In rail, defense, and public safety environments, cable assemblies do far more than carry signals—they ensure system uptime, operator safety, and reliable communication under the harshest conditions. Off-the-shelf cables, designed for general-purpose use, often fall short in these mission-critical deployments.

At STI-CO®, we specialize in RF, power, and data cable assemblies that are built to print, custom-engineered, and over-molded for durability and traceability. This post breaks down what makes each cable type critical—and how STI-CO® delivers unmatched quality and compliance across all three.

RF Cable Assemblies: The Backbone of Communication

RF assemblies are the core of any wireless or antenna-based system. Whether for onboard train telemetry, tactical defense platforms, or covert vehicle communications, RF cables must:

• Maintain signal integrity over long distances and through interference
  
  
• Feature precise connector options (SMA, TNC, N-Type, QMA, etc.)
  
  
• Withstand shock, vibration, moisture, and thermal extremes
  
  

STI-CO® builds RF cables with performance-verified specs, including over-molded designs, shielding, and serialized lot traceability. Our assemblies are trusted in defense, aerospace, rail, and public safety applications where RF failure is not an option.

Power Cable Assemblies: Reliability Under Load

Power cables may not get the spotlight, but they’re vital for keeping mission-critical systems operational. In defense or rail environments, power assemblies often:

• Deliver DC voltage to antennas, routers, cameras, or control modules
  
  
• Integrate into multi-signal harnesses
  
  
• Require rugged insulation and over-molding to prevent shorting and wear
  
  

We manufacture power cables with robust jacket materials, correct gauge sizing, and durable terminations to handle real-world vibration and weather exposure. Our assemblies often include lot control, inspection logs, and custom labeling to support audit compliance and fleet maintenance.

Data Cable Assemblies: Precision Where It Counts

In mission-critical environments, data transmission isn't just about speed — it's about shielding, integrity, and environmental resilience. STI-CO® specializes in data cable assemblies that are purpose-built for integration into complex vehicle platforms, control systems, and communication infrastructure.

Unlike commercial Ethernet cables, our assemblies are engineered for harsh environments where EMI shielding, custom lengths, and rugged connectors are essential. These cables often support:

• Surveillance and video systems
  
  
• Control interfaces for radios or telemetry
  
  
• Hybrid signal harnesses that combine RF, data, and power
  
  

We build these assemblies to spec or through collaborative design with your engineering team, ensuring proper signal routing, environmental protection, and system-wide compatibility — all backed by AS9100D, ISO 9001:2015, and IPC/WHMA-A-620 manufacturing standards.

Our Commitment to Quality, Traceability, and Compliance

STI-CO®’s U.S.-based manufacturing facility is optimized for both speed and compliance. Across all cable types, we offer:

• AS9100D & ISO 9001:2015 certified quality management
  
  
• IPC/WHMA-A-620 workmanship conformance
  
  
• Lot traceability and serialized assemblies
  
  
• Custom labeling and documentation
  
  
• CNC prototyping and engineering support
  
  

Whether you bring a drawing or need engineering input, STI-CO® partners with you from design to delivery.

Build Smarter. Build with STI-CO®

From high-frequency RF to power and hybrid cable kits, STI-CO® delivers application-specific cable assemblies that meet the highest performance and compliance standards.

Explore our capabilities at: https://sti-co.com/cable-assemblies/

Ready to quote a project? Contact us at sales@sti-co.com