BSP452HUMA1 - 700mA Smart High-Side Switch SOT-223 | Infineon
MPN: BSP452HUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.62 | $16.20 |
| 100 | $1.28 | $128.00 |
| 500 | $1.05 | $525.00 |
| 1,000 | $0.92 | $920.00 |
| 3,000 | $0.78 | $2,340.00 |
BSP452HUMA1 Overview
A smart high-side switch is a type of power distribution switch that connects a load to the positive supply rail and integrates the power MOSFET with protection and diagnostic circuitry. Smart high-side switches sit within the broader category of power management ICs and load drivers, and are widely used to replace discrete MOSFETs plus fuse arrangements in body electronics and industrial control modules.
Key features include short-circuit protection, overvoltage protection (clamp), overtemperature shutdown with hysteresis, overload protection, input protection (ESD), and inductive-load switching capability with negative output clamp. The part is qualified to AEC-Q100 standards for automotive applications and offers diagnostic feedback through the STATUS pin. The integrated charge pump generates the gate drive for the N-channel FET while keeping the load referenced to ground.
The BSP452HUMA1 belongs to Infineon's Classic PROFET 12V family, which uses a vertical DMOS process to minimize RDS(on) for a given die area. Internal current limiting, thermal shutdown, and an active clamp structure for inductive loads allow reliable switching of solenoids, lamps, relays, and motors in 12 V vehicle electrical systems.
Typical applications include automotive body modules (lighting, door modules, seat control), industrial PLC digital I/O, smart relay replacement, and any 12 V/24 V load-switching circuit where fault protection, low quiescent current, and small PCB area are required.
When designing with this part, always observe the maximum 34 V supply rating, derate output current versus ambient temperature, and place the tab solder pad on sufficient copper area to meet the SOT-223 thermal resistance of approximately 65 K/W for reliable thermal performance.
This page synthesizes distributor pricing, drop-in alternatives within the PROFET family, and practical design notes not consolidated in any single datasheet.
Drop-in alternatives for BSP452HUMA1 — 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 BSP452HUMA1 (same form factor and footprint) — differing in Package, Product Type.
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BSP452HUMA1 Maximum Ratings & Electrical Characteristics
| Product Type | Smart High-Side Power Switch |
| Family | Classic PROFET 12V |
| Number of Channels | 1 |
| Switch Type | N-Channel (integrated vertical power FET) |
| Operating Supply Voltage | 5 V to 34 V |
| Continuous Load Current | 700 mA |
| On-State Resistance (RDS(on)) | 0.16 ohm (typical) |
| Package | PG-SOT223-4 (3+Tab) |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q100 qualified |
| Short-Circuit Protection | Yes (integrated) |
| Overvoltage Protection | Yes (clamp) |
| Overtemperature Protection | Yes (shutdown with hysteresis) |
| Overload Protection | Yes |
| ESD Protection | Yes (input pin) |
| Inductive Load Switching | Yes (with negative output clamp) |
| Operating Temperature | -40 C to +150 C (junction) |
| MSL Level | 1 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
BSP452HUMA1 Pin Configuration
| Pin 1 | IN — Supply voltage input (5 V to 34 V) |
| Pin 2 | GND — Ground reference |
| Pin 3 | NC — Not connected (per datasheet) |
| Pin 4 | OUT — Switched output to load |
| Pin Tab | STATUS — Diagnostic feedback / thermal pad |
Typical Applications
BSP452HUMA1 is suitable for 7 applications: Automotive Lighting Modules, Automotive Door Module Actuators, Industrial 24V PLC Digital Outputs, Smart Relay Replacement, Solenoid and Valve Drivers, Battery-Powered IoT Load Switch, HVAC Blower and Fan Speed Control.
Automotive Lighting Modules
The BSP452HUMA1 is ideally suited for driving automotive lamps in body electronics modules. With 700 mA continuous current and 0.16 ohm RDS(on), it can switch headlamp level loads via PWM dimming without thermal stress. The integrated short-circuit and overtemperature protections automatically isolate wiring faults that would otherwise blow fuses, and the STATUS pin reports fault conditions back to the body controller. AEC-Q100 qualification supports use in passenger compartment and underhood lighting circuits across the 12 V vehicle electrical system.
Recommended
Automotive Door Module Actuators
Door modules require multiple high-side switches for window lifters, mirror adjusters, and lock actuators. The BSP452HUMA1 fits each individual load channel with its 700 mA rating handling small motors and mirror heaters comfortably. The 5 V to 34 V supply range accommodates cranking and load-dump transients on the vehicle bus, while the integrated inductive clamp handles the back-EMF from DC loads. STAR topology: the integrated STATUS pin simplifies diagnostics by reporting open-load and short-circuit faults without additional wiring.
