SmartFlex SR303


SmartFlex SR303 - Flexible, Modular LTE Router with Wi-Fi
CE is a mandatory standard for products on the market in the European Economic Area. By CE marking a product, the manufacturer ensures that the item meets the essential safety requirements set out in the applicable CE directive.
This product fully adheres to the Restriction of Hazardous Substances Directive 2002/95/EC, RoHS for short.  The directive covers the restriction of use of certain hazardous substances in electrical and electronic equipment and was adopted in February 2003 by the European Union.
Underwriters Laboratories (UL) is an independent product safety certification organisation based in the United States. UL develops standards for products, materials, components, assemblies, tool and equipment, mainly dealing with product safety.
The e-Mark is a widely recognised standard in the automotive industry covering the safety requirements of automotive vehicles and their components across Europe. These products are e13 certified and have been designed for the transportation and road vehicle industry.
The Federal Communications Commission (FCC) is an independent agency of the United States government that sets standards and governs the testing of conducted and radiated emissions such as EMI.
SmartFlex SR303 Modular LTE Router
SmartFlex SR303
Featured in:Routers
11 SmartFlex SR303 versions available

Add to quote list

Add the SmartFlex SR303 to your quote list to send to our sales team for a quote on all your chosen products
Version information
Lead time*
Add to quote list**
SmartFlex SR303 with two Ethernet ports
SmartFlex SR303 with five Ethernet ports and Smartworx Hub
SmartFlex SR303 with two Ethernet ports, one RS-232/422/485 port and Smartworx Hub
SmartFlex SR303 with two Ethernet ports and one RS-232/485 port
SmartFlex SR303 with two Ethernet ports, one RS-232/485 port and Smartworx Hub
SmartFlex SR303 with five Ethernet ports, PoE PSE and Smartworx Hub
SmartFlex SR303 with two Ethernet ports, one RS-232/422/485 port, PoE PSE and Smartworx Hub
SmartFlex SR303 with two Ethernet ports, one RS-232/485 port, PoE PSE and Smartworx Hub
SmartFlex SR303 with five Ethernet ports, PoE PD and Smartworx Hub
SmartFlex SR303 with two Ethernet ports, one RS-232/422/485 port, PoE PD and Smartworx Hub
SmartFlex SR303 with two Ethernet ports, one RS-232/485 port, PoE PD and Smartworx Hub
Peripheral information
Lead time*
Add to quote list**
IO Cable 6-wire, 3m, v3 routers
PS Cable 2-wire, MO 2 pins, 3m, v3 routers
EU - Power Supply Power Cord
UK - Power Supply Power Cord
SmartFlex Power Supply, 12V/1A
SmartFlex Power Supply, 48V/1.35A (power cord required)
* Lead time is indicative and is subject to change at time of ordering. Next business day delivery on in-stock products only (when ordered before 3pm).
** Contact us for quantity or project pricing.
† Additional delivery charge may be incurred for certain postcodes (calculated at checkout)

SmartFlex SR303 overview

  • Powerful CPU and enhanced memory
  • Extended operational temperature range from -40°C to +75°C
  • Wide 10V to 60V DC operation with transient and reverse polarity voltage protection
  • Flexible port options – 3-port switch, Ethernet and RS-232/422/485
  • Serial ports with isolation
  • GPS and GLONASS support
  • MicroSD card holder, in/out, USB host
  • Low power consumption mode for solar and battery power applications
  • Optional industrial grade Wi-Fi
  • Optional PoE PSE or PoE PD on ETH0 and ETH1
  • Advanced security features

B+B SmartWorx SmartFlex industrial LTE routers are designed for tough environmental conditions at -40°C to 75°C operating temperature range (-20°C to 60°C LTE450 module). These routers feature an extremely powerful Cortex A8 CPU at 1.0GHz, 256MB flash memory, 512MB RAM, and 128KB M-RAM, providing full support for LTE speeds and applications. The SmartFlex LTE routers support real-time data encryption and the creation of VPN tunnels using IPsec, OpenVPN, and L2TP to ensure safe communication. The additional functions supported are DHCP, NAT, NAT-T, DynDNS, NTP, VRRP, control by SMS, and primary connection backups with softwares like SmartCluster VPN Server and R-SeeNet. These routers accept 10VDC to 60VDC input voltage range and are equipped with sleep mode for reducing electrical consumption.

The SmartFlex routers offer automatic wireless failover for wired networks, wireless connectivity for devices in remote locations where cable connections are impractical. The routers provide secure internet connectivity for devices and LANs via the cellular networks with up to 50Mbit/s upload speeds and up to 100Mbps download speeds. Typical applications include specialized Machine To Machine (M2M) devices, industrial IoT, LAN networks, Automatic Teller Machines (ATMs), and other self-service terminals.

Enquire about the SmartFlex SR303
Need more info or project pricing for the SmartFlex SR303?
T: +44 (0)1782 337 800 • E: SALES@IMPULSE-EMBEDDED.CO.UK
We want you to be the first to know about new products, technology solutions and exclusive industry news. To stay connected and receive marketing communications, select YES. (Remember, you are free to unsubscribe at any time.)

Secure remote access
We've helped numerous companies develop a secure remote access solution for machine monitoring and VPN access. With our SIM and hardware solution we will happily show you how.
Enquire now
Your Favourites
Wherever you see this heart symbol around the site, you can click to add things like products, articles and more to your favourites.
Build a quote list
Are you after more than one product, or need quantity pricing? Add products to your quote list and send it through to our team in one go!