ITS4142NHUMA1 - 1.4A Smart High-Side Switch SOT-223 | Infineon
MPN： ITS4142NHUMA1 ✓ 啟用中ITS4142NHUMA1 概覽
What is a high-side power switch? A high-side power switch is a semiconductor device placed between the positive supply rail and the load. By switching on the high side, the load is referenced to ground when off, eliminating ground loops and improving safety in industrial automation. High-side switches belong to the broader category of power distribution switches within power management ICs. Compared to low-side switches or electromechanical relays, smart high-side switches provide on-resistance control, fault feedback, and protection features in a single monolithic IC.
The ITS4142N integrates short-circuit protection with current limitation, overload protection, overvoltage protection including load-dump transients, undervoltage shutdown with auto-restart and hysteresis, and inductive-load switching capability. These features enable it to drive resistive, inductive, and capacitive loads in harsh 12 V and 24 V automotive and industrial environments. The logic-level input is compatible with 3.3 V and 5 V microcontrollers, simplifying digital control.
Architecturally, the device uses Infineon's SIPMOS vertical power MOSFET technology, which minimizes on-state conduction losses versus lateral MOSFETs. The integrated charge pump drives the gate of the N-channel FET to provide a true low-resistance path from supply to load. An onboard thermal shutdown circuit protects the die during overload events, while open-drain diagnostic feedback signals fault conditions to the host microcontroller.
Typical applications include 24 V industrial PLC outputs, automotive body-control modules, relay replacement in HVAC and lighting systems, programmable logic controller digital outputs, and solenoid or valve drivers. With its wide operating voltage range and embedded protection, the ITS4142N is well suited for IEC 61131-2 compliant industrial digital outputs.
When designing with this part, ensure that input debouncing and proper TVS protection are applied to the load lines for long-term reliability, and verify junction temperature under worst-case continuous load. A key design trade-off is RDS(on) versus quiescent current; the ITS4142N favors low on-resistance for minimal load-side dissipation.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, supporting both new designs and relay-replacement retrofits.
直接替換替代品，適用於 ITS4142NHUMA1 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ITS4142NHUMA1 （相同外形與佔位） — 差異在於 Package, Topology, Operating Temperature Range, Continuous Load Current, Diagnostic Output.
ITS4141NHUMA1
✅ 直接替換聯絡詢價
查看資料表 →ITS4140NHUMA1
✅ 直接替換聯絡詢價
查看資料表 →ITS4880R
✅ 直接替換聯絡詢價
查看資料表 →BSP75NHUMA1
✅ 直接替換📋 參考替代品（不在目錄中）
VNN1NV04P-E
✅ 直接替換📋 參考替代品（不在目錄中）
ITS4142NHUMA1 最大額定值與電氣特性
| Manufacturer | Infineon Technologies |
| Product Type | Smart High-Side Power Switch |
| 拓撲 | 1:1 N-Channel High-Side |
| 輸出數量 | 1 |
| Continuous Load Current | 1.4 A |
| 工作電源電壓 | 5 V to 34 V (load-dump tolerant to 45 V) |
| Logic Input Voltage | Logic-level, 3.3 V and 5 V compatible |
| Overvoltage Protection | Yes, including load dump |
| Undervoltage Shutdown | Yes, with auto-restart and hysteresis |
| Short Circuit Protection | Yes, with current limitation |
| Overload Protection | Yes |
| 過熱關機 | Yes |
| Diagnostic Feedback | Yes, open-drain status output |
| Inductive Load Switching | Yes, with internal clamping |
| 工作溫度 | -40C to +125C (junction) |
| 封裝 | PG-SOT223-4 (4-pin SOT-223) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
ITS4142NHUMA1 腳位配置
| 腳位 1 | IN — Logic-level input (3.3V/5V compatible), drives gate of high-side FET |
| 腳位 2 | GND — Logic ground / signal return |
| 腳位 3 | Vbb — Supply voltage (5 V to 34 V), connected to load via drain of internal N-FET |
| 腳位 4 | ST — Open-drain diagnostic status output |
典型應用
ITS4142NHUMA1 適用於 6 應用s: 24V Industrial PLC Digital Output, Automotive Body Control Module (BCM), Relay Replacement in HVAC Controls, Solenoid and Valve Driver, LED Lighting Driver (Industrial), Industrial Sensor Power Switch.
24V Industrial PLC Digital Output
The ITS4142NHUMA1 is well suited as a digital output driver for 24 V industrial PLC modules conforming to IEC 61131-2. Its 1.4 A continuous rating handles solenoid, valve, and indicator loads directly, while embedded short-circuit and overcurrent protection satisfy the IEC 61131-2 abnormal-operation test. The open-drain diagnostic pin reports wire-break and overload faults back to the PLC scan engine. With operating voltage from 5 V to 34 V and load-dump tolerance to 45 V, the part tolerates the harsh 24 V industrial bus transients without external protection.
推薦
Automotive Body Control Module (BCM)
The ITS4142NHUMA1 fits automotive BCM channels driving 12 V lighting, mirror-fold, door-lock, and seat-adjustment actuators. The integrated load-dump protection meets ISO 7637 pulse 5a/5b requirements, and the short-circuit current limit protects against harness faults. Thermal shutdown recovers automatically when the fault clears. Use the open-drain status pin to flag fault conditions over CAN or LIN to the BCM host controller.
