High Current Probe

montaggio HighCurrent

When we talk about high current we never think of the electrical testing sector, where most of the work is done working around 3 Amperes. So the Spring Contact Probes that can work at 5 Amperes are already considered High Current.

The High Current Spring Contact Probe produced by us can work with currents of up to 30-50 Amperes during electrical tests of few seconds duration.
Nevertheless, there are other situations in which Spring Contact Probes can be used, such as in testing equipment that has a longer service life. In this case it is necessary to work on particular technical characteristics that we can develop together with the customer.

High Current Probe Technical Data

Recommended minimum distance (grid-pitch)

The standard installation pitch for our High Current  Spring Contact Probe is from 3.18 mm to 4.75 mm.
We are able to produce High Current Probes of variable sizes and non-standard characteristics, depending on our customer needs.

Current rating

Thanks to special measures, during the construction phase and performing the silver-plating of the barrel and the spring, we produce High Current Probe standard with supported currents ranging from 10A to 30A.
We are also able to produce Spring Contact Probe parts that can withstand currents up to 50A.

Typical contact resistance

The choice of materials, the silver plating of components and the precision in assembly, allow our High Current Spring Contact Probe to have a contact resistance not exceeding 10mΏ.

Types of High Current

Spring Contact Probe High Current can be of two types:

  • High Current standard: what differentiates them from a normal Probe is the type of material and the type of plating treatment to which they are subjected. This allows it to have a lower resistance and consequently to have a higher current carrying capacity. In addition, the spring load is increased to ensure better contacting.
  • High Current with continuous plunger: in this case the plunger is continuous, i.e. it comes out of the barrel from both sides, forming a point to directly connect the wire on it. This ensures that the current does not pass through the spring, but only between the barrel and the plunger, thus favoring a greater flow of current for a longer time.

High Current Materials and Plating

In order for a Spring Contact Probe to have the characteristics of a High Current probe, we must guarantee a lower electrical resistance than the latter For this reason, the materials we use for its parts are the following:

  • for the barrel: silver plated brass or bronze;
  • for the spring: music wire silver plated, load from 100 to 1300 gr;
  • for the plunger: BeCu, gold plated or silver plated.

The final galvanic silver plating treatment serves to significantly improve the electrical conductivity of the components and to ensure the lowest possible resistance.

Silver is in fact one of the materials with the best conductivity characteristics.


For our standard High Current range (GLP3-HC/GLP4-HC/GLP5-HC) the receptacles are the same as those used for the Spring Contact Probe range for ICT:


to weld the wire directly in the receptacle


for crimping the wire inside the receptacle


to wrap the wire around the square end of the receptacle

Round Post

to insert the end of the receptacle in a special place

For High Current Probe with through plunger, the receptacle has the lower part open to allow for the passage of the plunger so as to weld directly the wire to its end.

High Current Head Shape

The greater the contact surface, the lower the risk of electric arc and wear of the Spring Contact Probe. For this reason, the heads most frequently used for High Current are 01, 03, 04, 08, 10, 11, 21, because they guarantee an excellent contact surface.

Thanks to Tecon technologies and our company structure, the diameter and milling characteristics of each head can be agreed upon with the customer according to their needs.

01 Concave
03 Flat head
04 Dome head
08 9 Point serrated
10 16 Points serrated
11 3 sided pyramid
21 4 points crown

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Tecon srl  | P.IVA 03780900233 | REA: VR-365047 | Cap. Soc. € 60.000 i.v.

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