ITS4100S-SJ-N - 1A 60V Smart High-Side Switch | Infineon
MPN: ITS4100S-SJ-N ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.35 | $2.35 |
| 10 | $2.1 | $21.00 |
| 100 | $1.78 | $178.00 |
| 500 | $1.55 | $775.00 |
| 1,000 | $1.32 | $1,320.00 |
ITS4100S-SJ-N Overview
A high-side power switch, also called a high-side driver or PROFET (protected FET), is a type of power distribution IC that sits between a positive supply rail and the load. By placing the switch on the high side rather than the low side, the load is grounded during off-state, which improves safety in automotive and industrial systems. The high-side switch category sits within the broader hierarchy of power management ICs, which also includes low-side drivers, half-bridges, and full H-bridges. Compared with discrete MOSFET plus driver designs, an integrated high-side switch significantly reduces PCB area, BOM count, and design complexity while delivering factory-tuned protection.
Key features of the ITS4100S-SJ-N include a typical on-resistance of 70 mOhm, integrated overload protection with current limitation, short-circuit protection, thermal shutdown with auto-restart, overvoltage protection including load-dump resilience, and fast demagnetization of inductive loads. The logic input is CMOS-compatible and referenced to ground, simplifying connection to 3.3 V or 5 V microcontrollers. Reverse-battery protection is provided externally with a simple network. A small 1 nF ceramic output capacitor is sufficient for stable operation, and only a few external components are needed to implement a complete protected high-side drive.
Typical applications for the ITS4100S-SJ-N include industrial sensor power distribution, PLC digital outputs, relay and solenoid replacement, lighting drivers, and small motor drivers. Its 60 V load-dump tolerance and robust protection make it especially attractive for 24 V industrial automation systems where reliability and immunity to transients are critical. In safety-oriented designs, the integrated diagnostics and protection features reduce the need for external fuses or supervisory circuits.
When designing with this part, ensure proper thermal management under sustained high-current loads by providing adequate copper area on the PCB. The PG-DSO-8 thermal pad should be soldered to a sufficient copper pour to keep junction temperature within safe limits. Pay attention to the input pin logic thresholds - a logic low of less than 1.5 V guarantees turn-off, while a logic high above 3.5 V guarantees turn-on for typical 5 V CMOS logic levels.
This page synthesizes Infineon distributor pricing, pin-compatible drop-in alternatives from the PROFET family and competitors, and practical design notes not found in the manufacturer datasheet. Source data is cross-referenced against Infineon's official product page and authorized distributors as of 2026-10-08.
Drop-in alternatives for ITS4100S-SJ-N — 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 ITS4100S-SJ-N (same form factor and footprint) — differing in Package, Continuous Load Current, Product Type, Number of Channels, Topology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ITS4100SSJNXUMA1
✅ Drop-In✓ In Stock
$0.89 / Unit
View Datasheet →ITS4200S-SJ-N
✅ Drop-In📋 Reference alternative (not in catalog)
BTS4140NHUMA1
✅ Drop-In✓ In Stock
$0.58 / Unit
View Datasheet →BTS4141NHUMA1
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →ITS4100E-SJ-N
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS1H100BPHPRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
ITS4100S-SJ-N Maximum Ratings & Electrical Characteristics
| Product Type | Smart High-Side Power Switch |
| Series | PROFET (MINI-PROFET family) |
| Supply Voltage Range | 5 V to 34 V (operating) |
| Maximum Supply Voltage | 60 V (load-dump tolerant) |
| Continuous Load Current | 1 A |
| On-Resistance (typ) | 70 mOhm |
| Number of Channels | 1 |
| Switch Type | N-Channel High-Side |
| Input Logic Compatibility | CMOS-compatible, active-high |
| Built-in Protection | Overload, short-circuit, thermal shutdown, overvoltage |
| Thermal Shutdown Behavior | Auto-restart |
| Load Dump Protection | Yes (integrated) |
| Reverse Battery Protection | External network required |
| Output Capacitor Requirement | 1 nF ceramic minimum |
| Operating Temperature | -40C to +125C |
| Package | PG-DSO-8 (DSO-8) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
ITS4100S-SJ-N Pin Configuration
| Pin 1 | OUT — Power output to load |
| Pin 2 | IN — Logic input, CMOS-compatible, active-high |
| Pin 3 | GND — Ground reference |
| Pin 4 | VBB — Supply voltage (5V to 34V, 60V transient) |
| Pin 5 | NC — Not connected (per datasheet) |
| Pin 6 | NC — Not connected (per datasheet) |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | NC — Not connected (per datasheet) |
Typical Applications
ITS4100S-SJ-N is suitable for 6 applications: Industrial 24V Sensor Power Distribution, PLC Digital Output Module, Relay and Solenoid Replacement, LED Lighting Driver, Small DC Motor Driver (Brushed), Automotive Body Electronics.
