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SEH M03942 SFP transceiver with RJ-45 and duplex SC ports

SEH Technology, Inc.

SEH Technology, Inc. M03942 SFP transceiver 1000Base-SX 10/100/1000Base-T

SKU CH-AP4F-Q1QY2 MPN M03942

A dual-port fiber adapter with one RJ-45 and one SC duplex interface for multi-mode Gigabit Ethernet links

  • Dual media support with one RJ-45 and one SC duplex port
  • Gigabit Ethernet over multi-mode fiber via 1000Base-SX standard
  • Compact internal form factor measuring 1.4 by 2 by 2.3 inches
  • Lightweight module at 4.90 ounces for easy installation
  • Copper and fiber connectivity in a single transceiver package

Dual-media Gigabit transceiver

The SEH M03942 is an internal SFP module that bridges one multi-mode SC duplex fiber link and one copper RJ-45 connection. It serves integrators who need to extend a Gigabit Ethernet segment across both media types in a single slot.

Multi-mode reach limit

Multi-mode fiber supports 1000Base-SX up to the standard distance ceiling for the chosen core size; beyond that the link will not establish. The copper port negotiates 10, 100 or 1000 Mb/s over twisted pair but cannot exceed the 100 m channel limit defined for the category cable in use.

Two-port capacity envelope

One SC duplex port plus one RJ-45 port gives exactly two simultaneous Gigabit paths — no more, no less. The module draws minimal power and fits the stated 1.4 by 2 by 2.3 inch footprint, so it suits dense chassis where only a single internal transceiver slot is available.

How it compares

Measured against everything we stock in SFP & SFP+ Transceiver Modules, at today’s prices. Recalculated every night.

Price $300.99
Pricier than about 71% of the 1,471 comparable items (median $138.99).

Specifications

Size & build
Shipping weight0.32 kg
Package size254 × 165 × 51 mm

Questions about this item

Should I choose the 1000Base-SX or the 10/100/1000Base-T version?

This single module provides both interfaces. One SC duplex port handles multi-mode fibre at 1000Base-SX, while one RJ-45 port handles twisted-pair at 10, 100 or 1000 Mbps.

What does the Gigabit Ethernet rating mean when the transceiver is installed?

Each port negotiates up to 1000 Mbps full-duplex. The fibre link runs 1000Base-SX over multi-mode cable, and the copper link runs 10/100/1000Base-T over standard twisted pair.

How does the internal form factor and SC duplex interface limit the connection?

The unit fits an internal slot measuring 1.4 by 2 by 2.3 inches. Its single SC duplex port accepts multi-mode fibre only, capping the optical link to 1000Base-SX distances.

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