ISP452HUMA1 - 700mA Smart High-Side Switch SOT-223-4 | Infineon
MPN: ISP452HUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.45 | $1.45 |
| 10 | $1.32 | $13.20 |
| 100 | $1.18 | $118.00 |
| 500 | $1.05 | $525.00 |
| 1,000 | $0.92 | $920.00 |
ISP452HUMA1 Overview
A high-side switch is a power-distribution topology in which the MOSFET is placed between the supply rail and the load, allowing the load to be tied to ground. Compared to low-side switching, high-side configurations eliminate ground loops and protect downstream circuitry from inrush events. The ISP452HUMA1 fits within the broader hierarchy: high-side switch → load driver → power distribution switch → PMIC → power management IC → semiconductor.
Key specifications include 700 mA continuous load current, 5 V to 52 V operating supply range, low quiescent current in standby mode, integrated short-circuit, over-temperature, and over-voltage protection, plus an open-drain diagnostic status output. The CMOS-compatible input directly interfaces with 3.3 V and 5 V microcontrollers without level shifting, while the internal charge pump fully enhances the N-channel FET to minimize R_DS(on) and conduction losses.
Architecturally, the device combines a vertical DMOS output stage, an on-chip charge pump, ESD-protected logic inputs, and protection state-machine logic. The result is a one-chip replacement for electromechanical relays, fuses, and discrete MOSFET drive circuits, reducing PCB area while improving reliability in harsh industrial environments.
Typical applications include industrial automation modules, PLC digital outputs, sensor and actuator power distribution, HVAC controls, and replaceable relay-and-fuse subsystems. The 52 V rating accommodates 24 V and 48 V industrial buses with substantial transient headroom.
A key design consideration is thermal management: at 700 mA continuous, conduction losses scale with R_DS(on), so copper pour area and possible PCB thermal vias are required to keep junction temperature within the −40 °C to +125 °C operating range.
This page synthesizes distributor pricing, same-family Infineon drop-in alternatives, protection-feature comparisons, and PCB thermal guidance not found in the manufacturer datasheet alone.
Drop-in alternatives for ISP452HUMA1 — 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 ISP452HUMA1 (same form factor and footprint) — differing in Diagnostic Output, Continuous Load Current, Number of Channels, Operating Temperature, Output Configuration.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ISP452HUMA2
✅ Drop-In📋 Reference alternative (not in catalog)
ISP452HUMA3
✅ Drop-In📋 Reference alternative (not in catalog)
ISP752TFUMA1
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →ISP452HUMA1
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →BTS51202EKAXUMA1
✅ Drop-In✓ In Stock
$1.68 / Unit
View Datasheet →ISP452HUMA1 Maximum Ratings & Electrical Characteristics
| Product Type | Smart High-Side Power Switch |
| Number of Channels | 1 |
| Switch Configuration | High-side, N-channel |
| Output Configuration | 1:1 |
| Continuous Load Current | 700 mA |
| Operating Supply Voltage (Vbb) | 5 V to 52 V |
| Input Logic Compatibility | CMOS, ground-referenced, µC compatible |
| Built-in Protections | Short-circuit, over-temperature, over-voltage |
| Diagnostic Output | Open-drain status feedback |
| Package | PG-SOT223-4 (SOT-223-4) |
| Mounting Type | Surface Mount |
| Technology | Smart SIPMOS (vertical DMOS + charge pump + logic) |
| RoHS Status | Compliant |
| Load Types Supported | Resistive, inductive, capacitive |
ISP452HUMA1 Pin Configuration
| Pin 1 | Vbb — Supply voltage (5 V to 52 V), battery/load supply input |
| Pin 2 | IN — CMOS-compatible logic input, ground-referenced; drives gate of internal N-FET |
| Pin 3 | GND — Ground reference for logic input and protection circuitry |
| Pin 4 | OUT — Switched output to load; high-side drain of internal N-channel FET |
Typical Applications
ISP452HUMA1 is suitable for 6 applications: Industrial PLC Digital Output Module, 24V Sensor and Actuator Power Distribution, HVAC Control Module, Replacement for Electromechanical Relays, Industrial Sensor Power Switch (24V Bus), Building Automation Lighting and Shutter Control.
Industrial PLC Digital Output Module
The ISP452HUMA1 is well suited to industrial PLC digital output modules that switch 24 V grounded loads such as solenoids, indicators, and small relays. Its 5 V to 52 V supply range directly covers the 24 V industrial bus with substantial transient headroom, and the 700 mA continuous rating handles typical 24 V actuator currents. Integrated short-circuit, over-temperature, and over-voltage protection eliminate external fuses and allow direct field wiring. The CMOS-compatible logic input interfaces with the PLC's 3.3 V or 5 V GPIO without level shifting, while the open-drain diagnostic pin reports fault states back to the controller for predictive maintenance in factory automation.
Recommended
24V Sensor and Actuator Power Distribution
The ISP452HUMA1 provides per-channel protected 24 V power to field sensors and actuators in distributed industrial nodes. Its 700 mA continuous current is sufficient for valve clusters, proximity sensors, and small DC loads, while the integrated charge pump fully enhances the internal N-channel FET, minimizing R_DS(on) and conduction losses. The ground-referenced CMOS input is immune to common-mode ground shifts across long field wiring, and the device's wide Vbb range tolerates load-dump transients common in 24 V industrial environments. Built-in protection prevents damage from field wiring shorts, broken cabling, or stuck actuators, reducing service calls.
