IE-3105-18T2C-E – 18x1G Copper Ports – 2x1G Combo Uplinks

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Cisco IE-3105-18T2C-E Compatible Accessories, Modules & Spare Parts

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IE-3105-18T2C-E Description

IE-3105-18T2C-E is a Cisco Catalyst IE3105 Rugged Series DIN-rail industrial Ethernet switch for OT access cabinets that need high-density copper connectivity. It provides 18 10/100/1000 RJ45 downlinks, two 1000BASE-T/1000BASE-X dual-media combo uplinks, Network Essentials, an FPGA data path, dual DC inputs, and 36.7W power consumption for compact industrial edge deployments.

Quick Specs

Parameter

Specification

Product ID

IE-3105-18T2C-E

Product type

DIN-rail industrial Ethernet switch

Default software license

Network Essentials

Total ports

20 Gigabit Ethernet ports

Downlink ports

18 x 10/100/1000 RJ45 copper ports

Uplink interfaces

2 x 1000BASE-T/1000BASE-X dual-media combo ports

FPGA data path

Yes

Layer 2 NAT scope

IE3105 uplink ports GigabitEthernet1/1 and GigabitEthernet1/2

PoE role

Non-PoE data model with no PoE budget listed

Power input

Dual DC inputs

Nominal input voltage

12V to 48V nominal

Absolute input voltage

9.6V to 60V absolute

Power consumption

36.7W

Product Performance

Ports
Forwarding Rate
MAC Addresses

Key Features

IE3105 enhanced ordering identity

IE-3105-18T2C-E is the Cisco-listed 18T2C IE3105 SKU with Network Essentials and FPGA data path, so it should not be treated as the matching IE-3100-18T2C-E base model.

Eighteen copper downlinks

The access side uses 18 10/100/1000 RJ45 downlink ports, which keeps the endpoint plan in Gigabit copper rather than PoE, Fast Ethernet, or SFP-only access.

Dual-media uplink block

Each uplink position can be planned around 1000BASE-X SFP or 1000BASE-T copper media, and Cisco notes that the SFP side has priority when both media types are active by default.

L2NAT on IE3105 uplinks

Cisco’s IE31xx security guide limits Layer 2 NAT support on IE3105 to uplink ports GigabitEthernet1/1 and GigabitEthernet1/2, which makes the uplink role a design check rather than a downlink assumption.

Dual DC input architecture

The data sheet places this model in the dual-DC-input group with 12V to 48V nominal input and 9.6V to 60V absolute input, so power-source sizing should follow the industrial enclosure plan.

Rugged DIN-rail deployment profile

Cisco describes the IE3100 platform for DIN-rail industrial enclosures with temperature, vibration, shock, surge, and electrical-noise hardening for harsh environments.

Application Scenarios

High-density industrial copper aggregation

IE-3105-18T2C-E fits cabinets where many PLCs, HMIs, sensors, drives, cameras, or other Ethernet-enabled industrial devices need 1G RJ45 access from a compact DIN-rail switch.

Duplicate-IP machine integration

Use this IE3105 model when the design needs Cisco-documented Layer 2 NAT on the two uplink interfaces to integrate machine networks that reuse private IPv4 addressing.

Combo-uplink OT access refresh

The SKU works for industrial access refreshes where the BOM needs 18 copper endpoints and the uplink decision may be either rugged SFP fiber or RJ45 copper instead of a fixed SFP-only model.

