ISP742RIFUMA1 - 400mA Smart High-Side Switch | Infineon
MPN: ISP742RIFUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.45 | $24.50 |
| 100 | $1.98 | $198.00 |
| 500 | $1.62 | $810.00 |
| 1,000 | $1.35 | $1,350.00 |
ISP742RIFUMA1 Overview
A high-side switch is a semiconductor device that controls power delivery from a positive supply rail to a load by switching on the positive (high) side rather than the low side. High-side switches sit within the broader power distribution switch hierarchy: PMIC > load driver > high-side switch > smart switch. This topology offers the advantage of keeping the load ground reference stable, which simplifies wiring in industrial systems where multiple loads share a common return path.
Key features of the ISP742RIFUMA1 include a logic-level input compatible with 3.3V and 5V microcontrollers, built-in overcurrent and overtemperature protection, reverse battery robustness, and ESD protection. The device integrates a charge pump to drive the N-channel MOSFET fully on, achieving low Rds(on) and minimal power dissipation. Diagnostic feedback through a status output enables fault monitoring by the host controller.
Typical applications include PLC digital output modules, industrial sensor power rails, actuator drivers, and process control systems. The device is qualified for the harsh electrical environments typical of industrial 24V systems, including load dump and jump-start transients on 12V/24V automotive-style buses.
When designing with this device, ensure the status pin pull-up is connected to a logic-level supply independent of the load supply to maintain fault visibility during overload events.
Drop-in alternatives for ISP742RIFUMA1 — 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 ISP742RIFUMA1 (same form factor and footprint) — differing in Package, Continuous Load Current, Diagnostic Output, Number of Channels, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ISP752TFUMA1
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →BTS51202EKAXUMA1
✅ Drop-In✓ In Stock
$1.68 / Unit
View Datasheet →BTS70402EPGXUMA1
✅ Drop-In✓ In Stock
$3.18 / Unit
View Datasheet →ISP742RIFUMA1 Maximum Ratings & Electrical Characteristics
| Switch Type | High-Side Power Switch (1:1 N-Channel) |
| Number of Outputs | 1 |
| Continuous Load Current | 400 mA |
| Input Voltage Range | 5 V to 34 V |
| Operating Temperature Range | -40 C to +85 C |
| Package | PG-DSO-8-24 |
| Mounting Type | Surface Mount |
| Number of Pins | 8 |
| Logic Input Compatibility | 3.3 V / 5 V CMOS/TTL |
| Protection Features | Overcurrent, Overtemperature, Reverse Battery, ESD |
| Status Output | Yes (diagnostic feedback) |
| Charge Pump | Integrated |
| RoHS Status | Compliant |
ISP742RIFUMA1 Pin Configuration
| Pin 1 | OUT — Switched output to load |
| Pin 2 | VCC — Logic supply voltage |
| Pin 3 | IN — Logic-level control input |
| Pin 4 | GND — Ground reference |
| Pin 5 | STATUS — Diagnostic fault feedback output |
| Pin 6 | NC — Not connected |
| Pin 7 | VS — Power supply input (load voltage) |
| Pin 8 | NC — Not connected |
Typical Applications
ISP742RIFUMA1 is suitable for 6 applications: PLC Digital Output Module, Industrial Sensor Power Distribution, Process Control Actuator Driver, Building Automation HVAC Control, Industrial Relay Replacement, 24V Industrial Bus Power Switching.
PLC Digital Output Module
The ISP742RIFUMA1 is ideally suited for PLC digital output modules driving 24V industrial loads up to 400 mA. Its 5-34V input range covers standard 24V PLC rails with margin for transients, and the integrated overcurrent and overtemperature protection eliminates the need for external fuses on each channel. The status output provides per-channel fault feedback to the PLC backplane for diagnostic reporting. With logic-level input compatibility (3.3V/5V), it interfaces directly to PLC SoCs without level shifters. The PG-DSO-8-24 package enables high channel density on PLC carrier boards. Compared to discrete MOSFET designs, the ISP742RIFUMA1 reduces BOM count by 40-60% and PCB area by 30%, critical for compact modular PLC form factors.
Recommended
Industrial Sensor Power Distribution
For industrial 24V sensor power rails, the ISP742RIFUMA1 provides protected, switchable power to field sensors including proximity switches, photoelectric sensors, and limit switches. Its reverse-battery protection prevents damage during wiring errors common in field installations, while the integrated ESD protection (typically >2 kV HBM) withstands electrostatic discharge from cable handling. The 400 mA rating supports multi-sensor loads through a single channel. The charge pump ensures full MOSFET enhancement even at low supply voltages (5V), maintaining low Rds(on) and minimal voltage drop to the sensor. Diagnostic feedback via the status pin enables predictive maintenance by reporting open-circuit or short-circuit conditions to the host controller.
