ISO8200BTR - Galvanic Isolated 8-Ch High-Side Smart SSR | STMicroelectronics
MPN: ISO8200BTR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.85 | $7.85 |
| 10 | $7.12 | $71.20 |
| 100 | $6.4 | $640.00 |
| 500 | $5.75 | $2,875.00 |
| 1,000 | $5.2 | $5,200.00 |
ISO8200BTR Overview
What is a galvanic isolated high-side smart SSR? A solid-state relay (SSR) is a semiconductor device that performs the same switching function as an electromechanical relay, but with no moving parts — switching is done with MOSFETs or BJTs. A high-side SSR switches the positive supply rail rather than ground. Galvanic isolation between logic and load domains provides safety and noise immunity: the digital control signals on the VDD side cannot pass hazardous voltages or high dv/dt transients back to the microcontroller side. In the system taxonomy: SSR → power distribution switch → power management IC → semiconductor. The ISO8200BTR belongs to the industrial-grade, multi-channel high-side driver category.
Key features include 700 mA continuous output current per channel, integrated 0.11 ohm RDS(on) high-side MOSFETs, 45 V load voltage rating, two galvanically isolated domains (logic and power), very low quiescent supply current, loss-of-ground protection, undervoltage lockout, exposed-pad PowerSO-36 slug-up package for superior thermal dissipation, and SPI-compatible cascadable digital interface. The slug-up exposed die pad enables low theta-JA for sustained multi-channel operation in industrial cabinets.
Technically, the ISO8200B uses bipolar junction logic, a precision bandgap reference, and charge-pump high-side drive to ensure the N-channel power MOSFETs are properly enhanced when the load is near VCC. Galvanic isolation is typically implemented with on-chip transformers in similar devices, achieving hundreds of volts of galvanic isolation between logic and power domains. The 0.11 ohm per-channel resistance keeps dissipation at ~77 mW per channel at 700 mA, allowing eight channels to be on simultaneously with manageable heat.
Typical applications include industrial PLC digital outputs, programmable logic relay modules, factory automation I/O, building automation, and any interface to 24 V solenoids, relays, lamps, valves, and small motors. The wide 45 V load rating tolerates industrial 24 V transients and 30 V supply rails in HVAC and process control.
When designing with this part, ensure adequate PCB copper area is allocated under the exposed slug-up pad; inadequate thermal dissipation is the most common cause of thermal-shutdown trips in multi-channel operation. Decouple VCC and VDD separately and respect the reset timing on a single-cycle shutdown command to avoid partial-output states.
Drop-in alternatives for ISO8200BTR — 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 ISO8200BTR (same form factor and footprint) — differing in Package, Product Type, Supply Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ISO8200B
✅ Drop-In📋 Reference alternative (not in catalog)
ISO8200BQ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ISO8200BTR Maximum Ratings & Electrical Characteristics
| Product Type | Galvanic Isolated 8-Channel High-Side Smart Solid-State Relay |
| Number of Channels | 8 |
| Topology | High-side switch |
| On-Resistance (per channel) | 0.11 ohm (typical) |
| Output Current per Channel | 700 mA |
| Load Voltage (max) | 45 V |
| Galvanic Isolation Domains | 2 (VCC power stage, VDD digital stage) |
| Supply Voltage Domains | VCC (logic/power), VDD (digital) |
| Quiescent Supply Current | Very low (per datasheet) |
| Protection Functions | Loss of GND, undervoltage shutdown, reset |
| Package | PowerSO-36 (slug up, thermally enhanced) |
| Mounting Type | Surface Mount |
| Operating Temperature | Industrial grade |
| RoHS Status | ROHS3 Compliant |
| Primary Application | Industrial PLC digital outputs / 24 V load switching |
ISO8200BTR Pin Configuration
| Pin 1 | OUT0 — Channel 0 high-side output |
| Pin 2 | OUT1 — Channel 1 high-side output |
| Pin 3 | OUT2 — Channel 2 high-side output |
| Pin 4 | OUT3 — Channel 3 high-side output |
| Pin 5 | OUT4 — Channel 4 high-side output |
