A 3.5-inch single board computer (SBC) is a compact, all-in-one computing platform built on a standardized board measuring 146mm x 102mm. This form factor integrates the core components—CPU, memory, storage interfaces, and I/O ports—onto a single printed circuit board, offering a highly integrated and space-efficient solution for embedded and industrial applications. Unlike traditional desktop motherboards, these SBCs are designed for direct integration into custom enclosures or systems, providing a reliable computing core for dedicated tasks.
Key Specifications and Technical Details
The defining characteristic of a 3.5" SBC is its physical size, adhering to the PICMG industry standard. Technically, these boards typically feature low-power, fanless processors from Intel or ARM architectures, supporting soldered or socketed memory. Common I/O includes multiple USB ports (2.0/3.0), Gigabit Ethernet, HDMI/DisplayPort outputs, SATA connectors for storage, and expansion headers for GPIO, PCIe, or M.2 modules. They are engineered for wide voltage input ranges (e.g., 9-36V DC) and extended temperature operation, making them suitable for harsh environments.
Use Cases and Applications
The compact and robust nature of 3.5" SBCs makes them ideal for space-constrained and demanding applications. They are extensively used in:
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Digital Signage & Kiosks: Powering interactive displays and information terminals.
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Industrial Automation: Serving as the brain for PLCs, HMIs, and machine vision systems.
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IoT Gateways: Aggregating and processing data from sensors in edge computing networks.
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Transportation: In-vehicle infotainment, surveillance, and telematics systems.
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Medical Devices: Embedded within diagnostic and monitoring equipment.
Comparison with Other Form Factors
| Feature | 3.5" SBC | Mini-ITX Board | Raspberry Pi |
|---|---|---|---|
| Standard Size | 146mm x 102mm | 170mm x 170mm | 85mm x 56mm (Pi 4) |
| Primary Use | Industrial/Embedded Systems | Small Form Factor PCs | Hobbyist, Education, Light Prototyping |
| Ruggedness | High (Wide Temp, DC Input) | Standard (Consumer Grade) | Low (Consumer Grade) |
| I/O & Expansion | Industrial I/O (GPIO, CAN), PCIe/M.2 | Standard Desktop Ports, PCIe x16 | GPIO, USB, HDMI |
| Longevity | Long-term Availability (5-10+ years) | Standard Product Cycle | Shorter Product Cycle |
Thinvent's 3.5-Inch SBC Solutions
Thinvent offers a range of industrial-grade computing solutions that embody the integration and reliability principles of the 3.5" SBC form factor. Our compact, fanless systems, such as the Aero Mini PC series, utilize efficient Intel processors like the N100 to deliver robust performance in a small footprint. Designed for 24/7 operation with wide voltage input support, these systems are perfect for the embedded and edge computing applications mentioned above. Explore Thinvent's portfolio for durable, application-ready computers built for global industrial deployments.
