BSP452 - 1.1A 60V Smart High-Side Switch | Infineon PROFET
MPN: BSP452 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.45 | $1.45 |
| 10 | $1.28 | $12.80 |
| 100 | $1.05 | $105.00 |
| 500 | $0.92 | $460.00 |
| 1,000 | $0.85 | $850.00 |
| 2,500 | $0.78 | $1,950.00 |
BSP452 Overview
A high-side switch (also called a smart power switch or PROFET) is a semiconductor relay that sits between the battery/load supply and the load, controlling current flow with a logic-level signal. Compared with discrete MOSFET designs, an integrated high-side switch folds the gate drive, charge pump, protection, and ESD structures into one die, eliminating external components such as gate resistors, flyback diodes, and TVS clamps. In the broader taxonomy, the BSP205 belongs to: high-side switch -> load driver -> power distribution switch -> power management IC -> semiconductor. This category is widely adopted in 12 V automotive body electronics, industrial 24 V systems, and any application where a microcontroller must drive a resistive or inductive load.
Key electrical ratings are 1.1 A nominal / 0.7 A DC continuous load current (per DigiKey listing), a 60 V supply rating with integrated clamping, typical on-resistance in the 200-500 mOhm range, and a logic-input CMOS threshold around 1.5 V. The integrated charge pump generates the gate voltage required to fully enhance the N-channel output FET from a 12 V or 24 V supply. A status feedback output reports fault conditions back to the host MCU, enabling robust diagnostic coverage in safety-critical body modules.
Typical applications include automotive body control modules, lighting drivers (interior/exterior lamps, LED strings), relay and solenoid replacement, HVAC actuators, and any 12 V/24 V resistive or inductive load that requires on-die/off protection. According to the Infineon product page, BSP452 is part of the Classic PROFET 12V family aimed at cost-sensitive automotive modules where functional safety and long-term reliability are required.
When designing with BSP452, ensure the input pin sees a CMOS-level signal and that adequate copper area is provided on the drain tab to dissipate I^2R losses. The integrated protections reduce the need for external fuses, TVS diodes, and freewheeling components in most applications.
This page synthesizes distributor pricing, drop-in alternatives, application guidance, and design notes beyond what is found in the standalone manufacturer datasheet for engineers selecting a Classic PROFET 12V high-side switch.
Drop-in alternatives for BSP452 — 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 BSP452 (same form factor and footprint) — differing in Package, Product Type, Family, Overvoltage Protection.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
BSP452HUMA1
✅ Drop-In✓ In Stock
$0.78 / Unit
View Datasheet →BSP452EUMA1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
BSP450
✅ Drop-In📋 Reference alternative (not in catalog)
BSP742RIXUMA1
✅ Drop-In✓ In Stock
$0.96 / Unit
View Datasheet →BSP7721
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
BSP452 Maximum Ratings & Electrical Characteristics
| Product Type | Smart High-Side Power Switch (Classic PROFET 12V) |
| Technology | N-channel vertical power FET with charge pump (Smart SIPMOS) |
| Number of Channels | 1 |
| Input Compatibility | CMOS compatible logic-level input, ground referenced |
| Nominal Load Current | 1.1 A |
| DC Continuous Load Current (DigiKey listing) | 700 mA |
| Supply Voltage (Vbb) | 60 V max (avalanche rated) |
| Package | PG-SOT223-4 (4-pin SOT-223 with tab) |
| Mounting Type | Surface Mount |
| Diagnostic Feedback | Yes (status output) |
| Protection Features | Over-temperature, over-voltage (clamping), ESD, current limit, reverse battery |
| ESD Rating (HBM, per datasheet) | Tested per MIL-STD-883D Method 3015.7 |
| Load Dump Protection | Per ISO 7637-1 and DIN 40839 |
| Lead-Free / RoHS | Yes (Infineon standard) |
BSP452 Pin Configuration
| Pin 1 | IN — Logic input (CMOS level, ground referenced) |
| Pin 2 | GND — Ground reference |
| Pin 3 | Vbb — Supply / battery voltage (drain of internal charge-pump rail) |
| Pin 4 / Tab | OUT (Drain) — Switched output to load; exposed tab is the drain node for thermal dissipation |
Indicative High-Side Switch SOA (Rds(on) limited)
Typical Applications
BSP452 is suitable for 6 applications: Automotive Body Control Modules, Automotive Lamp and LED Drivers, Relay and Coil Replacement, Industrial 24V Load Switching, HVAC Actuator Drivers, Power Distribution and Fuse Replacement.
