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SF3 - Managed 8-port Rugged Ethernet Switch with M12

3U 19" Industrial Stand-Alone Device

This product has been discontinued.

The SF3 is a stand-alone, managed industrial Fast Ethernet switch that comes in a compact 3U, 22HP, 19" cassette. It was specifically designed for rugged mobile systems, e.g., in transportation.

Download data sheet

  • SF3 Product ImageSF3 Railway Ethernet Switch
  • SF3 Product Image

Main Features

  • Managed 8-port rugged Ethernet switch
  • 3U, 22 HP, 19" rack mountable
  • 8 Fast Ethernet ports on M12 connectors
  • Power over Ethernet PSE functionality
  • Configuration via Telnet CLI, SNMP ver. 3 or external dongle
  • Service interface via D-Sub
  • LEDs for port, PoE and board states
  • Wide input range PSU (14.4 to 154 V), EN 50155 qualified
  • -40 to +70(+85)°C according to EN 50155 Class Tx with qualified components
  • Conformal coating
SF3 Product Image

Technical Data

Key Features
  • Simple Switch replacement: configuration can be done via external dongle without any tools
  • High-speed non-blocking, store-and-forward switching
  • Eight 10/100Base-T ports at front panel (Electrical isolation: 1500 Vrms)
  • Port configuration: copper, 10/100 Mbit/s
  • Auto-negotiation / Auto MDI/MDIX crossover on all ports / manual configuration possible
  • Layer2-based Policy Control List
  • 8K MAC address lookup table with automatic learning and aging
  • Up to 4096 VLANs
  • Rapid Spanning Tree Protocol and Multiple Spanning Tree Protocol to ensure loop free topology formation
  • Reducing multicast traffic in the network through multicast snooping - IGS (IPv4) and MLDS (IPv6)
Management Firmware System Features
  • Saving and restoring user configurations
  • Software upgrades through TFTP
  • System logs (syslog) and e-mail alerts for critical events
  • Remote monitoring (RMON) and alarm generation
  • Displaying the running configuration in the form of CLI commands
  • Management interfaces through
    • CLI (RS232 console, Telnet, SSH)
    • SNMP v3
  • Switch configuration can be loaded from external dongle
Management Firmware Security Features
  • User authentication using IEEE 802.1x
  • Controlling management access through SNMP and CLI only from authorized managers
  • MAC based and IP based access list (ACL) for traffic filtering
  • Rate-limiting and storm control to prevent packet flooding from malicious peers
Supported Protocols and Standards
  • DHCP client / server / relay (IEEE 1394)
  • Ethernet flow control (IEEE 802.3x)
  • GARP (VLAN-aware bridging)
  • GVRP/GMRP support (IEEE 802.1D, 2004)
  • Hypertext Transport Protocol (HTTP) Server for Remote Management and Monitoring (RFC2626)
  • HTTP Secure (HTTPS) - HTTP-based Remote Management over encrypted data channel (RFC2818)
  • IGMP snooping / IGMP proxy / IGMP Querier / MLD Discovery (RFC 4541)
  • Link aggregation LACP / EtherChannel (IEEE 802.3ad, 2005)
  • Link Layer Discovery Protocol LLDP (IEEE 802.1ab, 2005)
  • Multiple Spanning Tree (MSTP) (IEEE 802.1s)
  • Path MTU Discovery Protocol (PMTUD) (RFC 1984)
  • Priority-based switching, Quality of Service/DiffServ, tagged frames, Layer2-based 801.1Q VLAN-ID packet routing (IEEE 802.1p)
  • Port-based authentication with EAP (IEEE 802.1x - REV2004/RFC3748)
  • Power over Ethernet support (IEEE 802.3af / IEEE 802.3at, Type 1)
  • Rapid Spanning Tree Protocol (RSTP IEEE 802.1w)
  • Remote Network Monitoring Information Base v1 (RFC2819)
  • Secure Shell (SSH) for Remote Configuration (CLI) over secure channel
  • Secure Sockets Layer - Encrypted Data Exchange (RFC5246)
  • SNMP v1, v2c, v3 management
  • Syslog (RFC 5424)
  • TCP/IP v4 and v6
  • TFTP (RFC 1350)
  • VLAN/port-based VLANs GVRP/MVRP (IEEE 802.1Q Rev D5.0, 2005)
Power Over Ethernet Features
Power over Ethernet functions on ports 1 and 2
  • PSE (Power Sourcing Equipment) function
  • Supplies one PD class 0 device or two PD class 2 devices (up to 15W total)
Service Interface
  • 9-pin D-Sub connector at front
  • RS232 / V24
  • I2C interface for external dongle
Front I/O
  • Eight Ethernet ports via M12 connectors
  • One service interface via 9-pin D-Sub plug connector
  • One power input via mixed 7-pin D-Sub plug connector
  • Sixteen link and activity Ethernet status LEDs (two per channel)
  • Four Power over Ethernet status LEDs, two each for ports 1 and 2
  • Status LEDs for power, reset and error codes
Electrical Specifications
  • Power supply unit
    • 14.4..154 VDC wide range according to EN 50155
  • Isolation (according to EN 50155)
    • Input/output: 1500 Vrms
    • Input/shield: 1500 Vrms (7W2 D-Sub power connector: 1000 Vrms)
    • Output/shield: 1500 Vrms
    • Ground/shield: 1500 Vrms
    • Service connector: 1000 Vrms
  • Power consumption: 24 W (incl. 15 W PoE)
Mechanical Specifications
  • 19" rack-mount standard
  • Dimensions: 3U, 22HP, 168 mm depth
  • Weight: 970 g
Environmental Specifications
  • Temperature range (operation):
    • -40..+70°C (qualified components, +85°C for ten minutes according to EN50155 Class Tx)
  • Temperature range (storage): -40..+85°C
  • Relative humidity (operation): max. 95% non-condensing
  • Relative humidity (storage): max. 95% non-condensing
  • Altitude: -300 m to + 3000 m
  • Shock: according to EN 60068-2-27
  • Bump: according to EN 60068-2-29
  • Vibration (sinusoidal): according to EN 60068-2-6
  • Conformal coating
375 109 h @ 40°C according to IEC/TR 62380 (RDF 2000)
  • PCBs manufactured with a flammability rating of 94V-0 by UL recognized manufacturers
EMC Conformity
  • EN 55022 (radio disturbance)
  • EN61000-4-2 (ESD Immunity)
  • IEC 61000-4-4 (burst)
  • IEC 61000-4-5 (surge)
Software Support
Firmware for configuration and management included


Ethernet-powered version without PSU (on request)
Class 2 Powered Device supplied via Ethernet Port 1
  • No internal power supply unit
Some of these options may only be available for large volumes.
Please ask our sales staff for more information.

Ordering Information

Miscellaneous Accessories

Cable set for G302, RSx and 19" rack-mountable SFx switches, consisting of: 4 Ethernet cables (M12 to RJ45), 1 service adapter (M12 to D-sub), 1 service cable, 1 dongle adapter (D-Sub to M12), 1 power cable (M12 to open end), -40 to +85°C


I2C dongle for F302, G302 and managed SFxx switches, 512Kb, D-Sub, -40 to +85°C



Ethernet Switch Firmware for managed RSx, SFx, F302 and G302 models