Recommended
HVAC Control Module
In HVAC control modules, the ISP452HUMA1 drives damper actuators, fan relays, and indicator lamps from a 24 V AC-rectified or 48 V system bus. The 5 V to 52 V operating range covers common HVAC supply rails, and 700 mA continuous current handles small motor windings and solenoid valves. Built-in thermal shutdown protects the device when fan motors stall, and over-voltage protection absorbs inductive flyback. Replacing electromechanical relays with the ISP452HUMA1 reduces audible click noise, eliminates mechanical wear, and enables PWM-based proportional control for variable-speed fans and modulated dampers, improving HVAC efficiency.
Recommended
Replacement for Electromechanical Relays
The ISP452HUMA1 directly replaces electromechanical relays and discrete MOSFET + fuse circuits in industrial control panels. According to the Infineon datasheet, it supports resistive, inductive, and capacitive loads and reduces BOM count by integrating the power FET, charge pump, gate driver, and protection in one SOT-223-4 package. Solid-state switching eliminates relay coil current draw, contact bounce, arcing, and mechanical wear, extending product life in vibration-prone environments. The diagnostic output provides fault feedback unavailable with simple fuses, enabling remote diagnostics and faster field service.
Recommended
Industrial Sensor Power Switch (24V Bus)
The ISP452HUMA1 functions as a protected switch in industrial sensor power distribution networks, where each sensor or sub-system is individually switched and monitored. The 700 mA current rating covers multi-sensor branches and small instrumentation loads, while the 5 V to 52 V Vbb range tolerates 24 V and 48 V industrial buses. Per-channel over-current and thermal protection prevent a single shorted sensor from bringing down an entire node, improving system reliability. The open-drain diagnostic pin lets the host µC detect faulted channels and isolate them via firmware, supporting hot-swappable sensor modules.
Recommended
Building Automation Lighting and Shutter Control
In building automation, the ISP452HUMA1 drives low-voltage lighting circuits, blinds/shutters, and small motors from 24 V building-bus supplies. The 700 mA continuous rating handles LED driver inputs and small DC motor windings, and the integrated protection prevents damage from stalled shutters or shorted LED strings. The CMOS-compatible input interfaces with building-automation controllers using 3.3 V GPIO, while the open-drain diagnostic output reports fault conditions for centralized monitoring. Replacing discrete switching with the ISP452HUMA1 reduces panel size, simplifies wiring, and enables silent operation compared to relay-based shutter controls.
Recommended
Recommended Products Summary
Engineering reference data for ISP452HUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISP452HUMA2 | ISP452HUMA3 | ISP752TFUMA1 | BTS51202EKAXUMA1 |
|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon |
| Package | PG-SOT223-4 | PG-SOT223-4 - same | PG-SOT223-4 - same | PG-SOT223-4 family - same | PG-SOT223-4 family - same |
| Continuous Load Current | 700 mA | Comparable 700 mA class | Comparable 700 mA class | Comparable 700 mA class | Comparable class, may differ |
| Operating Supply (Vbb) | 5 V to 52 V | 5 V to 52 V | 5 V to 52 V | Comparable range | Comparable PROFET range |
| Logic Input | CMOS-compatible, ground-referenced | CMOS-compatible | CMOS-compatible | CMOS-compatible | CMOS-compatible |
| Number of Channels | 1 | 1 | 1 | 1 | 1 |
| Integrated Protection | Short-circuit, over-temperature, over-voltage | Same family protection set | Same family protection set | PROFET protection set | PROFET protection set |
| Diagnostic Output | Open-drain status feedback | Open-drain status | Open-drain status | Status output | Status output |
Key Differentiators
- Wide 52 V supply range with integrated charge pump (vs Discrete N-MOSFET + external gate driver)
- Full protection suite in SOT-223-4 (vs Discrete MOSFET + PTC fuse + thermal cutout)
- Diagnostic feedback pin (vs Simple high-side load switch without diagnostics)
Design Notes
Estimated: at 700 mA continuous load with R_DS(on) of approximately 200 mΩ, conduction losses reach roughly 0.1 W per channel. For ambient temperatures near 85 °C in sealed industrial enclosures, the SOT-223-4 tab must be soldered to a copper pour of at least 1 square centimeter (per JEDEC JESD51 guidelines for SOT-223) with thermal vias to inner layers to keep the junction below 125 °C. For continuous operation at 500 mA or higher, add multiple thermal vias under the tab.
Place a 100 nF ceramic decoupling capacitor directly at the Vbb pin to GND, and a bulk aluminum or tantalum capacitor rated for the full 52 V Vbb transient range on the supply rail within 1 cm of the device. According to the Infineon ISP452 datasheet, low-ESR ceramic bypass at Vbb improves immunity to fast load-dump transients common in 24 V industrial wiring. Keep input trace short and route away from the OUT trace to minimize injected noise on the CMOS input.
Do not operate ISP452HUMA1 below 5 V Vbb — the internal charge pump cannot fully enhance the N-channel FET, causing high R_DS(on) and excessive heat. Avoid back-feeding the OUT pin above Vbb during inductive flyback; rely on the integrated over-voltage clamp. Finally, the diagnostic pin is open-drain and requires an external pull-up resistor (typically 10 kΩ to Vcc of the host µC); leaving it floating will prevent fault monitoring and may hide protection events.
Compliance Information
RoHS compliant per Infineon product page. Industrial-grade part, not AEC-Q100 qualified (no automotive Q suffix). For automotive PROFET equivalents, see Infineon BTS-series.