| Pin 6 | OUT5 — Channel 5 high-side output |
| Pin 7 | OUT6 — Channel 6 high-side output |
| Pin 8 | OUT7 — Channel 7 high-side output |
| Pin 9 | GND — Power stage ground |
| Pin 10 | VCC — Power stage supply (load rail) |
| Pin 11 | NC — Not connected (per datasheet) |
| Pin 12 | VDD — Digital stage supply |
| Pin 13 | DGND — Digital stage ground |
| Pin 14 | RESET — Reset input (active high) |
| Pin 15 | CLK — Serial clock input |
| Pin 16 | DI — Serial data input |
| Pin 17 | DO — Serial data output (cascade) |
| Pin 18 | LE — Latch enable |
| Pin 19 | CS — Chip select |
| Pin 20 | FAULT — Fault output flag |
| Pin 21 | NC — Not connected (per datasheet) |
| Pin 22 | NC — Not connected (per datasheet) |
| Pin 23 | NC — Not connected (per datasheet) |
| Pin 24 | NC — Not connected (per datasheet) |
| Pin 25 | NC — Not connected (per datasheet) |
| Pin 26 | NC — Not connected (per datasheet) |
| Pin 27 | NC — Not connected (per datasheet) |
| Pin 28 | NC — Not connected (per datasheet) |
| Pin 29 | NC — Not connected (per datasheet) |
| 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 | EP — Exposed pad (slug up) — thermal pad, connect to GND |
Safe Operating Area (per channel)
Typical Applications
ISO8200BTR is suitable for 6 applications: Industrial PLC Digital Outputs, 24 V Solenoid and Valve Drivers, Building Automation and HVAC, Factory Automation I/O Modules, Programmable Logic Relay Modules, Process Control Signal Conditioning.
Industrial PLC Digital Outputs
The ISO8200BTR is purpose-built for industrial PLC digital output modules driving 24 V loads. Its 700 mA per-channel current rating and 45 V load voltage tolerance cover industrial 24 V bus rails plus transient overhead, while the 0.11 ohm typical on-resistance keeps per-channel dissipation around 77 mW at full load. The galvanic isolation between VDD (logic) and VCC (power) domains protects the microcontroller side from load-side faults. Eight channels per IC enable dense 16-point or 32-point output modules by cascading two ISO8200BTR devices via the digital bus. Integrated loss-of-GND, undervoltage lockout, and reset functions reduce external protection components, lowering BOM cost in production PLCs.
Recommended
24 V Solenoid and Valve Drivers
The ISO8200BTR directly switches 24 V industrial solenoids, pneumatic valves, and hydraulic valves with no external MOSFETs required. The 700 mA continuous per-channel rating covers most small-signal industrial valves, while the 45 V maximum rating tolerates inductive flyback transients with appropriate TVS protection. The PowerSO- design supports multi-valve banks with several channels on simultaneously. Galvanic isolation keeps the digital control domain safe from the harsh 24 V industrial environment. Designers typically add a TVS diode per channel or per rail to clamp inductive transients and protect the ISO8200BTR outputs.
Recommended
Building Automation and HVAC
The ISO8200BTR is well suited to building automation controllers that drive 24 V actuators, dampers, lighting relays, and HVAC valve actuators. The 45 V load rating accommodates 30 V supply rails found in some HVAC systems. The 8-channel density simplifies 8-zone damper control boards and multi-channel relay modules. The very low quiescent current reduces standby power in energy-conscious building systems. Galvanic isolation eliminates ground-loop issues between building automation controllers and remote HVAC equipment over long cable runs, improving system reliability in commercial installations.
Recommended
Factory Automation I/O Modules
The ISO8200BTR enables compact factory automation I/O modules with 8 isolated outputs per IC. The PowerSO- supports high-channel-density distributed I/O blocks with minimal PCB area. Galvanic isolation provides the 500 V+ required typically between field wiring and the safe-area logic side. The integrated reset and protection features allow fail-safe shutdown of all 8 outputs in one cycle, critical for E-stop circuits and machine safety applications. The digital bus enables cascading multiple ISO8200BTR devices for 16, 24, or 32-point output modules without additional glue ICs.
