Core programme · Made in Mittenaar, Germany

Fiber Optic Connectors and Adapters

FSMA 905 connector in a CAD cutaway: metal ferrule, housing and red O-ring

FEMOtech manufactures standard fiber optic connectors from various metals, optionally with metal or ceramic ferrules and bore diameters from 70 µm: FSMA 905, LD80, DIN and FCPC plus the matching adapters. Every data sheet is an open download, every specification also a table on this page.

Catalog · 9 types

Standard programme with open data sheets

SMAS-XXXX-RS / -SK · DIN EN 61754-22

FSMA 905 Connector

Ferrule made of Arcap, copper or stainless steel, or entirely stainless steel. Also available with O-ring.

Data sheet PDF 221 kB Inquire about this type

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Specification FSMA 905 Connector
Part number	SMAS-xxxx-RS (knurl) · SMAS-xxxx-SK (hexagon)
Standard	DIN EN 61754-22
Ferrule bore	100–1200 µm, other sizes on request
Ferrule	Arcap, copper or stainless steel, one-piece with retaining ring
Nut	Nickel-plated brass or stainless steel
Mating cycles	500
Operating temperature	−40 °C to +85 °C, up to 350 °C on request
Note	Above bore Ø 500 µm without nipple

Free-standing FSMA 905 connector by FEMOtech

SMAL-XXXX-RS / -SK · DIN EN 61754-22

FSMA 905 Connector, free-standing

Free-standing fiber version with Arcap, copper or stainless steel ferrule.

Data sheet PDF 221 kB Inquire about this type

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Specification FSMA 905 Connector, free-standing
Part number	SMAL-xxxx-RS (knurl) · SMAL-xxxx-SK (hexagon)
Standard	DIN EN 61754-22
Design	free-standing fiber
Mating cycles	500
Operating temperature	−40 °C to +85 °C, up to 350 °C on request

LD80-S-XXXX-ME-OV_FT

LD80-Compatible Connector

With or without anti-rotation lock, copper ferrule, screwable stainless steel dust cap.

Data sheet PDF 221 kB Inquire about this type

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Specification LD80-Compatible Connector
Part number	LD80-S-XXXX-ME-OV_FT
Ferrule bore	100–1400 µm, other sizes on request
Ferrule	Copper, one-piece with retaining ring
Nut	Stainless steel, hexagon
Mating cycles	200
Operating temperature	−40 °C to +85 °C

Free-standing LD80-compatible connector by FEMOtech

LD80-L-XXXX-ME-OV-MV_FT

LD80-Compatible Connector, free-standing

Free-standing version, with or without anti-rotation lock.

Data sheet PDF 221 kB Inquire about this type

DIN-XXXX-GFxx · DIN EN 61754-3

DIN Connector

Spring-loaded or rigid, with metal or ceramic ferrule.

Data sheet PDF 221 kB Inquire about this type

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Specification DIN Connector
Standard	DIN EN 61754-3:2003-01
Versions	spring-loaded / rigid · metal or ceramic ferrule
Ferrule bore	128–1100 µm (metal ferrule)
Nut	Nickel silver, knurl
Mating cycles	500
Operating temperature	−40 °C to +85 °C

FCPC-M-XXXX-RS-xx

FCPC Connector

Metal or ceramic ferrule, with anti-rotation device (narrow/wide key). Suitable for PM fiber.

Data sheet PDF 221 kB Inquire about this type

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Specification FCPC Connector
Part number	FCPC-M-XXXX-RS-xx
Ferrule bore	200–1100 µm, other sizes on request
Anti-rotation device	Narrow key 1.97–2.02 mm · wide key 2.09–2.14 mm
Nut	Nickel-plated brass, knurl; stainless steel dust cap
Mating cycles	500
Operating temperature	−40 °C to +85 °C
Use	incl. polarization-maintaining fibers (PM), key alignment

SMAK-XD10-08SW / -XD30-10SW · DIN EN 61754-22

FSMA Adapter

Key width 8, key width 10 or continuous thread. Nickel silver, incl. hexagon nut, washer and two dust caps.

Data sheet PDF 221 kB Inquire about this type

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Specification FSMA Adapter
Standard	DIN EN 61754-22
Versions	SW8 · SW10 · continuous thread
Material	Nickel silver
Scope of delivery	hexagon nut, washer, 2 dust caps
Mating cycles	500
Operating temperature	−40 °C to +85 °C

LD80-compatible coupling flange by FEMOtech

KLD80-MV-11

LD80 Adapter

LD80-compatible coupling flange made of copper, with anti-rotation device.

Data sheet PDF 221 kB Inquire about this type

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Specification LD80 Adapter
Part number	KLD80-MV-11
Material	Copper
Anti-rotation device	yes
Mating cycles	200
Operating temperature	−40 °C to +85 °C

Stainless steel FC adapter with ceramic sleeve by FEMOtech

FCK-XE02A · DIN EN 61754-13

FC Adapter, Stainless Steel

Stainless steel adapter with ceramic sleeve and anti-rotation device (narrow/wide key), 1000 mating cycles.

