Author Archives: Industrial Coaxial Connectors

Discover today what our MultiContact B-SMP modules are like. We tell you how they are classified and what are the characteristics of ours, which we design and manufacture at Alfa´R.

Classification of the MultiContact B-SMP modules

The B-SMP MultiContact modules are classified according to the nature of their contacts and are divided as follows.


Mixed, male or female, all three possibilities can be given in the same monoblock.
Its contact section is given according to how many elements there are in each monoblock and can go from 2 to 16 through 3, 5, 8 and 10.
Its nominal current may be 7.5 amps, reaching even 25 amps, for each contact.
They have pins for crimping cable or for welding.


These modules are available in blocks with 2 connectors, male or female.
Its impedance will be 50 or 75 Omhios.
In the module, the connectors can be assembled and disassembled as required, requiring the use of an extraction tool.
They offer compatibility with D sub-coax connectors.

Compressed air and vacuum

These modules go in blocks of two connectors. These are female, male or combined.
Tube diameter 4 is used.

Fiber optics

The blocks can have 2, 3, 5, 10 and 16 connectors.

B-SMP MultiContact Modules from Alfa´R

B-SMP MultiContact Modules from Alfa´R

Let’s also see the features of the B-SMP MultiContact modules that we manufacture here at Alfa´R, and that will therefore be included in any of the modular B-SMP products that you want us to design for you.

At Alfa´R our B-SMP MultiContact modules are made of a thermoset material capable of withstanding temperatures in the range of -40 to 120ºC. The exception to this is the 8 thermoplastic contacts, which work at colder temperatures, from -55º to 90º. The central electrical contact is made of brass and is gold-plated.

The female ones include safety springs and can be fitted, if desired, with the new TSS system, which offers half a million connection and disconnection cycles, ensuring unprecedented durability.

These are products with high impact resistance.

We have stacking compatibility for those versions that have 2, 3, 5 and 8 elements, because their length is the same, 3 cm.

These are used on MC connectors for RACKS and rectangular MC connectors.

The other two, 10 and 16 cm, can only be stacked with other elements of similar length, 5 and 7.4 cm respectively.

Each of the monoblocks has a fixing hole, either for plate or panel, as well as a centring device to help you align them.

Classification of the MultiContact B-SMP modules

In essence, this is what our MultiContact B-SMP modules are like. As you can see, these are products of the highest quality with which the possibilities are maximum. Their quality is unbeatable and, of course, they are guaranteed by Alfa´R.

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In the industrial sector, it is interesting to know the ODU – Alfa’r compatible connectors. The world of telecommunication and engineering is changing at a dizzying pace, so it is important to adapt to new market needs.

ODU connectors have a wide range of application areas and are therefore widely used in today’s industrial sector, which is why they are so popular.

ODU Connectors

The range of solutions offered by ODU is very wide, which is a big plus. This, combined with the high quality and precision of the contact itself, makes this product the highest rating range for customers. Thus, the ODU product range includes the following types of connectors.

On the one hand, the circular connectors, one of the most popular and common of all thanks to the wide range of advantages they provide.
On the other hand, the rectangular connectors, which cover a large number of needs and offer excellent quality and connectivity.
In addition, power and PCB connectors.
And finally, the connectors known as “Custom Solution”.

Connectors for military applications AMC

These, when talking about ODU connectors, are always worth noting.

Connectors that have been specifically designed for AMC military applications are matt in color and are very small in design and size. They are also very light in relation to their weight, which is a great advantage in this area thanks to the aluminium housing.

They are connectors for both indoor and outdoor use, as they are IP68/IP69K certified for both water and dust protection. They offer excellent EMI properties as well as the possibility of overmolded wiring.

This type of connector is also available in a watertight connector version. They comply with a large selection of Mil Standards:

  • MIL-STD-810F 5811.4/
  • MIL-STD-810F 510.4/5 Procedure I / II
  • MIL-STD-1344A Method 1002.2 Type III
  • STANAG 4370
  • MIL-STD-810F 500.4/5
  • MIL-STD-810F 509.4/5
  • MIL-STD 1344 Method 2005
  • MIL-STD 1344 Method 2004


Connectors for military applications AMC

The applications in the military field of this type of connector are very wide. On the one hand, remote-controlled radios. On the other hand, night vision systems, which are widely used in this sector. In addition, the connectors are used extensively in navigation and control systems. Also in personal computers of different types. And, of course, GPS antennas.