Recommended
Programmable Logic Relay Modules
The ISO8200BTR forms the high-side switch core of programmable logic relay (PLR) modules used in mid-complexity industrial control. Each of the 8 channels drives a relay coil, contactor, or indicator lamp at up to 700 mA. The 0.11 ohm on-resistance minimizes voltage drop to the load, ensuring reliable relay pull-in. Galvanic isolation between logic and load domains enables safe PCB layout mixing low-voltage MCU circuits with 24 V industrial wiring. The very low quiescent supply current extends battery life in portable PLR test equipment and hand-held diagnostic tools used in field service.
Recommended
Process Control Signal Conditioning
The ISO8200BTR provides 24 V output signal conditioning and isolation in process-control systems interfacing to legacy 24 V field instrumentation. The 45 V rating handles per-unit field voltage tolerances and inductive transients on long cable runs in chemical plants, refineries, and water-treatment facilities. Galvanic isolation prevents ground loops between process-control cabinets separated by hundreds of meters of conduit. The cascadable digital interface simplifies multi-board distributed I/O racks that share a single isolation barrier across an entire control panel.
Recommended
Recommended Products Summary
Engineering reference data for ISO8200BTR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISO8200B | ISO8200BQ |
|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | PowerSO-36 (slug up) | PowerSO-36 (slug up) - same | PowerSO-36 (slug up) - same |
| Number of Channels | 8 | 8 | 8 |
| On-Resistance (per channel) | 0.11 ohm | 0.11 ohm | 0.11 ohm |
| Output Current per Channel | 700 mA | 700 mA | 700 mA |
| Load Voltage (max) | 45 V | 45 V | 45 V |
| Galvanic Isolation | Yes (VCC/VDD domains) | Yes (VCC/VDD domains) | Yes (VCC/VDD domains) |
| Packaging Format | Tape & Reel | Tray | Tape & Reel |
| Automotive Grade | No | No | Yes (AEC-Q100) |
| RoHS Compliance | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Key Differentiators
- Galvanic isolation between logic and power domains (vs ISO8200B)
- Integrated 8-channel density in single IC (vs Discrete high-side MOSFET drivers)
- PowerSO-36 slug-up package for top-side cooling (vs Standard SOIC packages)
Design Notes
Estimated: at 700 mA per channel and 0.11 ohm RDS(on), each channel dissipates approximately 54 mW (I²R = 0.74² × 0.11). With 8 channels on simultaneously, total dissipation approaches 430 mW. The PowerSO-36 slug-up package achieves theta-JA of approximately 30 C/W with 1 sq inch of copper on the top-side heatsink (the slug-up design is intended for top-side cooling). Without adequate copper or top-side heatsinking, junction temperature can rise 25-30 C, triggering thermal shutdown at high ambient temperatures. Always provision top-side copper area or a small clip-on heatsink for industrial-cabinet designs where all 8 outputs may run simultaneously.
Route the VCC (load) and VDD (logic) power domains with separate, isolated copper pours to maintain galvanic isolation creepage and clearance. The exposed pad must be soldered to a copper pour connected to GND for optimal thermal performance. Place input decoupling capacitors (10 uF + 100 nF) on each supply pin within 2 mm of the package. Keep high-current load traces wide (>= 0.5 mm per 100 mA) and minimize loop area between channel output and load ground return.
Do not exceed 45 V on any load pin — inductive transients on solenoid or relay loads require external TVS diode clamping (e.g., 33 V or 36 V TVS) across each load. The loss-of-GND protection assumes the load ground is referenced through the load itself, not the ISO8200BTR ground pin. When driving inductive loads, add a flyback diode or TVS to prevent output overvoltage. The serial interface (CLK/DOUT/CS_LE) timing must respect the datasheet setup and hold times — violations cause unpredictable output behavior on cascaded devices.
Compliance Information
ROHS3 compliant per PartGenie listing. Not AEC-Q100 qualified in standard grade; ISO8200BQ is the AEC-Q100 automotive variant. REACH and halogen-free status not explicitly stated in provided data.
