CCC and Connector Design: Why Temperature Rise Matters
What Is CCC, and Why Is It Derated?
Current Carrying Capacity (CCC) is one of the most important — and sometimes overlooked — connector specifications, especially as system power requirements skyrocket. In simple terms, CCC defines how much current a connector contact can handle before the heat generated pushes it beyond safe material limits.
Heat is produced when current flows through a contact due to I²R (resistive) heating. To ensure safety and reliability, Samtec tests CCC in a controlled environment per the industry standard EIA-364-70 “Temperature Rise Versus Current”. The goal: measure the current that causes a 30 °C rise above ambient temperature, then apply a 20% derating.
Why the derating? Think of this as a factor of safety. Real-world applications introduce variability — airflow, copper trace width, ambient temps — and this margin helps ensure reliable operation across a wide range of systems.
We walk through this full setup in our original CCC overview blog, where you’ll find how we test configurations like 1×1, 2×4, and “all pins powered” to simulate real-world system loads.
Why Power Demands Are Rising — And Why CCC Matters More Than Ever
The future of electronic systems is smaller, faster, and significantly more power-hungry. Whether it’s AI/ML accelerators, data center servers, or chiplet-based architectures, CCC plays a growing role in connector selection and overall system reliability.
Here’s why engineers and designers should care more than ever about power:
- AI and Accelerated Compute: Models with billions of parameters require more GPUs or specialized silicon, driving power delivery into the hundreds of amps.
- Hyperscale Data Centers: Energy efficiency, thermal budgets, and uptime all depend on smart power path decisions.
- Chiplets and Co-Packaged Optics: Densely packed silicon demands smaller connectors that still deliver serious current without overheating.
And in real-world systems, you rarely power just one pin. That’s why our CCC testing includes data for multiple contact configurations — from 2-pin up to 100-pin setups. You can see those breakdowns in this CCC FAQ blog.
Understanding CCC isn’t just a thermal consideration. It empowers you to right-size your connector, avoid overdesign, improve system density, and give your design some thermal breathing room.
Samtec’s Approach: Data, Tools, and Products to Empower Your Design
We want to be transparent, detailed, and reproducible with the data we publish. That’s why Samtec makes detailed CCC test results available through qualification reports on our product pages, giving you confidence in your power delivery design.
To make the process even easier, we continue to add series to our Interactive Current Carrying Capacity Tools found on select series pages.
With this tool, engineers can:
- Select their temperature rise target
- Choose derating margins
- View current vs. temp graphs based on the selected configuration
You can explore this tool and how it works in our CCC tool announcement blog.
Here are a few featured High-Power Connector Families
- mPOWER® (UMPT/UMPS) – Ultra micro design, up to 18 A per blade
- EXTreme Ten60Power™ (ET60T/ET60S) – Mixed power/signal, up to 60 A per blade
- AcceleRate® HP (APM6/APF6) – High-density signal + power in a low-profile form factor
If you’re solving power challenges in a server rack, AI accelerator, or cutting-edge silicon packages, understanding and designing with CCC in mind will save you from thermal and performance issues later.
Samtec is always here to help — from transparent qualification reports to hands-on design support and ever-improving web tools.
Need help with your power delivery path? Connect with our technical team at [email protected] or start exploring connector families with CCC data on samtec.com.