Recommended
Process Control Actuator Driver
In process control systems, the ISP742RIFUMA1 drives solenoid valves, relays, and small actuators requiring protected 24V switching at moderate currents. The integrated protection features handle the back-EMF from inductive loads, while the status output confirms successful switching for closed-loop control verification. The device's wide operating temperature range (-40C to +85C) suits harsh industrial environments including outdoor cabinets and factory floors. With a logic-level input, it interfaces directly to microcontroller GPIO pins without additional driver stages. The PG-DSO-8-24 surface-mount package supports automated assembly for high-volume process control equipment manufacturing.
Recommended
Building Automation HVAC Control
Building automation HVAC systems benefit from the ISP742RIFUMA1's robust 24V switching capability for damper actuators, valve controls, and fan relays. The device's low quiescent current supports energy-efficient building management systems that must meet stringent standby power requirements. Reverse-battery protection is valuable during installation and maintenance when wiring polarity errors are common. The compact PG-DSO-8-24 package enables miniaturized HVAC controller designs. Diagnostic feedback allows the building management system to detect failed actuators and report maintenance needs, reducing service calls and improving system uptime in commercial building applications.
Recommended
Industrial Relay Replacement
The ISP742RIFUMA1 serves as a solid-state replacement for electromechanical relays in industrial control panels, offering silent operation, no contact bounce, and immunity to shock and vibration. Its 400 mA rating handles signal-level relay coils and small contactor drivers, while the integrated protection eliminates the need for flyback diodes and snubber circuits required by relay coils. The status output provides positive confirmation of switch state, addressing a common concern when replacing visible mechanical relays. The PG-DSO-8-24 package fits standard relay socket footprints, simplifying retrofit designs where mechanical relays are being upgraded to solid-state switching.
Recommended
24V Industrial Bus Power Switching
For 24V industrial bus power switching applications, the ISP742RIFUMA1 provides protected channel control on PROFIBUS, DeviceNet, and similar industrial communication backbones. The device handles bus node power-up/down sequencing without inrush issues, and its overcurrent protection isolates faults to prevent complete bus failure. The 5-34V input range accommodates bus voltage variations during heavy load transients. The logic-level input allows direct interface to bus controller ASICs and FPGAs. With its PG-DSO-8-24 package, the ISP742RIFUMA1 is suitable for high-density bus node designs where multiple channels must fit on compact PCBs.
Recommended
Recommended Products Summary
Engineering reference data for ISP742RIFUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISP752TFUMA1 | BTS51202EKAXUMA1 | BTS70402EPGXUMA1 |
|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon |
| Package | PG-DSO-8-24 | PG-DSO-8-24 - same | PG-DSO-8-24 - same | PG-DSO-8-24 - same |
| Continuous Load Current | 400 mA | 1.2 A | 2 x 1.5 A | 2 x 2.5 A |
| Input Voltage Range | 5 V to 34 V | 5 V to 34 V | 4.5 V to 28 V | 4.5 V to 28 V |
| Number of Channels | 1 | 1 | 2 | 2 |
| Overcurrent Protection | Yes | Yes | Yes | Yes |
| Status/Diagnostic Output | Yes | Yes | Yes | Yes |
| Reverse Battery Protection | Yes | Yes | Yes | Yes |
| Logic Input Voltage | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V / 5 V |
Key Differentiators
- Lower current rating optimized for cost-sensitive applications (vs ISP752TFUMA1)
- Single-channel design with focused feature set (vs BTS51202EKAXUMA1)
- Wide input voltage range for industrial 24V systems (vs BTS70402EPGXUMA1)
Design Notes
At 400 mA continuous load, the ISP742RIFUMA1 dissipates I² × Rds(on) watts. Estimated: assuming Rds(on) of 1 ohm at 25 C and junction temperature rise of theta_JA × power, ensure PCB copper pour of at least 100 mm² on the thermal pad. For ambient temperatures above 60 C, derate load current by 0.5 mA/C or add external heatsinking. The PG-DSO-8-24 package's exposed pad must be soldered to a copper pour for rated thermal performance.
Place the ISP742RIFUMA1 as close as possible to the load connector to minimize trace inductance and voltage drop. Use wide traces (at least 0.5 mm per ampere) for the VS and OUT pins. The GND pin should connect to a ground plane with multiple vias for low-impedance return. Keep the logic input traces away from the power output traces to prevent noise coupling into the control input.
Do not connect the status pin pull-up resistor to the load-side supply (VS); connect it to a stable logic supply (VCC or microcontroller supply). When VS collapses during a short-circuit event, a VS-referenced pull-up would lose its reference and report false fault states. Additionally, ensure the input pin is never left floating; tie it to GND through a 10 kohm resistor if not driven by the controller.
The exposed thermal pad of the PG-DSO-8-24 package should be soldered directly to a copper pour on the PCB. Use thermal vias (0.3 mm diameter, 0.5 mm pitch) connecting the top copper to inner ground planes for improved heat dissipation. Maintain at least 0.2 mm clearance between the thermal pad and signal traces to comply with manufacturing tolerances.
Compliance Information
RoHS and REACH compliant per Infineon product page. Industrial grade qualification; not AEC-Q100 rated for automotive. Halogen-free per Infineon green product standards.
