SMA905 Fiber Optic Connector

 

SMA905 fiber optic connectors, also known as FSMA connectors, are widely recognized in the industry for fiber optic interconnection systems. Widely used in military, industrial and medical applications. Our SMA905 Fiber Optic Connectors feature threaded coupling nuts and feature stainless steel ferrules in sizes up to 2000 micron ID to accommodate a wide variety of multimode fibers.

 

 

 

• Threaded nut connector
• Ferrule aperture size is up to 2000 microns, suitable for various high-power energy transmission fibers
• Ceramic ferrule, metal ferrule (suspension/groove), with glue-free process, has better heat dissipation and stability.

 

 

• Medical
• Laser transmission
• Spectrometer
• Industrial laser processing
• Power detection and sensing

 

 

Insertion Loss(Multimode Fiber)	0.3dB
Material - Body	Stainless steel
Fiber Type	multimode
Fiber Hole Size	126um-2000um
Durability	1000 times plugging and unplugging
Temperature Range	-40℃~+85℃
Sheath Type	PVC/miniature armor pipe/metal double button pipe/ETFE

 

 

 

1. What is an SMA Fiber Connector?

The SMA fiber connector is a type of fiber optic connector originally designed for use with laser diode modules and laboratory equipment. It features a threaded coupling mechanism and a ceramic ferrule with a 1.25 mm diameter that precisely aligns the optical fiber core for efficient light transmission.

 

2. What types of fibers are compatible with SMA905 connectors?

SMA905 connectors are commonly used with:

Single-mode fibers (SMF)

Multimode fibers (MMF)
They are widely used in research labs, telecom, and laser systems.

 

3. What are the key features of SMA905 connectors?

Threaded coupling for reliable, vibration-resistant connection

Ceramic ferrule for precise fiber alignment

Compatible with 125 µm cladding fibers

Suitable for lab and test environments

 

4. What are typical insertion loss and return loss values?

Insertion Loss: Typically around 0.3 dB or better with high-quality polishing

Return Loss: Generally >40 dB for single-mode fibers

 

5. Are SMA905 connectors interchangeable with other connector types?

No, SMA905 connectors are not compatible with other common connector types such as FC, ST, or LC without adapters due to differences in ferrule size, coupling method, and keying.

 

6. What are common applications of SMA905 connectors?

Laboratory and test equipment

Fiber-coupled laser diode modules

Optical sensors and instrumentation

 

7. What is the durability of SMA905 connectors?

SMA905 connectors can withstand hundreds of mating cycles but are less commonly used in high-density or field applications compared to more modern connectors like FC or LC.

 

8. How do I clean and maintain SMA905 connectors?

Use lint-free wipes and isopropyl alcohol for cleaning ferrules

Inspect ferrules with a fiber inspection microscope before mating

Avoid touching ferrule end-faces to prevent contamination

 

9. Can SMA905 connectors be used in harsh environments?

They are generally not designed for rugged or outdoor environments. For such uses, connectors with better sealing and strain relief, such as MIL-DTL-38999 or ARINC 801 types, are recommended.
 

10. Difference Between SMA905 and SMA906 Fiber Optic Connectors

Feature	SMA905	SMA906
Ferrule Length	Approximately 5.5 mm	Longer ferrule, approximately 9.0 mm
Ferrule Diameter	1.25 mm ceramic	1.25 mm ceramic
Usage	Commonly used for standard fiber optic connections, often in laser diode modules and lab equipment	Designed to extend fiber further into the device; used when the fiber needs to be inserted deeper for better coupling
Typical Application	General purpose fiber optic connections	Situations requiring precise fiber positioning, often in sensor or interferometer applications
Coupling Mechanism	Threaded coupling nut	Threaded coupling nut
Compatibility	Not directly compatible due to different ferrule lengths	Not directly compatible with SMA905 without adapters

 

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