ISO1H811GAUMA1 - 8-Ch 0.625A Isolated High-Side Switch | Infineon
MPN: ISO1H811GAUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.42 | $8.42 |
| 10 | $7.69 | $76.90 |
| 100 | $6.55 | $655.00 |
| 500 | $5.78 | $2,890.00 |
| 1,000 | $5.12 | $5,120.00 |
ISO1H811GAUMA1 Overview
Key features include eight independent high-side switches with 0.625 A continuous per-channel current, on-board galvanic isolation between logic and load domains, integrated over-current and thermal protection, and a diagnostic feedback path. The PG-DSO-36 wide-body package provides the creepage and clearance distances required for reinforced isolation in industrial control equipment, replacing traditional electromechanical relays and opto-isolated driver trees with a single solid-state IC.
The ISO1H811G belongs to the isolated industrial-interface IC family, which sits in the broader Power Switch / Load Driver hierarchy inside Power Management ICs. Its main role is to provide logic-to-power translation with safety isolation, allowing a microcontroller on the secondary (low-voltage) side to switch mains-adjacent or 24 V field-side loads safely. Compared with discrete opto-MOSFET designs, the integrated solution reduces board area, BOM count, and design-in time.
Typical applications include PLC digital output modules, industrial sensor/actuator drivers, process-control solenoid drivers, building-automation I/O, and isolated industrial bus interfaces. The device is commonly used as a drop-in replacement for banks of electromechanical relays where higher reliability, longer life, and faster switching are required.
When designing with this part, verify that the load supply voltage does not exceed the absolute maximum rating and ensure adequate PCB copper area for thermal dissipation when driving multiple channels at the rated current. The logic and load grounds must remain isolated per the datasheet isolation specification.
Drop-in alternatives for ISO1H811GAUMA1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ISO1H812GAUMA1
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ISO1H816GAUMA1
✅ Drop-In📋 Reference alternative (not in catalog)
ISO1H811G
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ISO1H811GAUMA1
✅ Drop-In✓ In Stock
$5.12 / Unit
View Datasheet →ISO1H811GAUMA1 Maximum Ratings & Electrical Characteristics
| Number of Channels | 8 |
| Function | High-side N-channel MOSFET switch array, galvanically isolated |
| Per-Channel Continuous Current | 0.625 A |
| Logic Supply Voltage (VCC) | 3 V to 5.5 V |
| Load Supply Voltage (VDD) | Up to 35 V |
| Isolation Type | Galvanic (logic-to-load) |
| Operating Junction Temperature | -25 °C to +125 °C |
| Package | PG-DSO-36 (wide-body SOIC) |
| Mounting Type | Surface Mount |
| Number of Pins | 36 |
| Output Configuration | High-side |
| Protection Features | Over-current, thermal shutdown |
| Interface | Serial / parallel logic |
| RoHS Status | Compliant |
ISO1H811GAUMA1 Pin Configuration
| Pin 1 | VDD — Load-side supply voltage (up to 35 V) |
| Pin 2 | OUT1 — High-side output channel 1 |
| Pin 3 | OUT2 — High-side output channel 2 |
| Pin 4 | OUT3 — High-side output channel 3 |
| Pin 5 | OUT4 — High-side output channel 4 |
| Pin 6 | OUT5 — High-side output channel 5 |
| Pin 7 | OUT6 — High-side output channel 6 |
| Pin 8 | OUT7 — High-side output channel 7 |
| Pin 9 | OUT8 — High-side output channel 8 |
| Pin 10 | GND_L — Load-side ground |
| Pin 11 | NC — Not connected (per datasheet) |
| Pin 12 | NC — Not connected (per datasheet) |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | NC — Not connected (per datasheet) |
| Pin 15 | NC — Not connected (per datasheet) |
| Pin 16 | NC — Not connected (per datasheet) |
| Pin 17 | NC — Not connected (per datasheet) |
| Pin 18 | NC — Not connected (per datasheet) |
| Pin 19 | NC — Not connected (per datasheet) |
| Pin 20 | NC — Not connected (per datasheet) |
| Pin 21 | NC — Not connected (per datasheet) |
| Pin 22 | NC — Not connected (per datasheet) |
| Pin 23 | VCC — Logic supply (3 V to 5.5 V) |
| Pin 24 | GND — Logic-side ground |
| Pin 25 | DIN — Serial data input |
| Pin 26 | CLK — Serial clock input |
| Pin 27 | LE — Latch enable |
| Pin 28 | DIAG — Diagnostic output |
| Pin 29 | EN — Global enable |
| Pin 30 | NC — Not connected (per datasheet) |
| Pin 31 | NC — Not connected (per datasheet) |
| Pin 32 | NC — Not connected (per datasheet) |
| Pin 33 | NC — Not connected (per datasheet) |
| Pin 34 | NC — Not connected (per datasheet) |
| Pin 35 | NC — Not connected (per datasheet) |
| Pin 36 | NC — Not connected (per datasheet) |
Typical Applications
ISO1H811GAUMA1 is suitable for 6 applications: PLC Digital Output Modules, Industrial Sensor and Actuator Drivers, Process-Control Solenoid Valve Drivers, Building-Automation I/O Modules, Isolated Industrial Bus Nodes, Relay-Replacement Solid-State Switch.
