VNI4140KTR-32 - Quad 1A High-Side SSR, 41V, PowerSSO-24 | STMicroelectronics
MPN： VNI4140KTR-32 ✓ 啟用中VNI4140KTR-32 概覽
A high-side solid-state relay is a semiconductor switch that replaces mechanical relays by using power MOSFETs to switch DC loads, offering silent operation, long life, fast switching, and built-in protection. The VNI4140KTR-32 sits in the power distribution hierarchy as a smart high-side driver, which is a category of power management IC that combines a switching element, gate drive, and diagnostic feedback in one device for industrial automation, body electronics, and IEC 61131-2 compliant PLC outputs.
Key features include very low on-resistance (0.08 ohm typ), 1 A per-channel continuous current, integrated fast demagnetization of inductive loads, configurable latched or self-resetting thermal shutdown, per-channel open-load detection, short-circuit and overcurrent protection, and under-voltage lockout. The exposed bottom pad delivers a Rth(JA) suitable for 1 A operation on a standard 4-layer PCB without heatsinking.
Typical applications include four-channel industrial PLC digital outputs (IEC 61131-2), programmable logic controller field-side switches, industrial sensor power distribution, building automation relay replacement, and multi-channel 24 V solenoid/valve drivers. Each channel can replace an electromechanical relay with PCB-friendly footprint and silent operation.
Designers should ensure the charge pump bypass capacitor is placed as close to the VCC and GND pins as possible, route each output channel separately to minimize cross-talk, and use the exposed pad as the primary thermal path. The diagnostic output pin (DIAG) is multiplexed across channels and should be read in time-slotted fashion to identify the faulting channel during commissioning.
直接替換替代品，適用於 VNI4140KTR-32 — 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： VNI4140KTR-32 （相同外形與佔位） — 差異在於 Package, Topology, Number of Channels, Continuous Output Current per Channel, Device Type.
VNI4140K-32
✅ 直接替換聯絡詢價
查看資料表 →VNI4140KTR
✅ 直接替換📋 參考替代品（不在目錄中）
VND5160AJTR-E
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →VNI4140KTR-32 最大額定值與電氣特性
| Device Type | Quad High-Side Smart Power Solid State Relay |
| Number of Channels | 4 |
| 拓撲 | High-Side Switch, N-Channel MOSFET |
| Supply Voltage Range | 10.5 V to 36 V |
| Maximum Operating Supply | 41 V |
| On-Resistance R_DS(on) (typ) | 0.08 ohm per channel |
| Continuous Output Current per Channel | 1 A |
| 工作溫度範圍 | -40 °C to +125 °C |
| 封裝 | PowerSSO-24 (Exposed Bottom Pad) |
| 安裝類型 | Surface Mount |
| Lead-Free / RoHS | Yes / Compliant |
| Integrated Protections | Overcurrent, Short-Circuit, Over-Temperature, Under-Voltage Lockout |
| Diagnostic Output | Yes (per-channel open-load, fault, thermal) |
| Charge Pump | Yes (integrated, for gate drive) |
| Fast Demagnetization of Inductive Loads | Yes (internal) |
| Conformance | IEC 61131-2 (industrial PLC outputs); ESD IEC ±25 kV |
VNI4140KTR-32 腳位配置
| 腳位 1 | IN1 — Channel 1 logic input (CMOS/TTL compatible) |
| 腳位 2 | OUT1 — Channel 1 high-side output |
| 腳位 3 | NC — Not connected (per datasheet) |
| 腳位 4 | GND — Ground reference |
| 腳位 5 | OUT2 — Channel 2 high-side output |
| 腳位 6 | IN2 — Channel 2 logic input |
| 腳位 7 | VCC — Supply voltage (10.5 V to 36 V) |
| 腳位 8 | IN3 — Channel 3 logic input |
| 腳位 9 | OUT3 — Channel 3 high-side output |
| 腳位 10 | NC — Not connected (per datasheet) |
| 腳位 11 | GND — Ground reference |
| 腳位 12 | OUT4 — Channel 4 high-side output |
