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SDS300 Series High-End Layer-2 Din-Rail Switch 8F8T
SDS300 Series High-End Layer-2 Din-Rail Switch 8F8T
SDS300 Series High-End Layer-2 Din-Rail Switch 8F8T
SDS300 Series High-End Layer-2 Din-Rail Switch 8F8T
SDS300 Series High-End Layer-2 Din-Rail Switch 8F8T
SDS300 Series High-End Layer-2 Din-Rail Switch 8F8T

SDS300 Series High-End Layer-2 Din-Rail Switch 8F8T

Supports multiple self-healing rings; ring recovery <50 ms (typical)

Supports IEC 62439 MRD ring media redundancy protocol

Any two ports can form a self-healing ring; multiple independent rings supported

IP40 protection rating

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Product Overview

The SDS300 high-end Layer-2 DIN-rail industrial switch supports up to 16 Gigabit copper ports + 4 100/1000BaseX SFP ports. Any two ports can form a self-healing ring. Multiple independent rings are supported with dual fiber, single fiber, twisted pair, or combinations. Hardware-based ring recovery is <50 ms (typical). IEC62439-based MRD ring media redundancy is also supported.

SDS300 high-end Layer-2 DIN-rail industrial switches offer high stability and reliability with local and remote monitoring of key operating parameters. Extended industrial design and process suit harsh and outdoor environments.

Certifications

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FAQ

  • The cable is connected, but the port will not come UP / the link is down. What should I check?

    +

    1) Confirm an industrial-grade cable and proper RJ45 crimping. 2) Check speed/duplex settings; set both ends to auto-negotiation. 3) Check whether the port is administratively shut down, in the wrong VLAN, or restricted by port security.

  • What are the PoE power specifications?

    +

    Standard PoE and PoE+ are supported, with max per-port power of 15.4 W and 30 W respectively. Total system power budget must be calculated during selection to avoid insufficient supply when too many PDs are connected.

  • Which ring protocols are supported, and what is the self-healing time?

    +

    Mainstream industrial ring protocols such as ERPS (G.8032), RSTP/STP, MRP, and PRP are supported. ERPS typical self-healing is ≤50 ms; traditional RSTP is second-level. It is recommended to use one ring protocol consistently across the network.

  • How should I choose between Layer-2 and Layer-3 industrial switches?

    +

    Layer-2 switches: basic features such as VLAN, ring networks, and port mirroring; suited to access layers and same-subnet networking with strong cost performance. Layer-3 switches: add static routing, OSPF, DHCP relay, multicast, and other routing features—choose these when cross-subnet communication or core/aggregation networks are required.

  • Can non-OEM SFP optical modules work normally?

    +

    The device is compatible with generic IEEE 802.3 SFP modules. Non-OEM modules can usually be recognized, but some brands may have compatibility issues. OEM modules are recommended.

  • How do I restore factory settings if I forget the device login password?

    +

    1) Hardware reset: press and hold the RESET button for 5–10 seconds; the device reboots to factory defaults. 2) Software reset: use the vendor NMS to restore factory settings remotely. All custom configurations will be cleared after restore.

  • What are the power supply requirements for industrial switches?

    +

    DC models support 18–60 VDC or 9.6–60 VDC; AC models support 100–240 VAC, with dual redundant power inputs. Phoenix terminal wiring; reverse-polarity protection is built in so normal reverse connection will not damage the device.

  • What are the operating temperature range and protection rating of industrial switches?

    +

    All-metal aluminum alloy housing. Operating temperature is -40°C to +75°C; premium wide-temperature models reach -40°C to +85°C. Typical enclosure rating is IP40.

Features

High-performance, flexibly configurable linear switch

Supports multiple self-healing rings; ring recovery <50 ms (typical)

Supports MRD ring media redundancy protocol based on IEC62439

Any two ports can form a self-healing ring; multiple independent rings supported

Redundant dual power input design

Protection rating IP40

Specifications

IEEE 802.3 CSMA/CD Method and Physical Layer Specifications

IEEE 802.1p Priority Queuing

IEEE 802.1q VLAN Tagging

IEEE 802.1d Spanning Tree Algorithm

IEEE 802.1w Rapid Spanning Tree

IEEE 802.1s Multiple Spanning Tree

IEEE 802.1x Authentication

IEEE 802.3ac VLAN Tagging

IEEE 802.3ad Link Aggregation

IEEE 802.3af/at PoE

IEEE 802.3x Flow Control

IEEE 802.3 Ethernet

IEEE 802.3u Fast Ethernet

IEEE 802.3z Gigabit Ethernet

IEEE 802 Networks

RFC 768 UDP

RFC 791 IP

RFC 792 ICMP

RFC 793 TCP

RFC 826 ARP

RFC 854 Telnet Client & Server

RFC 862 Echo Protocol

RFC 863 Discard Protocol

RFC 1027 Using ARP to Implement Transparent Subnet Gateways (Proxy ARP)

