Hirschmann BRS20-08009999-TTCY99HHSESXX.X.XX BRS20-8TX-EEC: Copper Port Planning and Cabinet Temperature Checks for BOBCAT Installations
The distinguishing environmental specification of Hirschmann BRS20-08009999-TTCY99HHSESXX.X.XX is its -40 to +70 °C operating range. The Hirschmann BRS20-8TX-EEC, part 942170012, combines that range with eight 10/100BASE-TX RJ45 ports in a fanless DIN rail format. It is a useful configuration to evaluate when the required internal cabinet temperature lies outside the standard-temperature BRS20-8TX specification.
Start with the temperature at the device
Use the enclosure temperature near the switch rather than the ambient weather report when selecting this version. Adjacent power equipment and sunlight on a cabinet can change that local condition. Extended operating temperature does not remove the need to review ventilation, installation clearances, condensation control or the suitability of the enclosure itself.

Reference photograph: shared Hirschmann product image. The photographed unit may be a different model; this image does not establish the configuration or availability of Hirschmann BRS20-08009999-TTCY99HHSESXX.X.XX.
Electrical and mechanical selection data
| Brand / series | Hirschmann / BOBCAT |
| Type | BRS20-8TX-EEC |
| Product code | BRS20-08009999-TTCY99HHSESXX.X.XX |
| Part number | 942170012 |
| Ports | 8 × 10/100BASE-TX RJ45 |
| Operating temperature | -40 to +70 °C |
| Supply inputs | 2 × 12–24 V DC |
| Power consumption | 6 W |
| Mounting | DIN Rail |
| Dimensions (W × H × D) | 73 mm × 138 mm × 115 mm |
| Housing / protection | PC-ABS / IP30 |
| Weight | 500 g |
Eight ports still need a port schedule
This is an all-copper Fast Ethernet arrangement, with no fiber port shown in the specified configuration. Reserve a connection for the upstream network and assign the remaining interfaces to local equipment. The source specifies a 0–100 m twisted-pair segment reference. Where a route calls for fiber or another speed, select the appropriate interface arrangement instead of assuming this model provides it.
Prepare the cabinet wiring review
Power consumption is listed as 6 W, with two 12–24 V DC inputs. Confirm terminal assignments and protective measures against the installation documentation. The IP30 PC-ABS housing is a device-level enclosure specification; it should not be read as a claim that an exposed outdoor installation is acceptable.
Information for your HKXY enquiry
An HKXY enquiry for BRS20-8TX-EEC should identify BRS20-08009999-TTCY99HHSESXX.X.XX, part 942170012, quantity and the cabinet temperature requirement. Add replacement-label details and preferred delivery date so the quotation can distinguish this EEC configuration from the standard-temperature alternative.
Technical reference: Belden catalog for Hirschmann BRS20-8TX-EEC.