LC Fiber Connector Specifications

June 30, 2010
By Colin Yao

You can get LC connectors from Fiber Optics For Sale Co. by clicking the link here:

http://www.fiberoptics4sale.com/page/FOFS/CTGY/Fiber_Optic_LC_Connectors

LC Fiber Connector

LC Fiber Connector

 

:: What are LC Fiber Connectors?

LC connector was developed by Lucent Technologies and is a more evolutionary approach to achieving the goals of a SFF (small form factor) connector.

LC connector utilizes traditional components of a SC duplex connector having independent ceramic ferrules and housings with the overall size scaled down by one half.

The LC family of connectors includes a stand-alone simplex design; a “behind the wall” (BTW) connector; and the duplex connector available in both single mode and multimode tolerances, all designed using the RJ-style latch.

:: LC Connector Applications

The LC Connector Product is a robust optical connector designed to support Telecom and Datacom networks. The connector family includes but not limited to Jumper Connectors, Behind the Wall connectors (BTW), Adapters, Attenuators, Jumpers and an assortment of connector modules and panels.

The connector is defined as the plug portion equipped with a tunable cylindrical ferrule while incorporating unique trigger and latch features.

The LC Connector family provides a size reduction relative to traditional connectors, which has coined the term Small Form Factor connectors (SFF). SFF connectors are typically 50% smaller than standard SC and ST fiber products. The LC was designed to be a high performance SFF incorporating traditional technology, advances in latching systems, and versatile enough for both single mode and multimode fiber applications.

:: Types of LC Connectors and Their Respective Applications

LC connector comes in single mode and multimode tolerances. For single mode, it also features LC/UPC and LC/APC polish. LC/APC has a 8 degree angle to minimize back reflection and can be easily recognized by its green colored housing and strain relief boot.

 

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Single Mode Simplex LC/UPC Connector (Blue color)

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Multimode Duplex LC/PC Connector (Beige color)

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Single Mode LC/APC Connector (Green color)

1) LC 1.5 to 2.0 mm Unibody Connectors for jumpers

Connectors designed to mount onto 1.5 to 2.0 mm fiber cordage and intended to meet the Telcordia specification GR326 Type I Media (~3.0mm). Simplex and duplex are available.

2) LC 3.0 mm Unibody Connectors for jumpers

Connectors designed to mount onto 3.0 mm fiber cordage and intended to meet the Bellcore/Telcordia specification GR326 Type I Media (~3.0mm). Simplex and duplex are available.

3) LC BTW Connectors

Shorter LC connectors designed for 0.9 mm buffered fiber. This product is intended to meet Telcordia specification GR326 Type II Media (0.9 mm).

4) LC BTW Unibody Connectors

Connectors based on the Unibody connector and equipped to mount onto 0.9 mm buffered fiber and intended to meet the Telcordia specification GR326 Type II Media (0.9 mm).

:: Industry Standards for LC Connector Products

1) TIA 568 for A & B port identification on duplex adapters and connectors
2) TIA/EIA-604-10A, FOCIS 10 Fiber Optic Connector Intermateability Standard – Type LC
3) Fibre Channel Physical Interfaces (Physical Interface 11) for LC
4) IEC 61754-20 (2002-08) Fibre Optic Connector Interfaces – Part 20: Type LC Connector Family

 

:: LC Connector Product Specification

1) LC Connector Application

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2) LC Simplex Jumper Connector Components – Exploded View

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3) LC Duplex Jumper Connector Components – Exploded View

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4) LC Simplex Jumper Connector Components for Buffered Fiber – Exploded View

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5) LC Duplex Jumper Connector Components for Buffered Fiber – Exploded View

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6) LC BTW (Behind the Wall) Connector Components – Exploded View

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7) LC Connector Footprint Dimensions

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Ref.

Minimum (mm)

Maximum (mm)

A

30

B

32

C

0.7

1.4

D

49

E

51

F

1.8

3.4

G

35.3

37.3

8. LC Connector Materials (UL 94 Rating or equivalent)

Connector Part

Material

UL 94 Raing

Oxygen Index

Connector Housing

Engineering Plastic

V-0

50

Extender Cap

Engineering Plastic

V-0

50

Jumper Boot

TPE

V-0

Heat Shrink Tubing (H.S.T.)