RFC 1059, 1119 NTPv1/2

RFC 1112 IGMP

RFC 1191 Path MTU Discovery

RFC 1542 Bootstrap Extensions & DHCP Relay Agent

RFC 1851 The ESP Triple DES Transform

RFC 1994 PPP Challenge Handshake Authentication Protocol (CHAP)

RFC 2068 HTTP

RFC 213 DHCP Server

RFC 2138 RADIUS

RFC 2139 RADIUS Accounting

RFC 2236 IGMPv2

RFC 2474 DiffServ Precedence

RFC 2475 DifffServ Core and Edge Router Functions

RFC 2597 DiffServ Assured Forwarding

RFC 2598 DiffServ Expedited Forwarding

RFC 2644 Directed Broadcasts

RFC 2865 Remote Authentication Dial In User Service (RADIUS) remote user dial-in authentication service

RFC 3046 DHCP Relay Agent Information Option

RFC 3222 Forwarding Information Base (FIB)

GMRP (GARP Multicast Registration Protocol)

GVRP (GARP VLAN Registration Protocol)

SSH2 Secure Shell 2

IGMP Snooping

SNMPv3

  • Hardware Performance -

    Backplane bandwidth56Gbps
    Switching Technologystore-and-forward
    MAC address table8K
    packet buffer4.1 Mbits
    switching rate148,800 pps per Fast Ethernet port; 1,488,000 pps per Gigabit port

  • Software Features +

    Management MethodsBrowser, serial, Telnet, SSH 2.0, Syslog, STD-17 MIB-II, STD-58 SMIv2, STD-59 RMON, STD-62 SNMPv3, SNMPv2c, SNMPv1, RFC2925 Ping MIB, MRD Private MIBs,
    DiagnosticsIndicators, log files, relay, RMON, port mirroring, TRAP
    RedundancySTP, RSTP, MSTP, port aggregation
    time synchronizationNTP ，SNTP
    other4K VLANs, IPv4/IPv6 multicast, storm control, MC/BC protection, Jumbo Frame support

  • Power Parameters +

    Connectivity1 removable 5-PIN terminal
    Input voltage9.6 ~ 60VDC & 18 ~ 30VAC dual input; 48 ~ 54VDC dual input (PoE models)
    overload current protectionsupport
    reverse polarity protectionsupport
    Power consumption≤28W (excluding PD)

  • Physical Characteristics +

    MountingDin-Rail mounting
    shellAluminum alloy sheet-metal housing
    Protection ratingIP40
    Product dimensions (W× H × D)77mm x 140mm x 110mm (±0.3）
    Weight≤ 1.0kg

  • Environmental Characteristics +

    Storage Temperature‐40°C ~ 85°C
    Operating temperature‐40°C ~ 75°C
    humidity5% ~ 95% (non-condensing)

  • Mechanical Characteristics +

    vibrationIEC 60068-2-6
    impactIEC 60068-2-27
    free fallIEC 60068-2-31
    circuit boardCompliant with IPC standards

  • Electromagnetic Characteristics +

    EMI radiationFCC 47 CFR Part 15 Class A
    EN55032 Class A
    EN55035 Class A
    EMCIEC(EN)61000-4-2, Level 4
    IEC(EN)61000-4-4, Level 4
    IEC(EN)61000-4-5, Level 4
    IEC(EN)61000-4-6, Level 3
    IEC(EN)61000-4-8, Level 5

  • Industry Certification & Testing +

    Product SafetyEN 62368-1
    EMCEN 55032
    EN 55035
    EN I EC61000-3-2
    EN 61000-3-3
    FCC Part 15 Subpart B C lass A
    otherMinistry of Public Security test report, network access license, RoHS

Dimensions

DimensionsDimensions

Accessories

modelProduct Specification
SDS300-B16R808016-port DIN-rail Layer-2 managed industrial switch: 8×10/100/1000BaseT copper + 8×100/1000BaseX SFP slots (SFP modules not included), aluminum sheet-metal housing, redundant dual power 12/24/48VDC and 24VAC, operating temperature -40～75°C. IP40, one management Console port. DIN rail, monitoring cable and one power cable included.
SDS300-B16P8080P16-port DIN-rail Layer-2 managed industrial switch: 8×10/100/1000BaseT PoE copper + 8×100/1000BaseX SFP slots (SFP modules not included), aluminum sheet-metal housing, redundant dual 48~54VDC power, operating temperature -40～75°C. IP40, one management Console port. DIN rail, monitoring cable and one power cable included.
SDS300-B20R40G020-port DIN-rail Layer-2 managed industrial switch: 16×10/100/1000BaseT copper + 4×100/1000BaseX SFP slots (SFP modules not included), aluminum sheet-metal housing, redundant dual power 12/24/48VDC and 24VAC, operating temperature -40～75°C. IP40, one management Console port. DIN rail, monitoring cable and one power cable included.

Hotline: 86-21-58330762

Zip: 201203

Email: sales@mrdcom.net

Address: No.123 Curie Road, China (Shanghai) Pilot Free Trade Zone

Copyright 2026 MRD Co LTD . All Rights Reserved Shanghai ICP No.12035199

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