QSS - Quarter-Wavelength Shorted Stub

Quarter-wavelength shorted stub arrestors provide an unmatched level of lightning and surge protection for sensitive RF equipment. By engineering an internal, permanent short circuit, these components are ‘always-on,’ a design that provides instantaneous protection by eliminating response time. They effectively divert harmful transient energy that falls outside the designated RF passband before it can reach and damage critical systems. The NexTek QSS series revolutionizes this technology with a unique, patented stubless architecture. This innovative, in-line design removes the bulky T-style protrusion common on traditional stubs, allowing the arrestor to be installed in compact, space-constrained environments without compromising the high-performance surge handling and long-term durability inherent to the quarter-wave design.

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Key Features and Benefits:

Shorted-stub design provides instantaneous response time
Frequency range: 0.300–6 GHz
Protects against lightning, ESD, and EMP events
Patented stubless architecture for compact installation
Available in N-Type, TNC, and 4.3-10 connector formats
Inherent DC-blocking design
Solid-state and maintenance-free with no aging or wear

Selection Tool

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Connector Types

N-Type
TNC
4.3-10

Frequency Range

0.300 – 6 GHz

Threat Types

Lightning [LEMP]
Static [ESD]
High Speed [EMP]

Design Highlights

Quarter-Wavelength Shorted Stub Technology
Instantaneous Response Time
Patented Stubless Form Factor
Class-Leading Surge Ratings
Solid-State Reliability
Designed, Assembled, and Tested in the USA

Applications for QSS Quarter-Wavelength Shorted Stub Arrestors

With a robust design and advanced technical characteristics, NexTek QSS series arrestors are the solution for protecting a wide range of mission-critical RF applications. They are frequently deployed to safeguard high-value radio equipment on cellular towers to maintain uptime for 5G, LTE, and CBRS systems. The high reliability of the QSS series also makes them a preferred choice for commercial and military satellite and GPS communication links, public safety land mobile radio systems, and industrial wireless networks.

The technology provides an “always-on” short circuit to ground, which instantly diverts energy from lightning-induced surges (LEMP) and other electrical transients like electrostatic discharge (ESD). This performance makes them a vital component for preserving the integrity of communications infrastructure worldwide.