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Compact metal industrial switch with four RJ-45 ports and two fiber ports, DIN rail clips and wall-mount ears visible

PLANET

PLANET ISW-621T 4+2 port 10/100 industrial network switch 2 km multi-mode -40 to 75 °C

SKU CH-4DGE-EYTBT MPN ISW-621T

Unmanaged industrial switch with four RJ-45 ports and two multi-mode fibre ports reaching 2 km, operating from -40 to 75 °C on redundant 12–48 V DC power

  • FormatDIN Rail Kit and Wall Mount Ear
  • StandardsIEEE 802.3 Ethernet, 10Base-T IEEE 802.3u Fast Ethernet, 100
  • Network Management TypeUnmanaged
  • Primary Ports4 x port 10/100Base-TX RJ-45 with auto MDI / MDI-X function
  • Primary Port Speed10/100Mbps
  • MAC Address Table2K
  • Operates reliably from -40 to 75 °C for harsh industrial sites
  • 2 km multi-mode fibre links extend networks beyond copper limits
  • Redundant 12-48 V DC input with reverse polarity protection prevents downtime
  • Compact DIN-rail or wall-mount design fits tight cabinets
  • Unmanaged store-and-forward switching with 2K MAC table simplifies deployment

Industrial 4+2 port switch with multi-mode fiber

The PLANET ISW-621T is an unmanaged industrial Ethernet switch built for harsh environments. It provides four 10/100Base-TX RJ-45 ports and two 100Base-FX multi-mode fiber ports supporting distances up to 2 km. The unit operates from -40 to 75 °C and mounts on DIN rail or wall brackets.

Check power and fiber compatibility before ordering

The switch requires a 12 to 48 V DC supply and includes redundant inputs with polarity reverse protection. Verify your fiber patch cables match 50/125 µm or 62.5/125 µm multi-mode specifications and 1310 nm wavelength. Ensure the 1.26" x 5.31" x 3.82" enclosure fits your cabinet space.

Suits integrators needing rugged unmanaged

This model fits automation, transportation and outdoor surveillance networks that demand wide temperature range and fiber uplinks. It is not for buyers who need managed features such as VLANs, QoS or remote monitoring. Teams requiring gigabit copper speeds or single-mode fiber reach beyond 2 km should look elsewhere.

Highlights

  • Operates reliably from -40 to 75 °C for harsh industrial sites
  • 2 km multi-mode fibre links extend networks beyond copper limits
  • Redundant 12-48 V DC input with reverse polarity protection prevents downtime
  • Compact DIN-rail or wall-mount design fits tight cabinets
  • Unmanaged store-and-forward switching with 2K MAC table simplifies deployment

Specifications

BrandPLANET
ModelISW-621T
FormatDIN Rail Kit and Wall Mount Ear
StandardsIEEE 802.3 Ethernet, 10Base-T
IEEE 802.3u Fast Ethernet, 100Base-TX, 100Base-FX
IEEE 802.3x Full-duplex flow control
Network Management TypeUnmanaged
Primary Ports4 x port 10/100Base-TX RJ-45 with auto MDI / MDI-X function for ISW-621T series
2 x port 100Base-FX interface on ISW-621T for up to 2km (multi-mode fiber 62.5/125µm, 50/125µm) transmission distance
Primary Port Speed10/100Mbps
MAC Address Table2K
Switching MethodStore and Forward
Buffer Memory1MB
PowerPower Requirements:
12 ~ 48V DC
Redundant power with polarity reverse protection function
Power Consumption / Dissipation: Max. 16 watts / 54 BTU
FeaturesCable: 50/125µm / 62.5/125µm fiber
Mode: Multi-mode
Distance: 2 km
Frequency: 1310 nm
Launch Power: Max. -14 dBm, Min. -20 dBm
Receive Sensitivity: -32 dBm
Max. Input Power: -14 dBm
Dimensions1.26" x 5.31" x 3.82"
Weight0.97 lb.
TemperatureOperating Temperature: -40 ~ 75 degree Celsius
Storage Temperature: -40 ~ 85 degree Celsius
HumidityOperating Humidity: 5% ~ 90%
Storage Humidity: 5% ~ 90% non-condensing
Shipping weight0.44 kg
Package size136 × 98 × 32 mm

Questions about this item

Does the switch ship with fibre patch cables or SFP modules, or must they be purchased separately?

The unit includes the switch with DIN rail kit and wall-mount ears. Multi-mode fibre patch cables (50/125 µm or 62.5/125 µm) and 100Base-FX SFP modules are not included and must be sourced separately.

How do I decide between 50/125 µm and 62.5/125 µm multi-mode fibre for the 2 km links?

Both core sizes are supported at the 1310 nm wavelength for distances up to 2 km. Choose the cable type that matches your existing plant cabling; 50/125 µm generally offers higher bandwidth headroom, while 62.5/125 µm is common in legacy installations.

What does the 2 km multi-mode distance mean when the switch is mounted in a cabinet at 75 °C?

The 2 km figure is the optical link budget for 100Base-FX over multi-mode fibre at 1310 nm. The switch operates from -40 °C to 75 °C without derating, so the full 2 km reach is maintained across the entire industrial temperature range.

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