It is interesting to know the relationship and areas of activity of ODU connectors in today’s market and society. Specialisation is a key and differentiating factor in 21st century companies, so it is important to keep abreast of the progress made in the different sectors and fields of application.

ODU connectors perform important functions, providing outstanding quality and a wide range of ranges.

Compatibility of Alfa’r connectors

At Alfa’r, of course, we have our own ODU-compatible connectors in our extensive catalogue of connection solutions.

This means that you can purchase, as you always have, your connectors from us, with the certainty that they will have the same use as the ODUs, but with the guarantee and customization of our service, designed to meet the specific needs of your project.

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The B-SME and B-SCT series rectangular multicontact connectors are two of the most widely used models today. Below we indicate what are its features and the different types of products available on the market.

Rectangular multicontact connector B-SME

Rectangular multicontact connectors B-SME and B-SCT series: characteristics and types

The B-SME and B-SCT series rectangular multicontact connectors are based on exactly the same principle as the B-SMF series rack connectors. However, there are differences between the two. On the one hand, the B-SME and B-SCT series rectangular multi-contact connectors are mounted in very robust aluminium housings, which guarantee high strength due in part to the clamping closure.

And, on the other hand, 2, 3, 5 and 8-pin modules can be stacked. As far as stacking is concerned, the modules are inserted in the appropriate frame. In this way, they are stacked safely and, above all, robust and resistant, thus guaranteeing a long service life. One of the main advantages they offer is that they can be configured according to the specific needs of each customer.

There are two different connector sizes: 35.75 mm and 82.5 mm connecting surface, which correspond to 13 umb and 30 umb respectively.

Types of contacts

There are different types of contacts, depending on the nature of the contacts located in them.

Electrical: In this case, they can be elements, male, female, or a mixture of both, in the same monoblock. The section of the contacts is defined according to the number of elements included in each of the monoblocks; they can be 2, 3, 5, 8 with a nominal current per contact of 7.5 A to 25 A.

Coaxial: Those contacts that are supplied in blocks of a total of two connectors, which can be male or female, and of 50 Ω or 75 Ω are known as such. The connectors can be assembled and disassembled relatively easily inside the monoblock module using the extraction tool.

Fiber optics: The connectors are supplied in blocks of 2, 3 and 5 devices.

Compressed air and vacuum: And finally, these connectors are presented in blocks of 2. They can be male, female or a mixture of the two, for tubes of 4 in diameter.



The modules of the rectangular multicontact connectors are made of a thermoset material, so that they are able to withstand extreme temperatures without any problem; between -40ºC and +120ºC. The only exception is the 8-pin module, which is manufactured in thermoplastic, so that its range is noticeably smaller; it can withstand temperatures between -55ºC and +90ºC. In both cases, the impact resistance is very high. One of the main features is that the central electrical contacts are made of gold-plated brass.

Combitech connector example

Regarding the manufacturing system of the B-SME and B-SCT series rectangular multi-contact connectors, it is very wide and includes a large selection of processes and systems; in addition to the two existing sizes, it includes paper passes, as well as straight and angled ones, which can be short or long. For more information, please do not hesitate to contact us.


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There are many types of cable most common in the industry. Each of them offers a series of features and characteristics that make it extraordinary for a specific sector and application. Today we’re going to see the most used ones.

What are the most common cables in the industry?

PVC Cable

PVC sheathed cables are specifically designed for use in areas where they will be subjected to moderate mechanical fatigue. They are widely used in the food industry. They offer very good resistance to chemical and toxic products, which is a great advantage in this sector.

PVC Cable

PUR Cable

PUR-insulated cables offer long-lasting flexibility, which is essential to ensure long cable life on machine tools. They have very high mechanical, chemical and oil resistance. Thus, they are one of the best alternatives in the cable market in the vast majority of industrial applications, such as assembly or production lines, for example.