Polyolefin

UL 224 VW-1

T.B.D.

BTW Boot

TPE

V-0

>28

Simplex Collar

PA

V-0

>28

Duplex Yoke

PA

V-0

>28

Dust Cap

Plastic

V-0

>28

Spring

Metal

Ferrule

Ceramic

Crimp Sleeve

Metal

Strength Member Tube

Metal

Barrel for Ferrule

Metal

Guide Tube for Barrel

PTFE

V-0

>28

 

9) LC Simplex Connector Specifications for Intermateability

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Dimension Minimum (mm) Maximum (mm) Notes
A 1.25 1.25 reference, note 1
B 4.92 5.00 note 3
C 4.2 4.4  
D 3.2 3.35  
E 2.2 2.4  
F 0.3 0.5 radius
G 5.6 5.7  
H 4.42 4.52 square, note 5
I 3.0 3.2 diameter
J 3.3 3.5  
L 0.8 1.0  
M 0.3 0.5  
N 1.2 1.4  
O 1.1 1.3  
P 5.2 5.4  
Q 8.5 8.7  
R 0.4 0.6 radius
S 30   degrees, typical
T 1.4 1.6  
U 5.0 5.1  
V 21   degrees, typical
W 14   degrees, typical
X 0.5 0.7  
Y 0.6 0.85  

Note 1: Ferrule Diameter: SM 1.2485-1.2495mm, MM 1.2463-1.2495mm.

Note 2: Final dimensions for the ferrule end face are shown in LC Patchcord Specification OCD-EE-401-3 Sections 3.8 & 3.9

Note 3: Dimension B is for ferrule before polishing. After polish 4.88 to 4.98 mm, typical.

Note 4: See Section 1.7 LC Connector Ferrule Extension and Contact Force.

Note 5: Dimension H refers to the front portion of the connector housing. Tapered 0.2°

10) LC Duplex Connector Specifications for Intermateability

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Dimension Basic (mm)
A 6.25

Note 1: Each of the units in the duplex plug shall comply with all of dimensions of the LC Simplex Connector Specification for Intermateability.

Note 2: The duplex connector ferrules must be free to float to any position within the geometric tolerance.

11) LC Connector Ferrule Extension and Contact Force

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  IF THEN
1 A <= 10.0mm F >= 5 N (510 gf)
2 A >= 9.8 mm F <= 6 N (612 gf)

Note:

Dimension A is for finished ends after all polishing has been completed. Forces shown are for unterminated connectors or buffered fiber only. Different cord constructions can result in higher forces than those shown in the table above.

12) Select LC Connector Sizes

LC Unibody Connectors for Jacketed Cable

    Hole Size Cable Dia. Connector Color Boot Color H.S.T. Color
Simplex MM 127um 2mm Beige White White
Simplex SM 125.5um 2mm Blue White Yellow
Simplex SM/APC 125um 2mm Green Green Yellow
Duplex MM 127um 2mm Beige White-2 White-1
Yellow-1
Duplex SM 126um 2mm Blue White-2 White-1
Yellow-1

LC BTW Connectors for 0.9mm Diameter Buffered Fiber

    Hole Size Cable Dia. Connector Color Boot Color
Simplex MM 127um 0.9mm Beige White
Simplex SM 125.5um 0.9mm Blue White
Simplex SM/APC 125um 0.9mm Green Green

LC Unibody Connectors for 0.9mm Diameter Buffered Fiber

    Hole Size Cable Dia. Connector Color Boot Color
Duplex MM 127um 0.9mm Beige White-2
Duplex SM 126um 0.9mm Blue White-2

 

13) Hole Size (um)

(IEC Standard 0.6mm pedestal) Application  
125.0 –0,+1 high performance single mode
125.5 –0, +1 standard single mode
126.0 –0, +1 easy fit single mode
127.0 –0, +5 standard multimode

 

14) Cable Diameter

  • 1.5 mm to 2mm
  • 3mm
  • 0.9mm buffered fiber

 

15) LC Connector Color Coding

Application

Connector (housing – trigger)

Boot

single mode (SM) blue – blue white
single mode APC (LC/APC) green – green green
multimode (MM) (OM1) beige – beige white
Multimode (MM), 50um (OM2) beige – black (duplex only) white
Multimode (MM) Laser Optimized (OM3) beige – aqua (duplex only) white