FEATURES AND SPECIFICATIONS
SPECIFICATIONS
Reference Information
Packaging: PolyBag with test data
Mates With: MPO or MTP adapter (Series 106181 and
106114) with a male mating connector interface
and any parallel optical device that uses an
MTP/MPO interface
Use With: Any Molex MTP adapter (Series 106181 and
106114) and other manufacturers’ optical
devices
Designed In: Millimeters
Optical
Insertion Loss:
Single mode: .5dB per fiber
Multimode: .75 dB per fiber
Mechanical
Connector Insertion Force: 10N (2.250 lbf) typical
QSFP fiber-count compliant on part number
106005-1100 4TX, 4RX with 12 channel ferrule
Physical
Housing: PEI, UL94-V0
Connector: Female MPO interface 8 or 12 fiber
Operating Temperature: -5 to +40°C
Rear Housing:
Height: 6.80mm (.268”)
Length: 35.60mm (1.402”)
Width: 20.00mm (.787”)
n Small, compact housing design allows side-by-side
mounting in dense board applications
n Ruggedized enclosed body for easy removal
protects the ribbon fibers when engaged repeatedly
n Available in attenuated versions for multimode
applications offers the ability to simulate network
distances within the device
n Offering pinouts for 8-and 12-fiber MT ferrules or
QSFP transceivers provides a Loopback with pinouts
that is factory ready to mate to components with
appropriate routing
n Identification labels that provide data on return
loss, mode (single or multi) and fiber type provides
quick customer identification of device parameters
for evaluation
Features and Benefits
Loopbacks for MT interconnect applications are driven
by both network systems-solutions providers and
the optical-device community that design and make
transceivers or active components. Loopbacks are used
primarily as a means to test optical links in networks or
devices by “looping back” the connections from the TX
(transmit) pairs to the RX (receive) pairs. By doing this,
a complete optical link is formed, allowing the optical
performance evaluation of a discrete component or a
complete link in a network path covering one or more
interfaces.
Molex’s Loopback offers a female MTP-connector
end that mates to any MPO or MTP adapter or
device port. The Loopback also can be mated directly
to a parallel optical device such as a Quad Small
Form-factor Pluggable (QSFP) transceiver with a
4-lane configuration. For multimode applications, an
attenuated version of the MPO Loopback is available
to simulate longer links in a network, with up to 5dB
attenuation. With standard or custom pinouts available
for 8- to 12-fiber MT ferrules, the Loopback can
accommodate specific optical-routing needs. The
small and compact housing design allows side-by-side
mounting in dense board applications and tight spaces.
This design makes it ideal for blades with multiple
optical components on a face plate.
For burn-in and testing of MPO network components,
Molex’s MPO loopback offers a stable and compact
solution for telecom and datacom requirements.
Molex also offers a LC loopback (Series 106052) and
will soon release a CXP loopback assembly. For more
information on Molex’s loopback offerings, visit:
www.molex.com/link/loopbacks.html.
For compact testing of QSFP optical transceivers or network optical links, Molex’s MPO Loopback
Assemblies offer a new, robust solution for Telecom and Datacom applications
MPO Fiber Optic
Loopback Assemblies
106005 Multi-Fiber
Loopback Assemblies
