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These inexpensive, unmanaged Layer 2 media converters easily enable you to extend your 10- or 100Mbps network over 100Mbps fiber optic cable over distances up to 40 kilometers. In addition it adds four ports at the edge of your network.

The converter features an industrial-strength plastic case and complies with IEC 61000-Part 6-2 generic standards for electromagnetic compatibility (EMC) in industrial environments. It offers full wire-speed forwarding rates across the network.
Auto MDI/MDI-X copper port auto-negotiates for 10/100Mbps speed and auto detects full-or half-duplex mode.

The converters can be installed easily on a DIN rail. The mounting kit is included.


Key specifications

Number of ports5
Max. port speed100 Mbit/s

General information

Manufacturer Black Box
Product type Network switches

Network switches

A network switch or switching hub is a computer networking device that connects network segments.
The term commonly refers to a network bridge that processes and routes data at the data link layer (layer 2) of the OSI model. Switches that additionally process data at the network layer (layer 3 and above) are often referred to as Layer 3 switches or multilayer switches.
The term network switch does not generally encompass unintelligent or passive network devices such as hubs and repeaters.
The first Ethernet switch was introduced by Kalpana in 1990.

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Item number6183891
Manufacturer no.LBH120A-H-20K-SC
External links Manufacturer's site (de)


Case colour

Network switch properties


Network switch properties

A network switch is a computer networking device that links network segments or network devices. The term commonly refers to a multi-port network bridge that processes and routes data at the data link layer (layer 2) of the OSI model.

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Switch model


A desktop case is made to use on top of the desk and not under it like a midi tower.

Number of ports
Max. port speed

Max. port speed

Describes the maximum data transfer rate. Is not necessarily supported by all ports.

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100 Mbit/s

100 Mbit/s

In computer networking, Fast Ethernet is a collective term for a number of Ethernet standards that carry traffic at the nominal rate of 100 Mbit/s, against the original Ethernet speed of 10 Mbit/s.

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Switching capacity
1 Gbit/s

Network connections

RJ45/LAN port
4 x
Max. port speed RJ45
100 Mbit/s

Product dimensions


Product dimensions

Physical size of an object

71 mm
25 mm
109 mm


Application range

Application range

Describes the application range the device can be used for.

Home use
Professional use

Professional use

A professional is a member of a vocation founded upon specialised educational training.

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Technical data sheet | 194.71 KB | English

Returns and warranty

Warranty 24 month Bring-in
30-day right of return

30-day right of return

This product may be returned within 30 days after shipment or collection. A minimum of 10% will be deducted from opened products. Unfortunately, we cannot accept a product if it is damaged, incomplete or missing its original packaging.

Returns and warranty

Please use our simplified returns and warranty process to return a product or register a warranty case. Returns and warranty

Please use our simplified warranty process to view the warranty period as well as any warranty extensions you may have purchased. This will ensure that your return or warranty case is processed quickly and effectively.

Warranty services

Warranty upgrade to premium express service

Warranty upgrade to premium express service

The device will be replaced, repaired or refunded within 24 hours.

to 2 years CHF 41.30
to 3 years CHF 73.- *
to 5 years CHF 83.80 *

* incl. Extension of the warranty
The warranty will be extended for the respective period of time

to 3 years CHF 30.-
to 5 years CHF 34.90

More information about warranty services


Mail delivery/Collection

 Currently unavailable. Delivery date unknown.
We do not have any information regarding the delivery date. It will be shown as soon as it's known.

Information subject to change.

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Black Box LBH120A-H-20K Black Box LBH120A-H-20K