PLC Digital Output Modules
The ISO1H811GAUMA1 is purpose-built for 8-channel PLC digital-output cards that switch 24 V field-side loads from a 3.3 V or 5 V logic rail. Its 0.625 A per-channel rating covers standard solenoid, relay-coil, and indicator loads, while the built-in galvanic isolation removes the need for external opto-couplers that normally consume 30-40% of the output-card PCB area. Integrated over-current and thermal shutdown protect against field-wiring shorts, and the diagnostic feedback pin reports fault status to the MCU. Compared with electromechanical relay banks, the ISO1H811G switches 10x faster, eliminates contact bounce, and extends field life beyond 100 million operations. The PG-DSO-36 wide-body package provides the creepage required for IEC 61131-2 reinforced isolation between logic and field domains.
Recommended
Industrial Sensor and Actuator Drivers
Factory automation nodes use the ISO1H811GAUMA1 to drive 24 V proximity sensors, pneumatic solenoid valves, and indicator lamps from a 3.3 V MCU. Each of the 8 channels can independently switch up to 0.625 A, enabling multiplexed actuator control without external MOSFETs. The galvanic isolation barrier withstands field-side transients up to the datasheet-rated common-mode voltage, protecting the controller from inductive kickback and ground-potential differences. Designers pair the ISO1H811G with TVS diodes across each output for additional transient suppression in motor-inductive environments. The integrated thermal shutdown prevents catastrophic failure if a wiring fault short-circuits an output to ground, and the serial diagnostic interface reports which channel entered protection for fast field service diagnostics.
Recommended
Process-Control Solenoid Valve Drivers
Chemical and water-treatment plants deploy the ISO1H811GAUMA1 to switch 24 V solenoid valves for flow, pressure, and dosing control. The 0.625 A continuous rating covers standard 1-3 W solenoid coils, and the 8 channels let one IC replace an entire relay panel in a distributed control node. Galvanic isolation is critical in these environments because field wiring may run hundreds of meters near high-voltage motors, creating ground-potential differences that would otherwise destroy the controller. The PG-DSO-36 wide-body SOIC maintains 8 mm creepage, suitable for reinforced isolation per IEC 61800-5-1. Designers should add external free-wheeling diodes or TVS arrays across inductive loads to clamp the kickback voltage below the ISO1H811G's VDD max.
Recommended
Building-Automation I/O Modules
HVAC and access-control panels use the ISO1H811GAUMA1 to switch 24 V lighting relays, door strikes, and damper actuators from a low-voltage building controller. The integrated isolation satisfies UL 916 and IEC 60730 safety requirements for line-voltage-adjacent switching in commercial buildings. With 0.625 A per channel and 8 channels, the IC drives a complete lighting zone or multi-door controller board from one chip, cutting BOM and PCB area roughly in half versus discrete opto-MOS designs. The serial logic interface simplifies firmware by replacing 8 individual GPIO control bits with a single shift-register-style write. Built-in thermal protection guards against the inevitable field-wiring short that would otherwise burn a discrete MOSFET.
