The Coda-Pin brand is the industry standard in spring contact test probes. Our test probes have been used in the electronics production industry for over 40 years.
Founded by Colin Davis in 1980, we are still a family owned and run business.
Our technical team are dedicated to finding you the correct test probe for your application. If you can't find what you require on this web site then please contact us for help technical@coda-systems.co.uk
What is a test probe?
Test probe – test pin – spring probe – pogo pin. These are all generic terms to describe a component whose spring loaded tip will provide a reliable electrical contact to a target whose distance away may well be variable or indeterminate.
The traditional use for them is to make contact with printed circuit boards (PCBs) or electrical components, in order to test functionality and to measure the value of the components. They are widely used in vacuum test fixtures associated with automatic test equipment (ATE). They are also used inside a functional test station as part of a larger production line.
Please view our YouTube video about test probe and receptacle selection
See also our general purpose probes section.
For contacting loaded PCBs in automatic test equipment (ATE) with vacuum, pneumatic or mechanically operated fixtures. Available in 2.54mm, 1.91mm & 1.27mm test centre spacings.
2.54mm / 0.10" test centres
The PA4 Series is the universal size for use at 2.54mm test centres in the majority of ATE test fixtures. It has a very wide range of tip styles for almost all test targets. Additionally, a wide choice of spring forces is available. The ST-PA4 series adds hardened steel tips which ensure an exceptional resistance to wear in high volume PCB production runs. The LF-PA4 series has hardened tips, extra resilient plated surfaces and an enhanced pre-loaded spring pressure to enable good penetration of the tough residual contamination often found on the surface of many lead-free solders.
Test Probe Specification
| Full travel |
6.35mm (.250″)
|
| Working travel |
4.24mm (.167″)
|
| Spring force |
at wkg travel
|
|
‘L’ Extra light spring
|
57g (2.0oz)
|
|
‘S’ Light spring
|
114g (4.0oz)
|
|
‘X’ Heavy spring
|
170g (6.0oz)
|
|
‘E’ Extra heavy
|
227g (8.0oz)
|
|
‘U’ Ultra heavy spring
|
283g (10.0oz)
|
| Current rating DC (maximum continuous) |
8 amps unless otherwise shown in extra specifications tab
|
| Minimum test centres (except for large heads) |
2.54mm (.100″)
|
| Temperature range |
-55’C – +150’C (except where shown on certain products)
|
Receptacle Specification
Mounting hole size: 1.70mm softer material/1.75mm harder material.
Product Selection (PDF)
Watch our YouTube video about test probe and receptacle selection
Fitment & Usage (PDF)
After Care (PDF)
1.91mm / 0.075" test centres
The LPA2 Series is the universal size for use at 1.91mm test centres in the majority of ATE test fixtures. It has a very wide range of tip styles for almost all test targets. Additionally, a wide choice of spring forces is available. The ST-LPA2 series adds hardened steel tips which ensure an exceptional resistance to wear in high volume PCB production runs. The LF-LPA2 series has hardened tips, extra resilient plated surfaces and an enhanced pre-loaded spring pressure to enable good penetration of the tough residual contamination often found on the surface of many lead-free solders.
Test Probe Specification
| Full travel |
6.35mm (.250″)
|
| Working travel |
4.24mm (.167″)
|
| Spring force | at wkg travel |
| ‘S’ Light spring | 114g (4.0oz) |
| ‘X’ Heavy spring | 170g (6.0oz) |
| ‘U’ Ultra heavy spring | 227g (8.0oz) |
| Current rating DC (maximum continuous) | 6 amps |
| Minimum test centres | 1.91mm (.075″) |
| Temperature range | -55’C – + 150’C |
Receptacle Specification
Mounting hole size: 1.35/1.4mm.
1.4mm drill is most commonly used:
Product Selection (PDF)
Watch our YouTube video about test probe and receptacle selection
Fitment & Usage (PDF)
After Care (PDF)
1.27mm / 0.050" test centre
The LPC1 Series is the universal size for use at 1.27mm test centres in the majority of ATE test fixtures. It has a very wide range of tip styles for almost all test targets. Additionally, a wide choice of spring forces is available. The ST-LPC1 series adds hardened steel tips which ensure an exceptional resistance to wear in high volume PCB production runs. The LF-LPC1 series has hardened tips, extra resilient plated surfaces and an enhanced pre-loaded spring pressure to enable good penetration of the tough residual contamination often found on the surface of many lead-free solders.
Test Probe Specification
| Full travel | 6.35mm (.250″) |
| Working travel | 4.24mm (.167″) |
| Spring force | at wkg travel |
| ‘S’ Light spring | 114g (4.0oz) |
| ‘X’ Heavy spring | 170g (6.0oz) |
| ‘U’ Ultra heavy spring | 227g (8oz) |
| Minimum test centres | 1.27mm (.050″) |
| Temperature range | -55’C to +150’C |
Receptacle Specifications
Mounting hole size: 0.97/0.99mm.
0.95mm drill is most commonly used:
Product Selection (PDF)
Watch our YouTube video about test probe and receptacle selection
Fitment & Usage (PDF)
After Care (PDF)
