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Compact metal network switch with four RJ45 ports and two SFP slots

PLANET

PLANET ISW-621TF 4-port 10/100Base-TX + 2-port 100Base-FX SFP network switch

SKU CH-HMS7-XSAYN MPN ISW-621TF

Industrial Ethernet switch with four copper ports and two SFP fibre slots for extended distance links, operating from -30 to 75 °C in an IP30 metal enclosure

  • Supported standardsIEEE 802.3 Ethernet, 10Base-T IEEE 802.3u Fast Ethernet, 100
  • Main ports4-port 10/100Base-TX RJ-45 with auto MDI/MDI-X function 2-po
  • MAC table size2K
  • Switching modeStore and Forward
  • Buffer size1 MB
  • Power detailsRequirements: 12 to 48 V DC, Redundant power with polarity r
  • Wide-temperature reliability from -40 to 75 °C
  • Flexible fibre reach up to 60 km via SFP
  • Space-saving DIN-rail or wall-mount IP30 metal case
  • Redundant 12–48 V DC input with reverse-polarity protection
  • 2 Gbps switching fabric handles six ports wire-speed

Industrial Ethernet Switch

The PLANET ISW-621TF is an industrial-grade network switch built for harsh environments. It combines four 10/100Base-TX RJ-45 ports with two 100Base-FX SFP slots for fiber uplinks. A rugged metal case rated IP30 withstands wide temperatures and electromagnetic interference. The unit mounts on DIN rail or wall for flexible cabinet installation.

Suited for Factory and Outdoor Networks

This switch fits transportation, manufacturing, and surveillance systems needing reliable copper and fiber links over extended distances. It operates from -30 to 75 degrees Celsius with redundant 12-48V DC power inputs. Installations requiring Gigabit speeds, Power over Ethernet, or managed Layer 2 features will not be served by this model.

100 Mbps Fiber Uplink Speed

The two SFP ports accept 100Base-FX transceivers only, limiting fiber links to 100 Mbps. Multi-mode fiber reaches 550 meters while single-mode fiber extends beyond 60 kilometers. If your backbone requires 1 Gbps or 10 Gbps fiber interfaces, this switch cannot meet that requirement.

How it compares

Measured against everything we stock in Ethernet & PoE Switches, at today’s prices. Recalculated every night.

Price $73.99
Cheaper than about 84% of the 2,759 comparable items (median $482.99).

Specifications

Product
Brand namePLANET
Model nameISW-621TF
Memory
Buffer size1 MB
Connectivity
Supported standardsIEEE 802.3 Ethernet, 10Base-T
IEEE 802.3u Fast Ethernet, 100Base-TX, 100Base-FX
IEEE 802.3x Flow Control
MAC table size2K
Switching modeStore and Forward
Ports & slots
Main ports4-port 10/100Base-TX RJ-45 with auto MDI/MDI-X function
2-port 100Base-FX SFP interface
Power
Power detailsRequirements: 12 to 48 V DC,
Redundant power with polarity reverse protection
Power Consumption / Dissipation: Max. 16 W / 54 BTU
Size & build
Product dimensions1.26 in × 5.31 in × 3.82 in
Product weight0.97 lb (0.44 kg)
Shipping weight0.44 kg
Package size136 × 98 × 32 mm
Environment & compliance
Temperature rangeOperating Temperature: -30 to 75 degree Celsius
Storage Temperature: -40 to 85 degree Celsius
Humidity rangeOperating Humidity: 5% ~ 90% non-condensing
Storage Humidity: 5% ~ 90% non-condensing

Questions about this item

Does the ISW-621TF come with SFP modules or must they be purchased separately?

The switch includes four RJ-45 ports and two empty 100Base-FX SFP slots; compatible SFP transceivers are sold separately and must match the required fibre type and distance.

Which SFP module should I choose for a 60 km single-mode fibre link?

Select a 100Base-FX single-mode SFP rated for at least 60 kilometres; the switch provides two SFP slots that accept standard 100 Mbps SFP transceivers.

What does the 1.2 Gbps backplane figure mean for real-world throughput?

The 1.2 Gbps switching fabric is the total internal bandwidth shared across all six ports, so simultaneous full-duplex traffic on every port will not exceed this aggregate limit.

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