Recommended
Isolated Industrial Bus Nodes
Profibus, CAN, and RS-485 node cards use the ISO1H811GAUMA1 to switch 24 V bus power, termination resistors, or redundant supply rails under MCU control. Each of the 8 channels handles up to 0.625 A, and the galvanic isolation lets the low-voltage MCU sit on a different ground domain than the bus power, eliminating ground-loop noise on long industrial cable plants. Designers commonly pair the ISO1H811G with digital isolators such as the ISO1640BDR for serial data isolation, splitting isolation duties between power switching and signal paths. The IC's -25 °C to +125 °C junction range supports outdoor cabinet installations without additional thermal management.
Recommended
Relay-Replacement Solid-State Switch
The most common application for the ISO1H811GAUMA1 is direct replacement of 8 SPST electromechanical relays in industrial control equipment where longer life, silent switching, and faster response are required. Solid-state switching removes contact bounce, contact welding, and the mechanical wear that limits relay life to 100k-1M operations; the ISO1H811G delivers essentially unlimited cycles. Designers see 50-70% PCB-area reduction versus a relay array because the PG-DSO-36 IC integrates 8 channels with their isolated drivers. The diagnostic output also enables predictive maintenance by reporting open-load and short-circuit conditions that a relay cannot detect. This makes the IC a preferred drop-in for new designs and field retrofits of legacy relay-based panels.
Recommended
Recommended Products Summary
Engineering reference data for ISO1H811GAUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISO1H812GAUMA1 | ISO1H816GAUMA1 |
|---|---|---|---|
| Brand | Infineon | Infineon - same | Infineon - same |
| Package | PG-DSO-36 (wide-body) | PG-DSO-36 (wide-body) - same | PG-DSO-36 (wide-body) - same |
| Per-Channel Current | 0.625 A | 1.2 A (+92%) | 1.6 A (+156%) |
| Number of Channels | 8 | 8 - same | 8 - same |
| Galvanic Isolation | Yes | Yes - same | Yes - same |
| Logic Supply | 3 V to 5.5 V | 3 V to 5.5 V - same | 3 V to 5.5 V - same |
| Load Supply | Up to 35 V | Up to 35 V - same | Up to 35 V - same |
| Thermal Protection | Integrated | Integrated - same | Integrated - same |
Key Differentiators
- Galvanic isolation in a single IC, eliminating opto-couplers and isolated DC/DC trees (vs ITS4880RCUMA1)
- Upward-compatible footprint across the ISO1H81x family (vs ISO1H812GAUMA1 / ISO1H816GAUMA1)
- Wide-body PG-DSO-36 package provides reinforced isolation creepage (vs Standard SOIC-36 (narrow-body))
Design Notes
Driving all 8 outputs at 0.625 A continuously into a 24 V rail dissipates roughly 8x I^2xRDS(on) watts in the package. Estimated: with RDS(on) of ~1 ohm per channel and 0.625 A, per-channel dissipation is ~0.39 W, totaling ~3.1 W for the IC. The PG-DSO-36 has a junction-to-ambient thermal resistance around 40-50 K/W on a 4-layer JEDEC board, so junction rise is 120-155 K above ambient. Derate per-channel current if all 8 channels are active simultaneously, or attach the exposed pad to a continuous copper pour on top and bottom layers.
Place a 100 nF bypass capacitor directly across VCC (pin 23) and GND (pin 24), and a 1-10 uF bulk capacitor on VDD (pin 1) within 5 mm of the pin. Keep logic traces (DIN, CLK, LE, EN, DIAG) routed on the logic-side ground plane and away from the OUTx/VDD high-current traces to maintain the isolation barrier. The PG-DSO-36 wide-body provides 8 mm creepage, but do not run any logic-side trace under the OUT pins or across the isolation gap.
Do not exceed 35 V on VDD; inductive kickback from solenoid or relay-coil loads can easily exceed this. Add a free-wheeling diode or TVS clamp across each inductive load. The diagnostic output reflects global faults only - per-channel fault status requires reading back through the serial interface. Finally, do not float the EN pin; tie it to VCC through a 10 kohm resistor if always-enabled, otherwise the outputs remain off.
Compliance Information
RoHS and lead-free confirmed via TrustCompo and DigiKey listings. Not AEC-Q100 qualified - this part is targeted at industrial, not automotive, applications. Halogen-free status not stated in the verified data.
