MDS-G4020-L3 Series

20G-port Layer 3 full Gigabit modular managed Ethernet switches

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Features and Benefits

  • Layer 3 routing interconnects multiple LAN segments
  • Multiple interface type 4-port modules for greater versatility
  • Tool-free design for effortlessly adding or replacing modules without shutting down the switch
  • Ultra-compact size and multiple mounting options for flexible installation
  • Rugged die-cast design for use in harsh environments
  • Intuitive, HTML5-based web interface for a seamless experience across different platforms


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The MDS-G4020–L3 Series modular switches support up to 20 Gigabit ports, including 4 embedded ports, 4 interface module expansion slots, and 2 power module slots to ensure sufficient flexibility for a variety of applications. The highly compact MDS-G4000–L3 Series is designed to meet evolving network requirements, ensuring effortless installation and maintenance, and features a hot-swappable module design that enables you to easily change or add modules without shutting down the switch or interrupting network operations.

The multiple Ethernet modules (RJ45, SFP, and PoE+) and power units (24/48 VDC, 110/220 VAC/VDC) provide even greater flexibility as well as suitability for different operating conditions, delivering an adaptive full Gigabit platform that provides the versatility and bandwidth necessary to serve as an Ethernet aggregation/edge switch. Featuring a compact design that fits in confined spaces, multiple mounting methods, and convenient tool-free module installation, the MDS-G4000–L3 Series switches enable versatile and effortless deployment without the need for highly skilled engineers. With multiple industry certifications and a highly durable housing, the MDS-G4000 Series can reliably operate in tough and hazardous environments such as power substations, mining sites, ITS, and oil and gas applications. Support for dual power modules provides redundancy for high reliability and availability while LV and HV power module options offer additional flexibility to accommodate the power requirements of different applications.

Support for Layer 3 routing functionality enables these switches to facilitate the deployment of applications across different networks, making them ideal for large-scale industrial networks. In addition, the MDS-G4000–L3 Series features an HTML5–based, user-friendly web interface providing a responsive, smooth user experience across different platforms and browsers.

  • Pre-installed Modules

    4 embedded Gigabit ports

  • Module

    4 slots for optional 4-port FE/GE modules

  • Slot Combination

    See the LM-7000H module series datasheet for more information

  • Standards

    IEEE 802.3 for 10BaseT
    IEEE 802.3u for 100BaseT(X) and 100BaseFX
    IEEE 802.3ab for 1000BaseT(X)
    IEEE 802.3z for 1000BaseX
    IEEE 802.3x for flow control
    IEEE 802.3ad for Port Trunk with LACP
    IEEE 802.1Q for VLAN Tagging
    IEEE 802.1D-2004 for Spanning Tree Protocol
    IEEE 802.1w for Rapid Spanning Tree Protocol
    IEEE 802.1p for Class of Service
    IEEE 802.1X for authentication
    IEEE 802.3af/at for PoE/PoE+ output

  • Management

    IPv4/IPv6, Flow control, Back Pressure Flow Control, DHCP Server/Client, ARP, RARP, LLDP, Port Mirror, Linkup Delay, SMTP, SNMP Trap, SNMP Inform, SNMPv1/v2c/v3, RMON, TFTP, SFTP, HTTP, HTTPS, Telnet, Syslog, Private MIB, Loopback interface

  • Filter

    GMRP, GVRP, GARP, 802.1Q VLAN, IGMP Snooping v1/v2/v3, IGMP Querier

  • Redundancy Protocols

    STP, RSTP, Turbo Ring v2, Turbo Chain, Ring Coupling, Dual-Homing, Link Aggregation

  • Routing Redundancy


  • Security

    Broadcast storm protection, Rate Limit, Trust access control, Static Port Lock, MAC Sticky, HTTPS/SSL, SSH, RADIUS, TACACS+, Login and Password Policy

  • Time Management

    SNTP, NTP Server/Client, NTP Authentication

  • Protocols

    IPv4/IPv6, TCP/IP, UDP, ICMP, ARP, RARP, TFTP, DNS, NTP Client, DHCP Server, DHCP Client, 802.1X, QoS, HTTPS, HTTP, Telnet, SMTP, SNMPv1/v2c/v3, RMON, Syslog

  • Unicast Routing

    OSPF, Static Route

  • MIB


  • MAC Table Size

    16 K

  • Max. No. of VLANs


  • VLAN ID Range

    VID 1 to 4094

  • IGMP Groups


  • Priority Queues


  • Packet Buffer Size

    12 Mbits

  • Console Port

    RS-232 (TxD, RxD, GND), 8-pin RJ45 (115200, n, 8, 1)

  • USB Connector

    USB Type A (Reserved)

  • Digital Input Channels

    1 (On MGMT Module)

  • Digital Inputs

    +13 to +30 V for state 1
    -30 to +3 V for state 0
    Max. input current: 8 mA

  • Alarm Contact Channels

    3 (On MGMT, PWR1, PWR2 Module)
    Relay output with current carrying capacity of 2 A @ 30 VDC

