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new products
has launched two new high density PCB-mounting
SMA (H22) style housings for its wide range of fibre
optic transmitters and receivers which save board
space and ensure long-term performance.
The company has released two new space-saving
housing styles: High Density SMA (HDSMA) which
is designed to be edge-to-edge stackable while
offering enhanced board density, and Vertical SMA
(VSMA) which offers an even smaller PCB footprint for
applications where devices are used singly on a PCB.
The new high-density HDSMA housing has PCB
footprint of 10mm x 7mm, offering a potential increase
in device density over the traditional SMA (H22)
PCB mount housing of between 22 and 50 percent
depending on the amount of board edge available. The
package is designed for systems requiring multiple Tx/
Rx channels per PCB and features an all-metal, bolt-
down design. OMC’s full range of fibre-optic emitter and
receiver diodes can be supplied aligned and mounted
in the new HDSMA receptacle.
The company’s new Vertical SMA (VSMA) package has
a PCB footprint of only 8mm x 7mm which OMC believe
makes it the world’s smallest PCB footprint SMA fibre-optic
housing. With a modern, slimline design and all-metal
body, the VSMA device bolts in place with a single screw
and features a locating lip which slots into a groove in the
PCB edge to securely fix the device in place. The VSMA
package is designed to allow a fibre-optic transmitter
or receiver to be incorporated into a PCB design while
occupying the minimum possible PCB space. It is available
with a wide range of visible and infrared emitters and fibre-
optic receivers aligned and mounted within.
The new housings still permit the use of a standard
SMA connector with secure hexagonal locking nut.
Both have been designed to meet the demand for
space-saving fibre-optic devices in the modern age of
miniaturisation in which PCB area is at a premium.
Explains OMC’s Commercial Director, William Heath:
“The VSMA device takes up minimum possible space
if a designer is incorporating single devices onto their
PCB, while the HDSMA edge-stacking receptacle
allows many more devices to fit into the same amount of
space where multiple channels are required. For example,
in 100mm of board edge a designer can fit 10 HDSMA
receptacles whereas with the traditional PCB mount SMA
package they would be restricted to 7 devices.”
“SMA is a secure connector system, as once the
connector nut is tightened the fibre is locked in place
- unlike, for example, sprung connectors whereby
even when the connection is made any tension on
the cable will allow the fibre to move and change the
attenuation of the link, as you create an air gap. Our
new packages retain all the benefits of a traditional
SMA (H22 style) housing, such as its rugged, all-metal
design and secure bolt fixing to the PCB, but enables
designers to reduce the size of their designs, saving
cost and offering an environmental advantage – or to
include extra channels in the same space for added
functionality, while ensuring secure and reliable long-
term performance.”
The new packages suit industrial applications where
a fit-and-forget approach is desired or in applications
subject to high vibration, and as with their standard
SMA connector, a small hex spanner is used to gently
tighten the lock nut after installation. As well as securing
the link, this reduces the likelihood of casual tampering
or unintentional demating.
Earlier this year, OMC expanded into a new purpose-
built manufacturing facility specifically designed
and constructed by the company to suit its complex
production and testing requirements. The new factory
has dedicated development andassembly departments,
as well as specialist test areas and a machine shop
capable of both prototyping and mass component
production. As part of this expansion, the company has
invested in brand new, state-of-the-art CNC machining
capabilities to facilitate the cost-effective manufacture
their new range of advanced fibre optic connector
systems and components.
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