Automotive Body Control Modules
The BSP452 is purpose-built for 12 V automotive body control modules (BCMs) that drive resistive and small inductive loads from logic-level MCU outputs. Its 1.1 A nominal current and 60 V avalanche rating cover lamp, relay, and motor-driver channels on a BCM PCB, while the ground-referenced CMOS input interfaces directly to microcontrollers without level shifting. Integrated over-temperature, over-voltage, ESD, and reverse-battery protection reduce the need for external TVS clamps, fuses, and freewheeling diodes, which simplifies PCB layout and lowers BOM cost. The PG-SOT223-4 footprint offers adequate copper-tab cooling for 0.7 A continuous loads typical of BCM channels. According to the Infineon product page, BSP452 is part of the Classic PROFET 12V family targeted at automotive modules where functional robustness and supply-chain maturity are required.
Recommended
Automotive Lamp and LED Drivers
The BSP452 drives 12 V incandescent lamps, halogen bulbs, and LED strings in interior and exterior lighting modules with reliable cold-crest inrush handling. The internal charge pump fully enhances the N-channel output FET from a 12 V supply, providing low Rds(on) and therefore low steady-state dissipation in lamp filaments. Over-temperature shutdown protects the part during the inrush surge when a cold filament draws many times its steady-state current. The 60 V clamping absorbs load-dump transients per ISO 7637-1, which is mandatory for under-hood and chassis-mounted lamp drivers. The CMOS input allows direct PWM dimming from a body-control MCU, supporting brightness control for instrument-panel backlights and tail-lamp assemblies.
Recommended
Relay and Coil Replacement
The BSP452 is frequently used as a solid-state replacement for automotive relays and small solenoid coils, eliminating mechanical wear, contact arcing, and audible click noise. Its avalanche-rated output stage clamps the inductive kick when the coil is de-energized, removing the need for an external freewheeling diode in most 12 V/24 V coil applications. Logic-level CMOS input enables direct drive without predriver stages, while the integrated over-temperature and current-limit protections guard against stalled-rotor conditions in solenoid valves. Compared with a 12 V automotive relay, the BSP452 offers faster switching, lower quiescent draw, and full electronic diagnostics via the status pin. Designers should still respect the datasheet's repetitive avalanche energy rating for highly inductive loads.
Recommended
Industrial 24V Load Switching
Outside automotive, the BSP452 serves 24 V industrial PLC and sensor modules that switch resistive loads, indicator lamps, and small actuators from a logic-level controller. Its 60 V supply rating provides ample headroom above the nominal 24 V rail to absorb switching transients on long cable harnesses. The ground-referenced CMOS input allows direct connection to 3.3 V or 5 V microcontrollers without optocouplers or predrivers, simplifying digital isolation strategies. Integrated ESD protection per MIL-STD-883D improves robustness during handling and field installation. The PG-SOT223-4 package supports reflow soldering and is widely accepted by EMS providers for industrial volume production.
Recommended
HVAC Actuator Drivers
The BSP452 drives small DC motors, blower-speed resistors, and damper actuators inside automotive HVAC modules where space, weight, and reliability are all critical. Its small PG-SOT223-4 footprint allows dense PCB placement near the actuators, while integrated diagnostics enable the HVAC controller to detect open-load and short-to-battery faults. The 1.1 A continuous capability handles typical HVAC flap motors and resistor-array taps, and the 60 V rating survives jump-start and load-dump events on the vehicle's 12 V bus. Compared with discrete N-MOSFET designs, the BSP452 reduces PCB area by folding gate drive, charge pump, and protection onto a single die.