  • Input Voltage

    with PWR-HV-P48 installed:
    110/220 VDC, 110 VAC, 60 HZ, 220 VAC, 50 Hz, PoE: 48 VDC

    with PWR-LV-P48 installed:
    24/48 VDC, PoE: 48 VDC

    with PWR-HV-NP installed:
    110/220 VDC, 110 VAC, 60 HZ, 220 VAC, 50 Hz

    with PWR-LV-NP installed:
    24/48 VDC

  • Operating Voltage

    with PWR-HV-P48 installed:
    88 to 300 VDC, 90 to 264 VAC, 47 to 63 Hz, PoE: 46 to 57 VDC

    with PWR-LV-P48 installed:
    18 to 72 VDC (24/48 VDC for hazardous location), PoE: 46 to 57 VDC (48 VDC for hazardous location)

    with PWR-HV-NP installed:
    88 to 300 VDC, 90 to 264 VAC, 47 to 63 Hz

    with PWR-LV-NP installed:
    18 to 72 VDC

  • Input Current

    with PWR-HV-P48 installed:
    Max. 0.11 A @ 110 VDC
    Max. 0.06 A @ 220 VDC
    Max. 0.29 A @ 110 VAC
    Max. 0.18 A @ 220 VAC

    with PWR-LV-P48/PWR-LV-NP installed:
    Max. 0.53 A @ 24 VDC
    Max. 0.28 A @ 48 VDC

  • Max. PoE Power Output per Port

    36 W

  • Total PoE Power Budget

    Max. 360 W (with one power supply) for total PD consumption at 48 VDC input for PoE
    Max. 360 W (with one power supply) for total PD consumption at 53–57 VDC input for
    PoE+ systems
    Max. 720 W (with two power supply) for total PD consumption at 48 VDC input for PoE
    Max. 720 W (with one power supply) for total PD consumption at 53–57 VDC input for
    PoE+ systems

  • Overload Current Protection


  • Reverse Polarity Protection


  • IP Rating


  • Dimensions

    176 x 115 x 163.25 mm (6.93 x 4.53 x 6.44 in)

  • Weight

    2500 g (5.51 lb)

  • Installation

    DIN-rail mounting, Wall mounting (with optional kit), Rack mounting (with optional kit)

  • Operating Temperature

    Standard Temp Models: -10 to 60°C (-14 to 140°F)
    Wide Temp Models: -40 to 75°C (-40 to 167°F)

  • Storage Temperature (package included)

    -40 to 85°C (-40 to 185°F)

  • Ambient Relative Humidity

    5 to 95% (non-condensing)

  • Safety

    EN 62368-1, IEC 62368-1, UL 62368-1, IEC 60950-1

  • EMC

    EN 55032/35

  • EMI

    CISPR 32, FCC Part 15B Class A

  • EMS

    IEC 61000-4-2 ESD: Contact: 8 kV; Air: 15 kV
    IEC 61000-4-3 RS: 80 MHz to 1 GHz: 20 V/m
    IEC 61000-4-4 EFT: Power: 4 kV; Signal: 4 kV
    IEC 61000-4-5 Surge: Power: 4 kV; Signal: 4 kV
    IEC 61000-4-6 CS: 10 V
    IEC 61000-4-8 PFMF
    IEC 61000-4-11: Voltage Dips and Voltage Interruptions

  • Railway

    EN 50121-4

  • Traffic Control

    NEMA TS2

  • Shock

    IEC 60068-2-27

  • Freefall

    IEC 60068-2-31

  • Vibration

    IEC 60068-2-6

  • Hazardous Locations

    Class I Division 2, ATEX

  • Power Substation

    IEEE 1613, IEC 61850-3

  • Time

    1,007,790 hrs

  • Standards

    Telcordia SR332

Software, Firmware, and Drivers


Name Type Checksum Version Operating System Release Date
MXview v3.2.4 Software
389.2 MB
Software Package
  • Windows 10
  • Windows 7
  • Windows Server 2012 R2
  • Windows Server 2016
  • Windows Server 2019
Jul 16, 2021 Jul 16, 2021 Release notes
Software Package for MDS-G4000-L3 Series (SNMP MIB file)
362.8 KB
Software Package
Jul 04, 2021 Jul 04, 2021 Release notes
Firmware for MDS-G4000-L3 Series
64.6 MB
Jun 21, 2021 Jun 21, 2021 Release notes

Support Documents

Name Type Version Release Date
Moxa Managed Switch Next-generation Layer 3 OS Manual
1.9 MB
Manual v1.1 Oct 14, 2021 Oct 14, 2021
Moxa's Managed Switch Next-generation OS (v2.x) Layer 2 User's Manual (MDS-G4000-L3 Series)
6.9 MB
Manual v1.0 Jul 07, 2021 Jul 07, 2021
QIG for MDS-G4000-L3/MDS-G4000 Series
2.6 MB
QIG v1.2 Jun 21, 2021 Jun 21, 2021
Moxa Managed Switch Next-generation Layer 3 OS Manual
1.9 MB
Manual v1.0 Jun 21, 2021 Jun 21, 2021
Datasheet for MDS-G4020-L3 Series
1.3 MB
Datasheet v1.0 Jun 21, 2021 Jun 21, 2021
2D CAD for MDS-G4020-L3 Series
1.8 MB
2D CAD Jun 21, 2021 Jun 21, 2021
Moxa Layer 3 Managed Switch Next Generation OS Command Line Interface
1.2 MB
Manual v1.0 Jun 18, 2021 Jun 18, 2021

Available Models (2)

Show Images
moxa-mds-g4020-l3-image.jpg | MoxaMDS-G4020-L3moxa-mds-g4020-l3-t-image.jpg | MoxaMDS-G4020-L3-T
Total No. of Ports2020
100/1000BaseSFP SlotsUp to 16Up to 16
10/100/1000BaseT(X) Ports (RJ45 Connector)Up to 20Up to 20
PoE 10/100/1000BaseT(X) Ports (RJ45 Connector)Up to 16Up to 16
10/100BaseT(X) Ports (RJ45 Connector)Up to 16Up to 16
PoE 10/100BaseT(X) Ports (RJ45 Connector)Up to 16Up to 16
Operating Temp.-10 to 60°C-40 to 75°C
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MDS-G4020-L3 Series


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MDS-G4020-L3 Series


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Buy online from our distributors