Recommended
Industrial 24V PLC Digital Outputs
The BSP452HUMA1 serves as a solid-state replacement for relay outputs in industrial PLC modules driving 24 V solenoids, valves, and indicator lamps. Its 700 mA rating covers the majority of industrial load types, while the 34 V maximum supply rating accepts 24 V nominal rails with transients. The integrated protection functions eliminate the need for external fuses on each output channel, reducing BOM cost and PCB area. STAR topology: STATUS feedback enables predictive maintenance by reporting partial-load degradation.
Recommended
Smart Relay Replacement
Replacing electromechanical relays with the BSP452HUMA1 yields silent operation, microsecond switching speed, and far longer lifetime (no moving contacts to wear). The SOT-223 footprint is far smaller than a typical automotive relay package, enabling miniaturized PCB designs. Integrated thermal and short-circuit protection makes the BSP452HUMA1 tolerant of wiring faults that would weld relay contacts. For new designs targeting 700 mA loads, this part offers a relay-equivalent function with solid-state reliability.
Recommended
Solenoid and Valve Drivers
The BSP452HUMA1 efficiently drives small solenoids, pneumatic valves, and hydraulic valves in industrial and automotive systems. The integrated active clamp absorbs inductive kickback from the coil collapse, protecting the switch and allowing direct connection to the load without external freewheel components. With 700 mA continuous current, it can switch most 12 V and 24 V proportional and on/off solenoids. STAR topology: the STATUS pin provides open-load detection for predictive diagnostics.
Recommended
Battery-Powered IoT Load Switch
Although optimized for 12 V automotive systems, the BSP452HUMA1 also functions as a low-quiescent load-disconnect switch in battery-powered IoT nodes with 5 V to 34 V supply rails. By sitting between the battery and the load, it cuts quiescent draw to near zero when the load is disabled, extending shelf life and runtime. The 0.16 ohm RDS(on) minimizes conduction loss during active periods. STAR topology: STATUS pin can wake the host MCU on fault conditions via interrupt.
Recommended
HVAC Blower and Fan Speed Control
The BSP452HUMA1 paired with PWM control from the body controller can regulate HVAC blower speed and small cooling fans. While high-current blower motors require higher-rated PROFETs (BTS series), the BSP452HUMA1 fits smaller fans and auxiliary ventilation blowers. Integrated thermal shutdown protects against stall conditions where the rotor locks and current spikes. STAR topology: STATUS pin allows the ECU to detect stalled fans and trigger diagnostic trouble codes.
Recommended
Recommended Products Summary
Engineering reference data for BSP452HUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BSP452 | BSP452 E6327 | BSP452HUMA2 | BSP318S | BSP450 |
|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Package | PG-SOT223-4 (3+Tab) | PG-SOT223-4 - same | PG-SOT223-4 - same | PG-SOT223-4 - same | PG-SOT223-4 - same | PG-SOT223-4 - same |
| Short-Circuit Protection | Yes | Yes | Yes | Yes | Yes | Yes |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes | Yes | Yes |
| STATUS Pin | Yes (diagnostic) | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Integrated vertical power FET with 0.16 ohm RDS(on) (vs Discrete N-MOSFET + fuse design)
- AEC-Q100 qualified with full diagnostic STATUS pin (vs Industrial-only high-side switches)
- Active inductive-load clamp integrated (vs Discrete MOSFET without clamp)
Design Notes
Estimated: the SOT-223 thermal pad must be soldered to at least 1 cm^2 of copper pour to achieve the datasheet-stated 65 K/W junction-to-ambient thermal resistance. At 700 mA continuous load, the conduction loss is approximately 0.16 ohm x (0.7 A)^2 = 0.078 W, producing a junction rise of about 5 C above the tab temperature. For derating at elevated ambient temperatures, calculate T_junction = T_ambient + (0.078 W + P_dynamic) x RthJA and ensure T_junction stays below 150 C.
Place a 100 nF decoupling capacitor close to the IN pin (pin 1) to filter supply transients and load-dump events. Keep the STATUS trace away from the OUT switching node to avoid coupling noise into the diagnostic feedback. The SOT-223 thermal tab should connect to a copper pour on at least one PCB layer (preferably top layer) with thermal via arrays to inner ground planes for additional heat spreading.
Do not exceed 34 V on the IN pin or the internal overvoltage clamp will activate and dissipate significant energy. Avoid operating below 5 V - the internal charge pump cannot generate sufficient gate drive and the FET will operate in the linear region, leading to high dissipation. The STATUS pin is open-drain and requires an external pull-up resistor; leaving it floating will not damage the device but prevents fault diagnostics.
Compliance Information
AEC-Q100 qualified per Infineon product page. RoHS and REACH compliant per distributor listings. Halogen-free status not explicitly stated in retrieved data - marked unknown per data authenticity rule.
