1. Spring Terminal Technology
Introduction to CAGE CLAMP® and Mersen’s spring terminal technology

2. Spring Terminal Technology
Mersen Spring Terminals versus Screw Terminals
Wire retention spring reinforces high contact pressure
Wire surrounded on all four sides
“S” bend provides defined contact area

3. Spring Terminal Technology
The Spring Terminal Advantage
Higher Degree of Reliability
Low contact resistance
Vibration, corrosion and temperature cycling resistant
Lower Total System Cost
Material and labor
Increased Ease-of-Use
Tool-free, simple to operate
CAGE CLAMP has over 25 years of field experience and acceptance!

4. Spring Terminal Technology
Higher Reliability – Contact Resistance
Every electrical connection resists the flow of electrons
As the flow is impeded, voltage is lost, heat is generated
Contact resistance of screw terminals can vary as vibration, corrosion and temperature cycling impact the contact point
Spring terminal technology has very low contact resistance which is maintained over time even in hostile environments
Micro-scale image of two contact surfaces

5. Spring Terminal Technology
Higher Reliability – Performance Under Vibration
Tested under vibration to 2000 Hz, acceleration up to 80G
Tested for resonant frequencies from 5Hz to 250Hz
Tested to shocks of 109G in the X, Y and Z-axis
No contact failure, no wire damage, maintenance free

6. Spring Terminal Technology
Higher Reliability – Performance Under Corrosion
Spring terminal material is made of corrosion resistant material (stainless steel)
Tin-plated current carrying bar ensures gas-tight connection

7. Spring Terminal Technology
Higher Reliability – Performance Under Temperature Cycling
As temperatures fluctuate metals expand and contract
Different metals expand and contract at different rates and conductors deform
Screw terminals are static, expansion and contraction will have a negative impact on contact pressure
Spring terminals are dynamic and will compensate for changes

8. Spring Terminal Technology
Lower Total Cost – Material and Labor
Reduce installation time by up to 75% by installing conductors without the need for tools or torque specifications
Flip open and close the terminal lever in just seconds
Maintenance free, spring terminals eliminate the need for routine screw terminal re-tightening

9. Spring Terminal Technology
Increased Ease-of-Use
No tools required – Wire can be inserted and terminated into the fuseholder without the use of a screwdriver or other tools
Simple to operate – No torque specs to follow, just open and close terminal via the lever
Superior connection every time, independent of operator skill
Terminal Closed
Terminal Open

10. Spring Terminal Technology
Features and Benefits – Summary
Higher
Reliability
Low contact resistance
Superior performance under vibration
Corrosion resistant
Superior performance under temperature cycling
Lower
Total Cost
Reduce installation time by up to 75%
Maintenance Free
Increased
Ease-of-Use
No tool required
Superior connection independent of operator skill

11. Spring Terminal Technology
Product Offering
USG series fuseholder now available for class CC (USGCC), midget class (USGM) and photovoltaic midget class (USGM-HEL)
Mersen is the first manufacturer to offer screw-less, spring pressure, wire termination technology into a power fuseholder, delivering the best of both technologies to its customers