 qualified for automotive 12 V applications per Infineon product page. Reach and conflict-minerals compliance verified through Infineon's product environmental compliance disclosures.
