QSFP28 100G PASSIVE ELECTRICAL LOOPBACK MODULE; TEST QSFP28 TRANSCEIVERS/PORTS D

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Key Features

RELIABLE QSFP TESTING: Create a loopback test connection with this QSFP28 passive electrical loopback module; Connects directly to QSFP28 ports for testing signal continuity and verifying electrical link integrity at 100Gbps
ACCURATE TEST PERFORMANCE: Supports 28Gbps per lane across four lanes with 100Ω impedance for stable signal reflection; Low jitter and consistent lane performance ensure reliable test results during diagnostics
BUILT FOR DURABILITY: Optimized for multiple test cycles with a compact, low-power design; Meets IEEE 802.3 requirements and MSA compliance for universal compatibility and guaranteed performance
FIELD-READY DESIGN: Compact module is ideal for technicians performing port-level diagnostics and hardware validation; Quickly confirm QSFP28 port behavior during system maintenance or troubleshooting; No optical transceiver required
THE IT PRO'S CHOICE: Our network tools and testers are rigorously tested in our Innovation Lab to ensure enterprise-grade reliability and durability; Built for quick diagnostics and routine maintenance across copper and fiber networks; Backed by free lifetime 24/5 multi-lingual technical assistance

Manuals & Resources

MANUAL User Manual › DATASHEET Product Datasheet › BROCHURE Manufacturer Brochure › MANUAL Assembly Instructions › WARRANTY Warranty Information › DATASHEET Product Fiche › GUIDE Energy Guide › SAFETY Safety Data Sheet › SAFETY Safety Data Sheet (FR) › SAFETY COSHH Sheet › TOUR Product Tour › 360 360° Product View ›

STARTECH.COM Modules

QSFP28 100G PASSIVE ELECTRICAL LOOPBACK MODULE; TEST QSFP28 TRANSCEIVERS/PORTS D

Mfr # LOOPBACKPLUG100G SKU 15411515 UPC 065030923491

$64.40 MSRP $81.99 Save 21%

Regular price saves you $17.59 against MSRP.

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Product Overview

QSFP28 100G PASSIVE ELECTRICAL LOOPBACK MODULE; TEST QSFP28 TRANSCEIVERS/PORTS D

StarTech.com (LOOPBACKPLUG100G) Modules
StarTech QSFP28 Loopback Module, 100G Passive QSFP28 Loopback Adapter, QSFP Port Tester, 100G QSFP Loopback Test Plug - MSA Compliant - QSFP28 100G passive electrical loopback module; Test QSFP28 transceivers/ports directly at 100Gbps for continuity and fault isolation; Supports 1/10/40GBASE and 100GBASE Ethernet (IEEE 802.3bj/802.3by); Passive low-power design; MSA Compliant
StarTech QSFP28 Loopback Module, 100G Passive QSFP28 Loopback Adapter, QSFP Port Tester, 100G QSFP Loopback Test Plug - MSA Compliant
QSFP28 100G passive electrical loopback module; Test QSFP28 transceivers/ports directly at 100Gbps for continuity and fault isolation; Supports 1/10/40GBASE and 100GBASE Ethernet (IEEE 802.3bj/802.3by); Passive low-power design; MSA Compliant

Technical Specifications

Application/Usage	Data Networking
Application/Usage	Optical Network
Product Type	QSFP28
Manufacturer Part Number	LOOPBACKPLUG100G
Packaged Quantity	1 Box
Interfaces/Ports Details	1 x 100GBase-X Network
Limited Warranty	2 Year
Weight (Approximate)	0.08 lb
Length	5"
Manufacturer	StarTech.com
Product Name	QSFP28 Module
Network Technology	100GBase-X
Brand Name	StarTech.com
Height	0.5"
Width	0.7"
Maximum Data Transfer Rate	100 Gbit/s
Ethernet Technology	100 Gigabit Ethernet
Media Type Supported	Optical Fiber
Total Number of Ports	1
TAA Compliant	Yes
Product Color	Silver
Product Material	Plastic
Product Material	Metal
Environmental Compliance	Waste Electrical and Electronic Equipment Directive (WEEE)
Environmental Compliance	Restriction of Hazardous Substances (RoHS)

Marketing Information

MSA Compliant

This QSFP28 Loopback Module is designed for testing 100G ports in switches, NICs, and other QSFP28-equipped devices. It supports passive electrical loopback for verifying signal continuity, link stability, and port behavior without requiring active optics.

Test 100G QSFP28 Connections

The QSFP28 Loopback Adapter emulates 4-lane electrical testing for QSFP28 ports operating at 100Gbps, and supports 40GBASE and 100GBASE Ethernet. It is MSA compliant and meets IEEE 802.3 requirements for reliable performance and universal compatibility.

Accurate Signal Diagnostics

Perform electrical loopback testing for full 100G link verification. Ensure consistent signaling with 100Ω impedance and low jitter for stable, repeatable test results under real-world conditions.

For Enterprise Network Switches

Connect directly to QSFP28 ports on switches, routers, and NICs for inline port testing. Compact and low-power, it is an essential tool for network technicians and IT pros in data centers and edge or on-prem installations.