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A selection from the LEMO electronic and fibre optic range of connectors

LEMO is both the name of an electronic and fibre optic connector manufacturer, based in Écublens, Switzerland, and the name commonly used to refer to push-pull connectors made by that company. LEMO connectors are used in medical, industrial, audio/visual, telecommunications, military, scientific research and measurement applications. The company, founded in 1946, started as a manufacturer of contacts in noble and rare metals. The company took its name from the company founder, engineer on Mouttet.

LEMO ® is a registered trademark of LEMO SA. and the distinctive "chocolate plate" of the LEMO connector design is a registered trademark US Reg 2'703'464 and Europe Registration 798'106.

LEMO has set several connector standards.

The 3K.93C connector[1] has been adopted by the American (SMPTE 304M), Japanese (ARIB BTAS-1005B) and European (EBU R100-1999) standards organisations for HDTV fibre links for the broadcast market.

LEMO 00 coaxial connectors on RG316 cable, below a BNC to LEMO adapter, a male-to-male adapter barrel and a 50 Ω terminator (topmost).

The LEMO 00, a miniature push-pull 50 Ω coaxial connector, is used as front panel connectors in the Nuclear Instrumentation Module (NIM) and Computer Automated Measurement and Control (CAMAC) modular electronics standards used in instrumentation for nuclear and particle physics, where it is used as a replacement for BNC connectors in high density designs (because the LEMO connector is much smaller in size than a BNC).

Due to the modular nature of LEMO connectors, many configuration options are available across the sizes and ranges, with new connector ranges being designed and becoming available on a regular basis, such as LEMO's Tiny Trio [1].

While LEMO connectors were generally developed as proprietary designs, the legal status of many of the older designs is not clear. For example, the LEMO website itself shows a standardisation date of 1970 for the LEMO 00 model. The "chocolate plate" design of the connector's shell grip is, however, trademarked.[2]

In July 2014, LEMO acquired Northwire Inc., a US specialty cable manufacturer of wire and multi-conductor cable and retractiles for the medical, aerospace and defense, energy, and industrial markets. The acquisition of Northwire allows LEMO to provide a complete cable-connector solution.

LEMO offers more than 75,000 combinations of products, that continues to grow through custom specific designs LEMO, and its affiliated sister companies REDEL, NORTHWIRE and COELVER, currently serve more than 100,000 customers in over 80 countries around the world.

LEMO holds 2 addresses in Japan (Tokyo and Osaka), another one in Singapore, two in the USA. LEMO holds offices in Vienna and Budapest.[3]

In 1993 LEMO hired a Swiss citizen, married to a Chinese woman, living in Hong Kong to enter the Chinese market, first in the areas medicine and nuclear. At this time already bad copies of LEMO 00-series-connectors circulated. Later LEMO cooperated with a distributor. 2004 for the first time 220 m2 area has been rented. in 2008 LEMO moved to a 2200 m2 plant, 2015 again – staying in Pudong, Shanghai – to a 5600 m2 plant, where 700 m2 is used as office, 1100 m2 as warehouse and 1900 m2 for cable assembling. A second office is in Beijing.

In Écublens, one of 3 offices in Switzerland, R&D is performed in a test laboratory with a climatic chamber. Organic insulators and sealants must stand extreme cold and/or hot temperatures as well as meet environmental standards. Non-obsolescence: LEMO maintains drawings of all products back to 1970, retains several old machines to reproduce them and holds a huge stock of parts. Line drawings were at first prepared on tracing paper, but four generations of drawing software later, the old drawings can now be exchanged numerically. The headquarters in Switzerland remains the center for special requests. The ability to continue to deliver "ancient" parts for the nuclear industry is particularly important. Arctic Trucks and Brüel & Kjær use LEMO-connectors. In 1995, LEMO designed the F-series "Motorsport Connectors" – robust, lightweight and sealed.[4]

The AKG AV100 Aviation Headset uses a 6-pin LEMO connector.[5][6] Until 2013, when AKG moved from number 21–25, and LEMO Elektronik GesmbH situated on no. 49/E6-3, the two companies where somewhat neighbors in Lemböckgasse, Vienna.[7]


  1. ^ LEMO 3K.93C Catalogue
  2. ^ USPTO registered trademark number 2703464, see LEMO FAQ: Are LEMO connector design trademark registered?
  3. ^ https://www.lemo.com/en/company-video
  4. ^ LEMO Magazine, Connected, No. 5, winter 2015. 36 pp. English edition. – Other editions: German, Chinese. https://www.lemo.com/en/news
  5. ^ The Loss of a Legend AKG Life, retrieved 28 September 2016.
  6. ^ The Most Quiet, Comfortabel and Reliable Headset Available hannesarch.com, retrieved 28 September 2016.
  7. ^ Strategische Neuausrichtung bei AKG: Produktionsverlagerung von Massenfertigung nach Asien bringt Personalabbau mit sich apa.at, OTS0279, 29 September 2009, retrieved 30 September 2016 – German.

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