PA4ZX – Heavy Spring


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.
Qty Price Each (£ GBP, EX VAT)
1 - 49 1.31
50 - 99 0.93
100 - 249 0.82
250 - 499 0.72
500 - 999 0.65
1000 - 29999 0.59
Available Stock : 28

Lead time for additional qty approximately: 12 days

Single Item Price from: £1.31

Test Probe Specification

Full travel
6.35mm (.250″)
Working travel
4.24mm (.167″)
Spring force
at wkg travel
‘L’ Light spring
57g (2.0oz)
‘S’ Light spring
114g (4.0oz)
‘X’ Heavy spring
170g (6.0oz)
‘U’ Ultra heavy spring
283g (10.0oz)
Current rating DC (maximum continuous)
cont shown with tip style
Operating temperature
-55’C – +150’C (or shown with tip style if different)
Minimum test centres (apart from large heads)

2.54mm (.100″)

Receptacle Specification

Mounting hole size: 1.70mm softer material/1.75mm harder material.

1.75mm drill is most commonly used:
1.70mm holes, drill part no. DA3. 1.75mm holes, drill part no. DA3A.
Receptacle insertion tool part nos. TA3, TA4A

How To Use

Product Selection
Fitment & Usage
After Care