sales@foscoconnect.com
(510) 319-9878
Silicon Valley, CA, USA
Overview
The ST fixed attenuator kit consists of a 5-pack of washer-style attenuators, each featuring a distinct color to aid in identification. These attenuators are designed to be placed at the light source, spacing mated connectors to introduce a controlled amount of optical loss in the fiber link.
This solution is intended for use in environments where specific signal level adjustments are required to prevent receiver saturation. Because attenuation is achieved through connector spacing, actual decibel loss is dependent on several environmental and physical factors rather than a fixed value assigned to each color.
Key Features
-
Color-Coded Design
Features five distinct colors for quick identification and organization of attenuation levels. -
Washer-Style Form Factor
Easily installed at the light source to manage optical power levels. -
Adjustable Signal Loss
Uses connector spacing to introduce signal attenuation for precision link balancing. -
Versatile Application
Supports both 850nm and 1300nm operating wavelengths. -
Standard ST Compatibility
Compatible with standard ST-style fiber optic connections. -
Convenient Kit Packaging
Supplied as a 5-pack to ensure a range of attenuation options are available on-site.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | A450FIS |
| Connector Type | ST |
| Pack Quantity | 5 |
| Typical Loss (Red) | 2.5dB @ 850nm / 7.4dB @ 1300nm |
| Typical Loss (Blue) | 3.6dB @ 850nm / 9.1dB @ 1300nm |
| Typical Loss (Green) | 4.8dB @ 850nm / 10.2dB @ 1300nm |
| Typical Loss (Gold) | 5.5dB @ 850nm / 11.3dB @ 1300nm |
| Typical Loss (Silver) | 6.0dB @ 850nm / 11.7dB @ 1300nm |
Frequently Asked Questions
Are the dB values fixed?
No, these attenuators do not have hard-assigned dB values. The actual loss depends on various physical factors and installation conditions.
Where are these installed?
These are designed to be placed at the light source between mated connectors.
What is included in the pack?
The pack includes 5 attenuators, one of each color: Red, Blue, Green, Gold, and Silver.