PUR Cable

PUR A Cable

PUR A sheathed cables are a very good alternative to irradiated PUR cables. They have a very good mechanical resistance, as well as to chemical agents and oils; they are also flame retardant and even resistant to welding sparks. These features make them the best cables for numerous processes and machines in the automotive industry. They are also very easy to recycle.

PUR A Cable

PUR U Cable

A cable specially designed for drag chains and rotary indexing tables, particularly harsh industrial conditions for which these PUR U-sheathed cables offer a perfect solution. In addition to having extraordinary mechanical and oil resistance, this type of cable is fire resistant.

PUR U Cable


Stoow is a PVC compound specially designed and developed to withstand the most demanding conditions in the industry. It offers heavy gauge drivers and a very durable exterior coating, perfect for the automotive industry. It is resistant to chemical agents and oils; it is also approved for voltages up to 600V.


POC Cable

POC coated cables are the best choice in those industries where they must be exposed to welding sparks on a regular basis. They have an extraordinary mechanical resistance, as well as a thermal resistance of 150ºC of continuous operation temperature. These cables are even capable of withstanding hot weld slag. They are commonly used in the automotive and metallurgical industries.

POC Cable

PUR OD Cable

PUR OD cables are one of the strongest. One of the main advantages they offer is that they can be used in a very wide temperature range, between -5’ºC and 105ºC; that is why they are the most commonly used in outdoor applications. In addition, they are resistant to UV rays from the sun, sea water, oil, and diesel. They also offer high mechanical and fire resistance. They are commonly used in the field of mobile equipment.

PUR OD Cable

These are the most common types of cable in the industry. Each of them has its own characteristics and advantages, and are intended for companies in a particular sector depending on them; which one do you need?

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Alfar SL is a manufacturer of RF coaxial connectors for professional telecommunications: UHF, F, BNC, TNC and N series. With a long history in the market and a great experience in the industrial sector, quality is one of our main indicators. We are dedicated to industrial connectors, an activity in which we have been working since 1965, always providing the best quality service to our customers and receiving maximum satisfaction from them.

How are we as manufacturers of RF coaxial connectors for professional telecommunications: UHF, F, BNC, TNC and N series?

We take care of the entire production process of our connectors. We are strongly committed to innovation in order to offer our customers the best solutions on the market, solutions that are inimitable to others. We are talking about products that are precisely adapted to the needs of 21st century telecommunications companies.

various coaxials connectors

UHF, F, BNC, TNC and N connectors

We have a large selection of coaxial connectors such as the Microcoax Series MCX, MMCX, SMA, SMB, SMC… Also a selection of MIL standard and DIN standard series. Of course, a selection of reverse polarity and various adapters between series.

UHF Connectors

Also known as Amphenol, it was a coaxial video connector widely used in radar applications during World War II. Nowadays, it is generally used to work with VHF and HF frequencies. It has also become one of the most common connectors in amateur radio applications up to 150 MHz.


F Connectors

They are coaxial radio-frequency connectors used mainly in terrestrial aerial, cable and satellite televisions. These connectors were invented in the 1950s. Later, in the 1970s, they became standard devices for VHF antenna television connections.

F connector

BNC Connectors

They stand for Bayonet Neill-Concelman. This is a male connector that is installed on both ends of the cable. It is mostly used in video connections and Ethernet networks.

bnc connector

TNC connectors

With threaded coupling, they become stable and reliable. This makes your application perfect where there is vibration. They work at 50 and 75 ohms and can be interconnected. We have TNC connectors that vary in shape and mounting.

tnc connector

Connectors N

It’s the well-known Navy. They are versatile, robust and special for demanding applications. The effective frequencies range from 11 GHz to 1.5 GHz.  What we get is very low VSWR and somewhat high powers, which leads to 200 W.

N connector

Quality, our greatest strength

Working with quality materials in the industrial sector is of great importance, since the result of the final product depends to a large extent on it. That is why it is so advisable to rely on reliable suppliers such as our company, which guarantee connectors manufactured with the best materials on the market and that meet the current needs of telecommunications companies.

If you are looking for manufacturers of coaxial RF connectors for professional telecommunications: UHF, F, BNC, TNC and N series, in Alfar you will find exactly what you need; a company in which we work for and by our customers, always attentive to the latest market trends to give the best response to their needs.

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