Recommended
Power Distribution and Fuse Replacement
The BSP452 acts as an electronic fuse / resettable smart switch in distributed 12 V power architectures, replacing blade fuses and mechanical circuit breakers on per-load feeds. Its current-limit and over-temperature protections trip the output under fault conditions and automatically recover when the fault clears, eliminating fuse replacement in the field. The status feedback pin allows the central body controller to log which channel faulted, supporting diagnostics over CAN or LIN. Compared with PPTC resettable fuses, the BSP452 reacts faster, runs cooler in steady state, and provides a logic-level control interface. Designers should size the copper pours on the PG-SOT223-4 tab to maintain Rds(on)-based self-heating within the SOA.
Recommended
Recommended Products Summary
Engineering reference data for BSP452 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BSP452HUMA1 | BSP452EUMA1 | BSP450 | BSP742 | BSP7721 |
|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Package | PG-SOT223-4 | PG-SOT223-4 | PG-SOT223-4 | PG-SOT223-4 | PG-SOT223-4 | PG-SOT223-4 |
| Nominal Load Current | 1.1 A | 1.1 A | 1.1 A | ~0.7 A | ~1.5 A | ~0.6 A |
| Diagnostic Feedback | Status output | Status output | Status output | Status output | Richer diagnostic feedback | Yes |
| Reverse Battery Protection | Yes | Yes | Yes | Yes | Yes | Yes |
| Logic Input Type | CMOS, ground referenced | CMOS, ground referenced | CMOS, ground referenced | CMOS, ground referenced | CMOS, ground referenced | CMOS, ground referenced |
| Automotive Grade (AEC-Q100) | Yes (PROFET 12V family) | Yes (HUMA1 suffix) | Yes (EUMA1 suffix) | Yes (PROFET 12V family) | Yes | Yes |
Key Differentiators
- 1.1 A nominal current in PG-SOT223-4 with 60 V avalanche rating (vs BSP450)
- Integrated diagnostic feedback with Classic PROFET simplicity (vs BSP742)
- Smart SIPMOS monolithic integration vs discrete N-MOSFET designs (vs Discrete N-MOSFET high-side switch)
Design Notes
Estimated: at 1.1 A load and 200 mOhm Rds(on), the BSP452 dissipates approximately P = I^2R = (1.1)^2 * 0.2 = 0.242 W steady-state in the PG-SOT223-4. With a typical theta_JA around 60 C/W on a 1 sq. inch copper pour, the junction rise is ~14.5 C above ambient, well inside the SOA. For sustained loads above 1 A or operation at 85 C ambient, expand the drain-tab copper pour to at least 2 sq. inches or use the higher-current BSP742 sibling.
Solder the exposed drain tab to a copper pad of at least 1 sq. inch to keep Rds(on) self-heating within the SOA. Keep the input trace short and route it away from switching nodes to avoid false triggering from dV/dt coupling into the CMOS input. Place the Vbb decoupling capacitor (>=100 nF ceramic, plus a bulk electrolytic per load) close to the Vbb pin to handle the inrush of cold lamp filaments and stabilize the internal charge pump.
Do not exceed the 60 V supply rating or apply reverse polarity without external protection, although the device has built-in reverse-battery robustness up to its datasheet limit. Do not rely on the status pin as a load-current monitor; it reports fault state, not proportional current. For repetitive avalanche with inductive loads, calculate E = 0.5 * L * I^2 and compare to the datasheet's single-pulse avalanche rating; add an external TVS if exceeded.
Compliance Information
PROFET 12V family parts are automotive-qualified; HUMA1 ordering codes are AEC-Q100 qualified per Infineon product page. ESD tested per MIL-STD-883D Method 3015.7; load-dump tested per ISO 7637-1 and DIN 40839.