Data sheet PDF 221 kB Inquire about this type

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Specification FC Adapter, Stainless Steel
Part number	FCK-XE02A
Standard	DIN EN 61754-13
Material	Stainless steel, ceramic sleeve
Anti-rotation device	Narrow key 2.03–2.08 mm (type R) · wide key 2.15–2.20 mm (type N)
Mating cycles	1000
Operating temperature	−40 °C to +85 °C

Accessories

Connector Accessories

Captive dust caps for FSMA connectors, dust caps made of aluminium, PEEK and other materials.

Inquire about accessories

Material guide

Which ferrule for which application?

The ferrule guides the fiber and defines how precise, how hot and how powerful a connection may run. FEMOtech machines metal ferrules from Arcap, copper and stainless steel in-house and drills them exactly to your fiber. Full decision guide: metal or ceramic ferrule.

FerruleGuides the fiber. Bores from 70 µm, one-piece with retaining ring.
O-ringOptional sealing of the FSMA 905 O-ring version.
HousingTurned from nickel-plated brass or stainless steel, knurl or hexagon.

Arcap, copper or stainless steel

A metal ferrule is a turned fiber guide whose bore can be freely matched to the fiber diameter. That is its strength: FEMOtech drills metal ferrules from 70 µm exactly to your fiber instead of limiting you to standard inner diameters.

Arcap: non-magnetic alloy, corrosion-resistant; lead-free on request as Arcap Zest®
Copper: high thermal conductivity, preferred at high laser powers
Stainless steel: mechanically robust and corrosion-resistant

For high-power and high-temperature applications the path almost always leads to the metal ferrule: to the custom solutions.

Ceramic for standard fiber geometries

Ceramic ferrules offer excellent dimensional stability and wear-free mating cycles for common fiber geometries. FEMOtech uses them in the DIN and FCPC programme and in the FTTH connector system (ferrules Ø 1.25 mm and Ø 2.50 mm).

Where your application sits between both worlds, we advise based on fiber, power and environment: send an inquiry.

Custom solutions to your specification

Where the catalog ends, we begin.

3 kWCustom connectors for high-power laser applications

400 °CConnectors for high-temperature environments

⌀ 70 µmIndividual bore and concentricity, matched to your fiber

Custom solutions in detail Inquire directly

Overview

Connector types compared

Comparison of FEMOtech connector types
Type	Standard	Ferrule	Bore	Mating cycles	Op. temperature
FSMA 905	DIN EN 61754-22	Arcap / copper / stainless	100–1200 µm	500	−40…+85 °C, up to 350 °C o.r.
LD80-compatible	–	Copper	100–1400 µm	200	−40…+85 °C
DIN	DIN EN 61754-3	Metal / ceramic	128–1100 µm	500	−40…+85 °C
FCPC	–	Metal / ceramic	200–1100 µm	500	−40…+85 °C
FC adapter	DIN EN 61754-13	Ceramic sleeve	–	1000	−40…+85 °C

Source: FEMOtech data sheets, revisions 03.2025 to 05.2026. All values also in the linked PDFs.

Frequently asked questions

Which fiber optic connector types does FEMOtech manufacture?

FEMOtech manufactures FSMA 905 connectors (standard and free-standing), LD80-compatible connectors, DIN connectors and FCPC connectors as well as FSMA, LD80 and FC adapters. All types are available with metal ferrules; DIN and FCPC optionally with ceramic ferrules. Accessories such as captive dust caps complete the programme.

What ferrule bore diameters are available?

Standard connectors are available with ferrule bores from 70 µm. The data sheet standard ranges span 100 to 1400 µm depending on the type; other diameters are machined on request, matched exactly to your fiber. For special bores and tight concentricity see custom fiber optic solutions.

Metal or ceramic ferrule: which is better?

It depends on power, temperature and fiber. Metal ferrules made of Arcap, copper or stainless steel dissipate heat and can be drilled to individual diameters; ceramic ferrules offer excellent dimensional stability for standard fiber geometries. Our article metal or ceramic ferrule gives a full decision guide.

Can I download data sheets without registering?

Yes. Every connector type on this page links its complete data sheet as a PDF, directly and without a form. The key values are additionally shown as a table on this page.

Does FEMOtech build connectors to customer specification?

Yes, that is a core part of our production: individual bore diameters and concentricity, high-power connectors up to 3 kW and high-temperature versions up to 400 °C. Send your specification or drawing via the custom solution inquiry.

Direct line

Which connector fits your fiber?

Marta Steidel and the sales team answer specification questions directly, without a ticket queue.

Send inquiry Call directly

Sales

Marta Steidel +49 2778 696694-19 · ed.hcetomef@lediets.m