Industrial 24V Sensor Power Distribution
The ITS4100S-SJ-N is purpose-built for industrial 24 V sensor power distribution in PLCs and field I/O modules. With 5 V to 34 V operating range, 60 V load-dump tolerance, and integrated short-circuit protection with diagnostic feedback, it provides robust IEC 61131-2 compliant switching for proximity sensors, photoelectric sensors, and limit switches. The 70 mOhm RDS(on) keeps conduction loss under 70 mW at 1 A, while the CMOS-compatible active-high input interfaces directly to 3.3 V or 5 V microcontroller GPIO without level shifters. The 1 nF minimum output capacitance simplifies BOM, and the exposed thermal pad enables sustained 1 A operation with a modest copper pour. Compared to discrete MOSFET-plus-fuse designs, this PROFET cuts PCB area by roughly 60% and eliminates the need for external overcurrent protection.
Recommended
PLC Digital Output Module
In PLC digital output modules, the ITS4100S-SJ-N drives 24 V DC loads such as solenoid valves, indicator lamps, and small relays. Its 1 A continuous current covers most industrial discrete outputs, while the integrated thermal shutdown with auto-restart prevents latch-up faults in field wiring. The fast demagnetization of inductive loads protects the device when switching solenoids off, eliminating the need for external freewheeling diodes in many cases. The overvoltage clamp handles inductive kickback up to 60 V, ensuring reliability on long cable runs where back-EMF can be severe. Compared with electromechanical relays, this PROFET provides silent operation, longer lifetime (>10 million cycles vs ~100k for relays), and built-in diagnostics that report open-load and short-circuit conditions back to the PLC CPU.
Recommended
Relay and Solenoid Replacement
The ITS4100S-SJ-N serves as a solid-state replacement for electromechanical relays and solenoids in industrial control panels and battery management systems. With 70 mOhm RDS(on) and 1 A continuous rating, it matches the contact rating of typical miniature relays while delivering silent, bounce-free switching. The CMOS-compatible input draws negligible current, allowing direct drive from MCU pins without driver transistors. The integrated reverse-battery protection (via external network) makes it suitable for automotive 12 V/24 V systems where polarity reversal can occur during jump-start events. The ITS4100S-SJ-N's 60 V load-dump tolerance exceeds automotive ISO 7637-2 requirements, while its -40C to +125C operating range handles underhood and industrial cabinet environments.
Recommended
LED Lighting Driver
For industrial and architectural LED lighting, the ITS4100S-SJ-N provides a compact, protected high-side switch for LED strings operating from 12 V or 24 V DC supplies. Its 1 A continuous rating supports LED strings up to approximately 24 W (24 V at 1 A), while the 70 mOhm RDS(on) keeps efficiency above 95%. The PWM-capable CMOS input accepts dimming signals from MCUs at frequencies up to the kHz range, enabling smooth brightness control. The integrated thermal shutdown protects against LED short-circuit faults that could otherwise damage the driver, and the overvoltage clamp handles inductive transients from long LED cable runs. Compared with discrete MOSFET drivers, this PROFET reduces design complexity and provides factory-tuned protection that simplifies IEC 61347-1 compliance for luminaire safety.
Recommended
Small DC Motor Driver (Brushed)
The ITS4100S-SJ-N drives small brushed DC motors up to 1 A in HVAC dampers, valve actuators, and small pump controls. Paired with a complementary low-side switch, it forms a half-bridge for bidirectional motor control. The fast demagnetization feature handles motor back-EMF efficiently, while the current limit protects against stall conditions that would otherwise destroy the motor windings. The 60 V load-dump tolerance is essential for automotive HVAC applications where voltage transients can be severe. The PROFET's thermal shutdown with auto-restart allows recovery from temporary overloads without service intervention, ideal for unattended actuator applications.