推薦
Relay Replacement in HVAC Controls
For HVAC control boards replacing legacy electromechanical relays, the ITS4142NHUMA1 provides silent, bounce-free switching of 24 V damper motors, fan stages, and valve solenoids. Compared to a 24 V relay, it eliminates coil inrush, contact wear, and audible click noise, while the embedded diagnostics enable predictive maintenance alerts. The PG-SOT223-4 footprint allows drop-in PCB replacement of an existing relay footprint with minimal rework.
推薦
Solenoid and Valve Driver
The ITS4142NHUMA1 is rated for switching inductive loads with internal active clamping, making it a direct driver for 12 V or 24 V hydraulic solenoids, pneumatic valves, and latching relays in industrial automation. With 1.4 A continuous rating it covers most small-to-medium valve actuators. Designers must verify that the load's stored inductive energy (1/2 L I^2) does not exceed the ITS4142N datasheet single-pulse avalanche rating to avoid long-term reliability degradation.
推薦
LED Lighting Driver (Industrial)
For industrial 24 V LED indicator strips and architectural lighting drivers, the ITS4142NHUMA1 provides PWM-dimmable high-side current switching with embedded overcurrent and overtemperature protection. With a 3.3 V or 5 V logic-level input, it can be driven directly by a microcontroller PWM output at frequencies up to the datasheet limit. The diagnostic feedback indicates open-load and shorted-load conditions, useful for lamp-out detection in industrial fixture arrays.
推薦
Industrial Sensor Power Switch
The ITS4142NHUMA1 can switch power to 24 V field sensors (proximity, photoelectric, level) and IO-Link sensor supplies, providing programmable hot-swap and short-circuit isolation per sensor channel. The undervoltage shutdown with auto-restart protects sensors from brown-out events during heavy motor loads on the same 24 V rail. Diagnostic feedback reports per-channel health back to the IO-Link master.
推薦
推薦產品摘要
工程參考資料，適用於 ITS4142NHUMA1 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ITS4141NHUMA1 | ITS4140NHUMA1 | ITS4880R | BSP75NHUMA1 | VNN1NV04P-E |
|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | STMicroelectronics |
| Package | PG-SOT223-4 | PG-SOT223-4 | PG-SOT223-4 | PG-SOT223-4 | PG-SOT223-4 | SOT-223 (verify pinout) |
| Topology | High-Side N-Channel Smart Switch | High-Side N-Channel Smart Switch | High-Side N-Channel Smart Switch | High-Side Smart Switch | High-Side N-Channel Smart Switch | High-Side N-Channel OMNIFET |
| Continuous Load Current | 1.4 A | ~0.7 A | ~0.4 A | ~2 A | ~1 A | ~1 A |
| Operating Voltage Range | 5 V to 34 V | 5 V to 34 V | 5 V to 34 V | 5 V to 34 V | 5 V to 34 V | 5 V to 36 V |
| Diagnostic Feedback | Open-drain status | Open-drain status | Open-drain status | Open-drain status | Open-drain status | Status output (verify pin) |
| Load-Dump Protection | Yes (45 V) | Yes | Yes | Yes | Yes | Yes |
| Short-Circuit Protection | Yes (current limit) | Yes | Yes | Yes | Yes | Yes |
主要差異化特點
- Single-channel 1.4 A smart high-side switch in compact PG-SOT223-4 (對比ITS4141NHUMA1)
- Integrated load-dump protection up to 45 V (對比Discrete N-MOSFET + fuses + TVS approach)
- Open-drain diagnostic feedback for fault reporting (對比VNN1NV04P-E (STMicroelectronics))
設計說明
Estimated: with the PG-SOT223-4 thermal pad soldered to ~1 square inch of copper, theta_JA is typically 60-80 C/W. At 1.4 A continuous load and RDS(on) on the order of 100-200 mOhm, junction temperature rise above ambient is in the 15-30 C range - well within the 125 C limit. For continuous operation at maximum load in enclosed industrial cabinets, increase copper area to 2-3 square inches and provide airflow to maintain margin.
Use a large copper pour under the SOT-223 tab (pin 3 / thermal pad) to maximize heat dissipation. Place input RC filter on the logic IN pin within 5 mm of the IC to reject high-frequency noise from industrial motor inverters. Provide a 100 nF ceramic bypass capacitor directly across Vbb to GND, and route the diagnostic pin away from switching power traces to avoid false triggering.
Do not connect the load between Vbb and the IC drain (pin 3) in reverse - this is a high-side switch and the load must return to GND, not to Vbb. Exceeding the inductive avalanche rating (E_AS) by switching highly inductive loads without external clamping causes long-term degradation even if the device survives each event. Always size the load's stored energy (1/2 L I^2) against the datasheet E_AS rating.
Keep the high-current load trace (from pin 3 / tab) short and wide to minimize voltage drop during inrush events. Use a star-ground topology so that the ITS4142N ground pin sees the same ground as the host MCU ground, preventing logic-level misinterpretation. Place TVS diodes on Vbb for additional load-dump protection if the application exceeds ISO 7637 worst-case transients.
合規資訊
RoHS compliant per Infineon product page. HUMA1 suffix designates industrial grade (not AEC-Q100); AEC-Q100 automotive grade variants exist in the PROFET family but require a different order code. Halogen-free status not stated in the verified web data.