Product Comparison

Parameter

IE-3105-18T2C-E

IE-3100-18T2C-E

IE-3105-8T2C-E

Product type

Industrial Ethernet switch

Industrial Ethernet switch

Industrial Ethernet switch

Default software license

Network Essentials

Network Essentials

Network Essentials

Total ports

20

20

10

10/100/1000 RJ45 copper ports

18

18

8

1GE SFP ports

No fixed SFP-only ports listed

No fixed SFP-only ports listed

No fixed SFP-only ports listed

1GE combo ports

2

2

2

FPGA data path

Yes

No

Yes

Layer 2 NAT support

IE3105 uplink ports only

Not an IE3105 variant

IE3105 uplink ports only

PoE power budget

No PoE budget listed

No PoE budget listed

No PoE budget listed

Power input

Dual DC inputs

Dual DC inputs

Dual DC inputs

Nominal input voltage

12V to 48V

12V to 48V

12V to 48V

Power consumption

36.7W

36.7W

28W

MTBF

642050 hours

642050 hours

774680 hours

  • In an IE-3105-18T2C-E vs IE-3100-18T2C-E comparison, both SKUs keep 20 total ports, 18 RJ45 downlinks, two combo uplinks, Network Essentials, and 36.7W power consumption; the difference is the IE3105 FPGA data path and IE3105 L2NAT scope.
  • The IE-3105-18T2C-E vs IE-3105-8T2C-E difference is copper density: IE-3105-18T2C-E has 18 RJ45 downlinks and 20 total ports, while IE-3105-8T2C-E has eight RJ45 downlinks and 10 total ports.
  • For buyers deciding which model to choose, the IE-3105-18T2C-E comparison should confirm whether the project needs the IE3105 enhanced feature set and the 18-downlink footprint in the same line item.

Selection Guide

1. Choose it for IE3105 18-port access

Select IE-3105-18T2C-E when the BOM requires 18 Gigabit copper downlinks, two dual-media uplinks, Network Essentials, and Cisco’s IE3105 enhanced feature boundary.

2. Use IE-3100-18T2C-E for the base 18T2C class

Move to IE-3100-18T2C-E only when the same port layout is needed without the IE3105 FPGA data path and IE3105 L2NAT positioning.

3. Step down to IE-3105-8T2C-E for smaller cabinets

Use IE-3105-8T2C-E when the design still needs the IE3105 class but eight copper downlinks are enough for the enclosure.

4. Confirm the uplink and power accessories separately

Check rugged SFPs, copper uplink preference, industrial DC supply sizing, SD card needs, and DIN-rail installation hardware before the quote is released.

Ordering Checklist

Review area

Required confirmation

Procurement risk

Exact PID

Cisco PID IE-3105-18T2C-E with Network Essentials

Prevents substituting the base IE-3100-18T2C-E or the lower-density IE-3105-8T2C-E

Endpoint count

18 x 10/100/1000 RJ45 downlink ports

Avoids selecting an 8-port IE3105 model for an 18-device cabinet

Uplink media

Two 1000BASE-T/1000BASE-X dual-media uplinks

Confirms whether the order needs rugged SFP optics or RJ45 uplink cabling

L2NAT design

L2NAT planned only on IE3105 uplink ports GigabitEthernet1/1 and GigabitEthernet1/2

Keeps NAT assumptions out of downlink-port design

Power design

Dual DC inputs sized for 12V to 48V nominal and 36.7W consumption

Prevents enclosure power supplies and wiring from being undersized

Installation environment

DIN-rail cabinet with industrial temperature, shock, vibration, and grounding practices reviewed

Reduces staging risk in harsh OT locations

Service accessories

SD card, rugged SFPs, console cable, and IE power supplies ordered only when required

Avoids assuming optional items are included with the base switch

Optional Add-ons

Model

Description

PWR-IE50W-AC=

Cisco Industrial Ethernet 50W AC power supply option for IE deployments

PWR-IE50W-AC-L=

Cisco Industrial Ethernet 50W AC low-profile power supply option

PWR-IE65W-PC-DC=

Cisco Industrial Ethernet 65W DC power supply option

PWR-IE65W-PC-AC=

Cisco Industrial Ethernet 65W AC power supply option

GLC-SX-MM-RGD=

Cisco rugged 1000BASE-SX SFP listed for IE3100 SFP support

GLC-LX-SM-RGD=

Cisco rugged 1000BASE-LX/LH SFP listed for IE3100 SFP support

GLC-ZX-SM-RGD=

Cisco rugged 1000BASE-ZX SFP listed for IE3100 SFP support

SD-IE-16GB=

Cisco IE 16GB SD card option for industrial Ethernet switches

IE-3105-18T2C-E Front Panel Overview

The illustrations in this section provide an overview of the variety of components available on the various switch models in this product family. Not all models are illustrated.