Recommended
Automotive Body Electronics
In automotive body electronics modules, the ITS4100S-SJ-N switches resistive and inductive loads such as seat heaters, mirror adjusters, and auxiliary lamps. Its 60 V load-dump tolerance and -40C to +125C operating range handle the harsh automotive underhood and cabin environments, while the integrated protection functions reduce the need for external fuses and TVS diodes. The CMOS-compatible input interfaces directly to automotive microcontrollers with 3.3 V or 5 V logic. Note: ITS4100S-SJ-N is NOT AEC-Q100 qualified per Infineon; for AEC-Q100 requirements, choose the ITS4100S-SJ-N-Q1 variant or TI's TPS1H100BPHPRQ1. The PROFET's diagnostic feedback (open-load, short-to-ground, short-to-VBB) supports ISO 26262 functional safety requirements at the system level.
Recommended
Recommended Products Summary
Engineering reference data for ITS4100S-SJ-N — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ITS4100SSJNXUMA1 | ITS4200S-SJ-N | BTS4140N | BTS4141N | TPS1H100BPHPRQ1 |
|---|---|---|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Texas Instruments |
| Package | PG-DSO-8 (DSO-8) | PG-DSO-8 (DSO-8) - same | PG-DSO-8 (DSO-8) - same | PG-DSO-8 (DSO-8) - same | PG-DSO-8 (DSO-8) - same | HTSSOP-8 (PWP) - footprint compatible |
| Continuous Load Current | 1 A | 1 A (same) | 2 A | 1 A (same) | 1 A (same) | 1 A (same) |
| On-Resistance (typ) | 70 mOhm | 70 mOhm (same) | 40 mOhm (lower) | 100 mOhm | 100 mOhm | 100 mOhm |
| Maximum Supply Voltage | 60 V (load dump) | 60 V (same) | 60 V (same) | 60 V (same) | 60 V (same) | 40 V |
| Operating Voltage Range | 5 V to 34 V | 5 V to 34 V (same) | 5 V to 34 V (same) | 5 V to 34 V (same) | 5 V to 34 V (same) | 4 V to 28 V |
| AEC-Q100 Qualified | No | No | No | No | No | Yes (AEC-Q100 Grade 1) |
| Thermal Shutdown | Auto-restart | Auto-restart (same) | Auto-restart (same) | Auto-restart (same) | Auto-restart (same) | Auto-restart (same) |
| Logic Input | CMOS, active-high | CMOS, active-high (same) | CMOS, active-high (same) | CMOS, active-high (same) | CMOS, active-high (same) | CMOS, active-high (same) |
| Approx. Unit Price (1k qty) | $1.32 | $1.32 (same) | $1.65 | $1.45 | $1.50 | $1.85 |
Key Differentiators
- Lowest RDS(on) in PROFET MINI family (vs BTS4140N)
- Tape-and-reel variant with same-day shipping (vs ITS4100S-SJ-N (bulk tube))
- 60V load-dump tolerance (vs TPS1H100BPHPRQ1)
Design Notes
At 1 A continuous load with RDS(on) of 70 mOhm, the ITS4100S-SJ-N dissipates approximately 70 mW internally under steady-state conditions. The PG-DSO-8 package thermal resistance (theta_JA) is approximately 90 C/W on a standard JEDEC 2s2p test board, yielding a junction temperature rise of ~6C above ambient at full load. For sustained high-current operation, expand copper pour under the exposed pad and consider thermal vias to inner planes. Source: Infineon PROFET family thermal guidelines.
Place the 1 nF ceramic output capacitor (COUT) directly between the OUT pin and GND, within 5 mm of the IC. Add a 100 nF ceramic bypass capacitor close to the VBB pin to suppress supply transients. The exposed thermal pad of the PG-DSO-8 package must be soldered to a copper area of at least 1 cm squared for proper thermal performance. Keep high-current traces wide (at least 0.5 mm per ampere) to minimize voltage drop and trace heating.
Do not omit the reverse-battery protection network. Without a series diode or P-channel MOSFET at VBB, reverse polarity will destroy the ITS4100S-SJ-N. Ensure the logic input voltage never exceeds the absolute maximum of VBB + 0.3 V, or use a series resistor to limit input current. For inductive loads, verify that the demagnetization energy does not exceed the device's EAS rating; add an external TVS diode if driving large relays or solenoids. Per Infineon, the ITS4100S-SJ-N is NOT AEC-Q100 qualified - choose ITS4100S-SJ-N-Q1 for automotive applications.
Compliance Information
RoHS and REACH compliant per Infineon product page. Not AEC-Q100 qualified - choose ITS4100S-SJ-N-Q1 variant for automotive applications. Halogen-free status not explicitly stated in available data.
