Forlinx OK3506-S12: RK3506J based Mini SBC for Low-Power Industrial IoT

OK3506-S12: RK3506J based Mini SBC

The OK3506-S12 is an RK3506J based Mini SBC designed for developers needing a compact and low-power platform for industrial and IoT applications. Powered by the Rockchip RK3506J SoC with three Cortex-A7 cores up to 1.5GHz and a Cortex-M0 coprocessor, it delivers an efficient balance of performance and power consumption ideal for control systems, edge devices, and automation.

Developed under the Forlinx OK3506 series, this Mini SBC offers flexible interfaces, long-term availability, and a software environment optimized to reduce development time. Its small footprint, low heat output, and enhanced storage management make it highly suitable for reliable 24/7 deployment in industrial environments.

It features a 40-pin Raspberry Pi-compatible GPIO header. We have previously covered several SBCs and development boards with similar compatibility, such as the LattePanda IOTA, Radxa Dragon Q6A, ADLINK I-Pi SMARC, RUBIK Pi and more. Feel free to check those out as well if you are interested in similar products.

OK3506-S12 Mini SBC Top Side

Forlinx OK3506-S12 Mini SBC Specifications:

• Processor: Rockchip RK3506J with 3x Cortex-A7 cores @ up to 1.5GHz + 1x Cortex-M0 coprocessor
• Memory: 256MB or 512MB DDR3
• Storage: 256MB or 512MB NAND Flash (eMMC version optional, no SDIO)
• GPU: 2D graphics engine
• Display:
  • 1x MIPI-DSI, 2-lane, up to 1.5Gbps per lane
  • 1x RGB888, up to 1280 x 1280 @60Hz
• Expansion: 40-pin Raspberry Pi-compatible GPIO header
• Connectivity:
  • 2x USB 2.0 (1x OTG)
  • 2x 10/100Mbps RMII Ethernet
  • 2x CAN-FD
  • Up to 6x UART, 3x I²C, 3x SPI
• Additional interfaces:
  • FLEXBUS / DSMC for PSRAM, FPGA, or LCD
  • 4x SARADC (10-bit, up to 1MS/s)
  • 12x PWM (11 usable)
  • Up to 76x GPIO
  • 4x SAI audio, 1x SPDIF, 1x PDM mic
• Power consumption: ~0.7W under load
• Operating temperature: 0°C to +70°C
• Dimensions: 44 x 35 mm SoM (Stamp-hole, 146 pins, 1mm pitch)

Forlinx OK3506-S12 Mini SBC Specifications

The board runs a Linux 6.1 BSP with real-time extensions, AMP, and LVGL support, making it suitable for responsive industrial control and HMI applications. It features eMMC health monitoring for long-term reliability in 24 x 7 environments, and its software stack enables fast development with easy integration of sensors, displays, and communication protocols with minimal customization.

The RK3506J Mini SBC is available through Forlinx and its distributors in multiple configurations based on memory and storage. A standard 512MB RAM + NAND version typically costs around $100 per unit, with discounts offered for volume orders. Developers can also request custom quotes directly from Forlinx based on project requirements and shipping location.

Images used courtesy of Forlinx.