SC fiber optic loopback module UPC single mode
SC fiber optic loopback module APC
Fiber Optic Loopback

SCFiber Optic Loopback Module — UPC & APC, Single Mode & Multimode

SC fiber optic loopback module for network testing and diagnostics. Available in UPC and APC polish types, supporting single mode and multimode fiber. Precision ceramic ferrule and compact molded housing for reliable loopback testing of switches, media converters, and optical network equipment.

Connector TypeSC/UPC, SC/APC
Fiber ModeSM 9/125μm, MM 50/125μm, MM 62.5/125μm
Insertion Loss≤0.3dB
Return Loss≥50dB (UPC), ≥60dB (APC)
Durability≥500 mating cycles, IL < 0.5dB
Operating Temperature-20°C to +70°C
Specifications

Technical Specifications

Connector Type
SC/UPC, SC/APC
Fiber Mode
SM 9/125μm, MM 50/125μm, MM 62.5/125μm
Ferrule Diameter
2.5mm
Ferrule Material
Zirconia Ceramic
Insertion Loss
≤0.3dB
Return Loss
≥50dB (UPC), ≥60dB (APC)
Wavelength
1310nm (SM), 850nm (MM)
Durability
≥500 mating cycles, IL < 0.5dB
Operating Temperature
-20°C to +70°C
Jacket Color
Yellow (SM), Orange (MM OM1/OM2), Aqua (MM OM3)
Dimensions
53 x 14 x 12mm
Standards
IEC 61754-4 · TIA-604-3 (FOCIS 3) · Telcordia GR-326
Key Features

Engineered For Performance

Dual Polish Options

Available in UPC (≥50dB return loss) and APC (≥60dB return loss) polish types, accommodating both standard data networking and analog/CATV loopback testing requirements.

Precision Ceramic Ferrule

2.5mm zirconia ceramic ferrule provides precise fiber core alignment for consistent, low-loss loopback measurements across repeated insertions.

Rugged Molded Construction

Fully molded connector housing protects the internal fiber loop from mechanical stress, making the module suitable for field deployment and repeated handling.

Broad Protocol Support

Compatible with Fast Ethernet, Gigabit Ethernet, Fiber Channel, ATM, and GPON equipment testing across a wide range of network protocols and data rates.

Typical Applications

01

FTTH Equipment Verification

Test OLT and ONU SC ports in GPON and XGS-PON deployments to confirm transceiver performance before subscriber line activation.

02

Premise Network Diagnostics

Troubleshoot fiber links in enterprise and campus networks by performing port-by-port loopback checks on SC-equipped switches and patch panels.

03

Manufacturing Quality Control

Validate SC transceiver modules and optical equipment during production line testing and final quality assurance inspection.

Interested in this SC Loopback?

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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