ST Connector Cable Assemblies

Amphenol Fiber Optic Products manufactures custom cable assemblies and pigtails offshore for high-volume, built-to-print applications.
Built with Amphenol ST and STII connectors, customers typically specifies the fiber optic cable.

Over 70 years of proven performance with industry-wide connectors.
Durable, designed for harsh indoor environments and medical applications.
Vertical integration ensures reliable lead times and timely deliveries.

Manufactured to meet Amphenol’s strict quality standards.
Worldwide facilities provide localized support and reduce logistics challenges.
New Vietnam facility equipped for high-volume production.
Dedicated engineering support for custom applications.

ST II Connectors with Ceramic Ferrules

Part Number	Description	Ferrule Hole Size	Ferrule Tolerance	Mode	Ferrule Material	Body Material	Nut Material	Insertion Loss	Return Loss	Boot Diameter	Boot Color
953-101-5306-P	ST II Connector	126µm	+1,-0 µm	SM	Zirconia	Zinc Die Cast and Nickel Plated	Zinc Die Cast and Nickel Plated	.15dB	55 dB	3mm or 900 µm	Black
953-101-5310-P	ST II Connector	128µm	+4,-0 µm	MM	Zirconia	Zinc Die Cast and Nickel Plated	Zinc Die Cast and Nickel Plated	.35dB	55 dB	3mm or 900 µm	Black
953-101-5316-P	ST II Connector	126µm	+1,-0 µm	SM	Zirconia	Zinc Die Cast and Nickel Plated	Zinc Die Cast and Nickel Plated	.15dB	55 dB	2 mm	Black
953-101-5309-P	ST II Connector	128µm	+4,-0 µm	MM	Zirconia	Zinc Die Cast and Nickel Plated	Zinc Die Cast and Nickel Plated	.35dB	55 dB	2mm	Black

STII Connectors with Stainless Ferrules

Part Number	Description	Ferrule Hole Size	Ferrule Tolerance	Mode	Ferrule Material	Body Material	Nut Material	Insertion Loss	Return Loss	Boot Diameter	Boot Color
953-106-50128-P	ST II Connector	128µm	+5,-0 µm	MM	Stainless Steel	Zinc Die Cast and Nickel Plated	Zinc Die Cast and Nickel Plated	.35dB	55 dB	3mm or 900 µm	Black
953-106-50144-P	ST II Connector	144µm	+5,-0 µm	MM	Stainless Steel	Zinc Die Cast and Nickel Plated	Zinc Die Cast and Nickel Plated	.35dB	55 dB	3mm or 900 µm	Black
953-106-50231-P	ST II Connector	231µm	+10,-0 µm	MM	Stainless Steel	Zinc Die Cast and Nickel Plated	Zinc Die Cast and Nickel Plated	*	*	3mm or 900 µm	Black
953-106-50440-P	ST II Connector	440µm	+15,-0 µm	MM	Stainless Steel	Zinc Die Cast and Nickel Plated	Zinc Die Cast and Nickel Plated	*	*	3mm or 900 µm	Black
953-106-51520-P	ST II Connector	1520µm	+25,-0 µm	MM	Stainless Steel	Zinc Die Cast and Nickel Plated	Zinc Die Cast and Nickel Plated	*	*	3mm or 900 µm	Black

ST Connectors with Ceramic Ferrules

Part Number	Description	Ferrule Hole Size	Ferrule Tolerance	Mode	Ferrule Material	Body Material	Nut Material	Insertion Loss	Return Loss	Boot Diameter	Boot Color
953-101-5006-P	ST Connector	126µm	+1,-0 µm	SM	Zirconia	Plastic	Plastic	.15dB	55 dB	3mm or 900 µm	Black
953-101-5010-P	ST Connector	128µm	+4,-0 µm	MM	Zirconia	Plastic	Plastic	.35dB	55 dB	3mm or 900 µm	Black

ST Connectors with Stainless Steel Ferrules

Part Number	Description	Ferrule Hole Size	Ferrule Tolerance	Mode	Ferrule Material	Body Material	Nut Material	Insertion Loss	Return Loss	Boot Diameter	Boot Color
953-107-50128-P	ST Connector	128µm	+5,-0 µm	MM	Stainless Steel	Plastic	Plastic	.35dB	55 dB	3mm or 900 µm	Black
953-107-50144-P	ST Connector	144µm	+5,-0 µm	MM	Stainless Steel	Plastic	Plastic	.35dB	55 dB	3mm or 900 µm	Black
953-107-50231-P	ST Connector	231µm	+10,-0	MM	Stainless Steel	Plastic	Plastic	*	*	3mm or 900 µm	Black
953-107-50440-P	ST Connector	440µm	+15,-0	MM	Stainless Steel	Plastic	Plastic	*	*	3mm or 900 µm	Black
953-107-51520-P	ST Connector	1520µm	+25,-0	MM	Stainless Steel	Plastic	Plastic	*	*	3mm or 900 µm	Black

Features and Benefits

Precision-molded, flame-retardant polymer for lightweight durability (ST Connector).
Zinc die-cast with nickel plating for superior strength and corrosion resistance (STII Connector).
Zirconia ferrules minimize insertion and return loss for high-precision performance.
Available in Single Mode (SM) and Multimode (MM) versions.
Boot options: 900 µm, 2.0 mm, 3.0 mm, 45/90-degree, and flex boots.
Ideal for cable assemblies, optical assemblies, and pigtails.

ST Connector is a
Polymer Molded Connector

/

STII Connector is a
Die Cast Connector

Typical uses for assemblies with ST connectors:

Temperature Sensor Connector, Pressure Sensor Connector, Semiconductor Test Connector
Applications: Datacom, Medical ( non MRI) , Lasers, Semiconductor process equipment , Power Market for Transformers, EV Test, Instrumentation and High voltage temperature measurement, Extension Cables (Patch Cords)

Amphenol 953

The Amphenol 953 series Fiber Optic ST and STII connector utilizes a bayonet-style mating connector to provide a secure, Robust coupling mechanism.
This features a push-to-turn locking mechanism for positive engagement. This prevents overtightening and fiber face damage. It can be used with large core fibers.

ST Dust Cap

Dustcap ST Accessories Part Number	Description
953-1061	ST Dustcap with Chain, 0.130" diameter ring
953-1079	ST Dustcap with Chain, 0.380" diameter ring

Note: * means Insertion loss and return loss figures are based upon Fiber type and specification

ST Connector Boots

High Performance

Standard

Short

45°

90°

Flex Boot

Side A Selection Guide:

Connector - ST or STII or Model #

Ferrule Material - Ceramic or Stainless Steel

Ferrule Hole Size - (125 - 2200um)

Body Material - Die Cast Metal or molded Polymer

Boot Model Number - Specified from Model# (ST Boots Sec >)

Boot Shape - Straight, 45 or 90 angle

Boot Color - Specified from Model# (ST Boots Sec >)

Boot Length - Specified from Model# (ST Boots Sec >)

Dust Cap - Specified from Model# (ST Boots Sec >)

Side B Selection Guide: