ST fiber optic connector with bayonet coupling mechanism
ST fiber optic connector detail view showing metal ferrule housing
Fiber Optic Connector

STFiber Optic Connector — Bayonet Mount for Industrial & Legacy Networks

ST fiber optic connector with 2.5mm ferrule and bayonet twist-lock coupling mechanism. Designed for vibration-resistant connections in industrial, military, and legacy Ethernet network environments. Available in single mode and multimode.

Connector TypeST/UPC, ST/APC
Fiber ModeSM 9/125μm, MM 50/125μm, MM 62.5/125μm
Insertion Loss≤0.3dB (typical), ≤0.5dB (max)
Return Loss≥45dB (UPC), ≥60dB (APC)
Durability≥500 mating cycles
Operating Temperature-40°C to +85°C
Specifications

Technical Specifications

Connector Type
ST/UPC, ST/APC
Ferrule Diameter
2.5mm
Ferrule Material
Zirconia Ceramic
Fiber Mode
SM 9/125μm, MM 50/125μm, MM 62.5/125μm
Polish Type
UPC / APC
Insertion Loss
≤0.3dB (typical), ≤0.5dB (max)
Return Loss
≥45dB (UPC), ≥60dB (APC)
Durability
≥500 mating cycles
Repeatability
≤0.1dB
Operating Temperature
-40°C to +85°C
Cable Compatibility
0.9mm, 2.0mm, 3.0mm
Coupling Mechanism
Bayonet twist-lock (spring-loaded)
Standards
IEC 61754-2 · TIA-604-2 (FOCIS 2) · Telcordia GR-326
Key Features

Engineered For Performance

Bayonet Twist-Lock Coupling

Spring-loaded bayonet mechanism provides secure, vibration-resistant connections that stay locked even in high-vibration industrial and military environments.

Rugged Metal Construction

Metal housing and bayonet ring withstand harsh operating conditions, making ST connectors the proven choice for factory floors, military systems, and outdoor installations.

Wide Temperature Range

Operating temperature range of -40 to +85 degrees C ensures reliable performance in extreme environments from cold-storage facilities to outdoor equipment enclosures.

Typical Applications

01

Industrial Automation

Process control networks, SCADA systems, and factory floor communications where vibration resistance and rugged construction are critical requirements.

02

Military & Defense

Shipboard, vehicular, and field-deployed fiber networks requiring secure, vibration-proof connections that maintain signal integrity under mechanical stress.

03

Legacy Ethernet Networks

10BASE-FL and 100BASE-FX fiber Ethernet installations in buildings and campuses where ST infrastructure is already deployed and maintained.

Interested in this ST Connector?

Tell us your quantity, cable length, and any custom requirements. Our engineering team will respond with a detailed quote within 24 hours.

TTI Fiber 12,000 sqm manufacturing facility in Shenzhen, China

Why TTI Fiber

Trusted Manufacturer Since 2013

TTI Fiber is a professional fiber optic manufacturer based in Shenzhen, China. We provide full OEM/ODM services with factory-direct pricing and dedicated engineering support.

12,000sqmManufacturing Base
15+yearsIndustry Experience
100+countriesProducts Exported
30+brandsGlobal Partners
ISO9001ISO14001CERoHSCPRREACH

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