| 腳位 13 | IN4 — Channel 4 logic input |
| 腳位 14 | DIAG — Diagnostic / open-load flag output |
| 腳位 15 | VCC-IS — Current sense / supply input |
| 腳位 16 | CP — Charge pump capacitor node |
| 腳位 17 | NC — Not connected (per datasheet) |
| 腳位 18 | GND — Ground reference |
| 腳位 19 | GND — Ground reference |
| 腳位 20 | NC — Not connected (per datasheet) |
| 腳位 21 | NC — Not connected (per datasheet) |
| 腳位 22 | NC — Not connected (per datasheet) |
| 腳位 23 | NC — Not connected (per datasheet) |
| 腳位 24 | NC — Not connected (per datasheet) |
| 腳位 EP | GND (Exposed Pad) — Exposed bottom pad - primary thermal path, MUST be soldered to PCB copper |
典型應用
VNI4140KTR-32 適用於 6 應用s: Industrial PLC Digital Outputs (IEC 61131-2), Building Automation Relay Replacement, Industrial Sensor Power Distribution, Solenoid and Valve Driver Arrays, Multi-Channel 24V DC Load Switching in Industrial PCs, Multi-Light LED Indicator Panels.
Industrial PLC Digital Outputs (IEC 61131-2)
The VNI4140KTR-32 is engineered to drive four 24 V digital outputs in industrial PLCs with IEC 61131-2 conformance. With 1 A per channel and integrated open-load detection, the part allows on-resistance conduction losses as low as 80 mV at full load, exceeding PLC electromagnetic compatibility requirements. Designers typically connect one channel per field-side terminal and read the multiplexed DIAG pin to detect wire breaks or shorts. The exposed pad PowerSSO-24 package is footprint-compatible with standard PLC I/O modules, simplifying PCB layout reuse across multiple product variants.
推薦
Building Automation Relay Replacement
The VNI4140KTR-32 directly replaces electromechanical relays driving 24 V lighting, blinds, and HVAC actuators in building automation systems. Each of the four channels handles 1 A continuous load with silent semiconductor switching - no acoustic noise, no contact bounce, and a ten-fold longer operational life than equivalent mechanical relays. The integrated fast demagnetization handles inductive valve and motor windings common in building controls, while per-channel diagnostics let the host controller identify burned-out lamps or wiring faults for predictive maintenance alerts. PCB area shrinks versus equivalent 4-relay designs.
推薦
Industrial Sensor Power Distribution
Use the VNI4140KTR-32 to switch four 24 V sensor supplies (proximity sensors, photoelectric switches, solenoid valves) from a single master controller. With 1 A per channel, multiple sensors can be powered from one output, and the channel-by-channel current limit rejects sensor short circuits without disrupting the other channels. The under-voltage lockout ensures sensors reset cleanly after supply brownouts common in industrial cabinets, while diagnostic feedback reports which channel faulted - critical for SCADA systems needing field-side fault localization. Total PowerSSO-24 PCB area is roughly 18 mm x 18 mm including thermal pad.
推薦
Solenoid and Valve Driver Arrays
The VNI4140KTR-32 drives up to four proportional or on/off solenoid valves in hydraulic/pneumatic systems, with internal fast demagnetization of inductive energy handling the kick-back from valve coils without external freewheel diodes. Designers select the 1 A variant to handle the 700 mA-1 A typical hold currents of 24 V valves with margin for inrush. The exposed-pad PowerSSO-24 layout sustains all four channels at 1 A simultaneously in standard industrial enclosures with passive cooling, simplifying thermal design versus discrete MOSFET solutions.
