Rojone Pty Ltd
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NexTek is a premier source for Coaxial/RF Surge Protection and High Current EMC/EMI Filters. The company’s solutions are used worldwide to ensure proper system performance and compliance across all 7 Continents and even into space!

As a small business founded in 1986, it started life as an EMC Consulting company. After about ten years of consultation, they decided to focus on and develop two major product lines under the general “EMC Solution” umbrella. NexTek Coaxial RF Lightning and Surge Protector designs use Gas Discharge, Quarter-Wave, and Multistage technology with their High Current EMI Feedthrough Filter solutions using C-Type (Capacitive) Filter technology.

The company’s military-grade product portfolio delivers superior performance and value to the military, aerospace, industrial, communications, and medical electronics industries. NexTek is a Massachusetts-based, ISO Certified small business.

The NexTek Range

RF Surge Arrestors

  • DC Block Protectors (DCB)
  • DO-160 Protectors (FPD)
  • HEMP Protectors (FPH)
  • FPL – LEMP Protectors (FPL)
  • FPN – NEMP Protectors (FPN)
  • PTC – Gas Discharge Tube Arrestors (PTC)
  • PTI – Isolated Protectors (PTI)
  • PTR – Replaceable GDTs (PTR)
  • QSS – Quarter-wave Shorted Stub (QSS)
  • QWS – Quarter-wave Stub (QWS)

High Current EMI/EMC Filters

  • Failsafe Redundant Filters (FSH)
  • Pi Filter (HCP)
  • Pi Suppressor (HCS)
  • High-Current Filters (HPR)
  • E-Series – Extended Burn-In HPRs (HPR)

Power/LAN Protection

  • AC Line Arrestors (ACL)
  • DC Line Arrestors (DCL)
  • Data Line Arrestors (DLP)


  • Replacement GDT
  • Testing Accessories
  • Grounding Accessories
  • Protection Voltage Tester