Number

Feature

Number

Feature

1

Dual-media SFP ports (uplinks)

6

Power connectors A and B

2

Dual-media copper ports (uplinks)

7

RJ-45 console connector

3

1000BASE-T ports (downlinks)

8

Express Setup button

4

SD card slot and USB micro port cover

9

Alarm connector

5

Protective ground connection

 

 

Specifications

Parameter Specification Parameter Specification
SKU IE-3105-18T2C-E Product type DIN-rail industrial Ethernet switch
Default software license Network Essentials Total ports 20 Gigabit Ethernet ports
RJ45 copper downlinks 18 x 10/100/1000 ports Dual-media uplinks 2 x 1000BASE-T/1000BASE-X combo ports
Fixed SFP-only ports No fixed SFP-only ports listed for this PID FPGA data path Yes
Layer 2 NAT scope IE3105 uplink ports GigabitEthernet1/1 and GigabitEthernet1/2 PoE budget No PoE budget listed for this data model
Power input Dual DC inputs Nominal input voltage 12V to 48V
Absolute input voltage 9.6V to 60V Max current at 12V 4.2A
Max current at 24V 2.6A Max current at 48V 1.3A
Power consumption 36.7W DRAM 4GB
User-accessible flash 1.5GB SD card capacity 1GB, 4GB, or 16GB optional SD card
Removable storage note SD card is optional and not shipped by default Alarm I/O 2 dry-contact alarm inputs and 1 alarm output
Console ports 1 RS-232 via RJ45 and 1 micro USB Mounting DIN rail
Operating system Cisco IOS XE Forwarding rate 29.76 Mpps
Forwarding bandwidth 20 Gbps Queues 8 egress queues
Unicast MAC addresses 8000 VLAN scale 256 VLANs
IPv4 indirect routes 2000 Operating temperature -40C to 75C in blower-equipped cabinet
Storage temperature -40C to 85C Relative humidity 5% to 95% noncondensing
Operating altitude Up to 15000 ft with no temperature derating Ingress protection IP30
MTBF 642050 hours Industrial protocol support EtherNet/IP CIP, Modbus, SCADA, GOOSE, and PROFINET MRP
Management Cisco Catalyst Center, WebUI, CLI, SNMP, and open APIs Warranty Five-year limited hardware warranty
L2NAT rule scale 128 Layer 2 NAT rules    

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Need pricing, stock, or shipping details for the IE-3105-18T2C-E ? Layer23-Switch can help you check current availability, lead time, and delivery options for this. Send us the part number, quantity, and destination country via live chat or email sales@layer23-switch.com for a fast quotation.

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    5.0

    Asked about a future order — they remembered our previous purchase and made the new quote easy.

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    Posted on 15/09/2025
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    Grand service! Arrived fast to Ireland.

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    Posted on 08/07/2025
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    Maximum effort on the shipping! Got here super fast. Chimichangas!

Questions & Answers

  • Why would a plant choose IE-3105-18T2C-E?

    IE-3105-18T2C-E fits dense industrial cabinets needing 18 10/100/1000 copper device ports, 2 GE combo uplinks, Network Essentials, and DIN rail mounting.
  • What does IE-3105-18T2C-E do with combo uplinks?

    IE-3105-18T2C-E uses two GE combo uplinks, so each upstream link is planned as either SFP fiber or RJ45 copper with media priority understood.
  • Can IE-3105-18T2C-E power field devices?

    IE-3105-18T2C-E is non-PoE; powered cameras, radios, or sensors need separate power or a PoE-capable IE3100 model in the same cabinet.
  • What installer mistake can happen on IE-3105-18T2C-E dual-media ports?

    IE-3105-18T2C-E installers can patch both copper and SFP on a combo uplink; Cisco notes SFP takes default priority unless media type is changed.
  • Which software release matters before staging IE-3105-18T2C-E?

    IE-3105-18T2C-E is listed with support from Cisco IOS XE 17.15.1 onward, so staging verifies the image before shipment to the site.
  • What transceiver question applies to IE-3105-18T2C-E?

    A Cisco Community IE3100 optics thread asks about alternate transceiver brands, so IE-3105-18T2C-E buyers check Cisco compatibility and industrial temperature needs.
  • Why might buyers search for IE-3105-18T2C-E distributors?

    Reddit posts asking for IE3100/IE3105 sourcing show that availability can drive procurement timing, so IE-3105-18T2C-E projects need lead-time checks.
  • When is IE-3105-18T2C-E the wrong SKU?

    IE-3105-18T2C-E is the wrong SKU when the cabinet needs PoE, 1G SFP-only uplinks, or fewer ports in a smaller footprint.

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  • IE-3105-18T2C-E Datasheet