Hirschmann BRS20-16009999-TTDY99HHSESXX.X.XX: BRS20-16TX-EEC Guide to Wide-Temperature Copper Switching and Metal-Housing Installation
Hirschmann BRS20-16009999-TTDY99HHSESXX.X.XX corresponds to BRS20-16TX-EEC, part number 942170054. This managed BOBCAT Fast Ethernet switch combines sixteen RJ45 copper ports with a metal enclosure and a -40 to +70 °C operating range. It is a fanless DIN rail configuration for projects that need to match both the network layout and the physical conditions inside the cabinet.

Reference photograph: shared Hirschmann stock image. The photographed unit may show a different model; this image does not establish the configuration or availability of Hirschmann BRS20-16009999-TTDY99HHSESXX.X.XX.
Ordering and electrical reference
| Brand / series | Hirschmann / BOBCAT |
| Type | BRS20-16TX-EEC |
| Product code | BRS20-16009999-TTDY99HHSESXX.X.XX |
| Part number | 942170054 |
| Network connections | 16 × 10/100BASE-TX RJ45 |
| Mounting | DIN rail |
| Power supply | 2 × 12–24 V DC |
| Power consumption | 10 W |
| Operating temperature | -40 to +70 °C |
| Housing | Metal |
| Protection class | IP30 |
| Dimensions (W × H × D) | 123 mm × 140 mm × 115 mm |
| Weight | 1450 g |
A metal enclosure with measurable mounting requirements
The listed dimensions are 123 × 140 × 115 mm and the weight is 1450 g. Confirm the available DIN rail width and mechanical support before selecting the unit as a spare for another BRS20 model. IP30 protection also means that the surrounding installation must provide any further protection needed against moisture, dust or accidental contact.
Sixteen Fast Ethernet ports and the copper-link limit
Each network connection is 10/100BASE-TX through RJ45. The catalog states a 0–100 m twisted-pair segment range and allows line or star arrangements. Account for upstream connections and future equipment in the sixteen-port schedule. This is not a fiber-port version; where a link must use optical cable, the interface requirement needs to be resolved before ordering.
Temperature, control power and managed operation
The two supply inputs are specified for 12–24 V DC and consumption is listed at 10 W. Verify the cabinet supply and the thermal conditions at the actual mounting location. Industrial profiles include EtherNet/IP, PROFINET, Modbus TCP and IEC 61850 MMS server / switch-model functions. Firmware, configuration and the functions used by the plant should be checked together when a replacement is commissioned.
Check the offer against the installation
For an HKXY inquiry, provide BRS20-16TX-EEC, the full product code and part number 942170054. Include the quantity, cabinet temperature range, network-port requirement and a clear label photo. If dimensional interchangeability or specific documentation is essential, state it in the RFQ for confirmation with the proposed supply.
Technical source: Belden catalog for Hirschmann BRS20-16TX-EEC.