推薦
Multi-Channel 24V DC Load Switching in Industrial PCs
Embed the VNI4140KTR-32 inside industrial PCs and IIoT gateways to switch peripheral 24 V loads (fans, heaters, signal beacons, external indicator lights) from the host SBC. The four independent inputs IN1-IN4 are level-shifted to 3.3 V CMOS logic from the host processor, enabling software-controlled reboot of stuck peripherals. The diagnostic output pin folds back per-channel status to the host, supporting automatic recovery flow. With 1 A per channel and 36 V operational ceiling, it covers the standard industrial 24 V supply with substantial transient margin.
推薦
Multi-Light LED Indicator Panels
The VNI4140KTR-32 operates as a 4-channel driver for industrial LED tower lights, panel indicators, and warning beacons running off 24 V. Each channel's 1 A continuous rating supports high-brightness LED stacks or incandescent pilot lamps with proper derating. The chip's thermal protection and short-circuit detection shut down a faulty channel without disabling the others, ensuring safety-critical indicators like E-stops remain functional. With built-in diagnostic feedback, the machine controller can light specific LEDs based on system state without external driver transistors.
推薦
推薦產品摘要
工程參考資料，適用於 VNI4140KTR-32 — 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 | VNI4140K-32 | VNI4140KTR | VND5160AJTR-E |
|---|---|---|---|---|
| Package | PowerSSO-24 | PowerSSO-24 - same | PowerSSO-24 - same | PowerSSO-12 (2-channel, smaller) |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Channels | 4 | 4 | 4 | 2 |
| Output Current per Channel | 1.0 A | 1.0 A | 0.7 A | ~1.0 A |
| RoHS / Lead-Free | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes |
主要差異化特點
- Integrates 4 channels in a single PowerSSO-24 footprint (對比VND5160AJTR-E (2-channel PowerSSO-12))
- 1 A continuous per channel at full quad load (對比VNI4140KTR (no -32 suffix))
- Internal fast demagnetization of inductive loads (對比Discrete N-MOSFET + flyback diode solutions)
設計說明
At full 1 A on all 4 channels simultaneously, per-channel conduction loss is 80 mW (I² x R_DS = 1² x 0.08) giving a total package dissipation of 320 mW. With the PowerSSO-24 exposed pad soldered to a 4-layer 1 oz copper pour (estimated Rth(JA) ≈ 30-40 °C/W from the datasheet thermal curves), the junction temperature rise remains under 13 K above ambient - well within the 150 °C thermal-shutdown ceiling. Designers MUST keep the exposed pad continuous and unbroken in the copper layers to reach the rated 1 A operation.
Place the charge pump fly capacitor directly between the CP pin and VCC with traces as short and wide as possible (per ST VIPower reference design). Use 100 nF X7R minimum, rated 50 V to handle supply transients above 36 V. Each channel's OUT pin should route directly to its load terminal with a TVS clamp (e.g., SMAJ33CA) within 10 mm to absorb switching transients from inductive loads.
Route IN1-IN4 as tightly-coupled matched-length traces to the host controller so the host can read the diagnostic output DIAG in a fixed time-slot per channel without cross-talk. Add a 10 kohm pull-down on DIAG to avoid floating during controller reset. The exposed bottom pad should be stitched with a 4 x 4 via array (0.3 mm via diameter, 0.6 mm pitch) directly to the inner ground plane to minimize thermal impedance.
Do not connect the GND pins and exposed pad to noisy motor-return paths; the part's diagnostic accuracy depends on a clean 0 V reference. Do not exceed 41 V on VCC even transiently (load-dump on 24 V trucks can hit 36 V easily). Avoid driving channels with capacitance > 22 nF without a current-limiting resistor, since the fast inrush into large capacitive loads can trip the overcurrent protection and latch the channel off.
合規資訊
RoHS compliant per ST datasheet and LCSC product listing. Not AEC-Q100 qualified (industrial-grade part, not automotive). MSL rating per JEDEC J-STD-020 not specified in the verified data and should be confirmed on the device reel label before volume assembly.
