X50-16 Series | .050 [1.27] Centers | .160 [4.06] Full Stroke

Designed for loaded board testing.


50mil 160 Stroke Socketless Probe for loaded board testing

Spring Force

spring force chart

Probe Selection

QA Technology offers many combinations of probes. You can build your probe by selecting the tube style, tip style and spring force for your specific application.

If you have questions at any time during the process, contact us at (603) 926-0348.

P/N X50-PR P16

Begin building your part number.

example: X50-PRP16S43PS

NOTE: P has already been selected for you as the default tube material.
        Current Rating1
Letter Material Average Resistance   SS @ 204°C
 P Nickel silver/ID precious metal clad <  41 milliohms   7.8 Amps
Select your tip material.
Digits Description
 S SteelHeat treated BeCu/gold plated over nickel.
 B Heat treated steel/gold plated over nickel.
Select your tip style.
Use the drop-down menu at right to filter your choices by target type.
Select your plunger length.
Letter Tip Style Availability Overall Probe Length (A) Plunger Length (B)
 H 39, 44 .870 [22.10] .220 [5.59]
 P 43, 63, 6R, 8R, 9R .930 [23.62] .280 [7.11]
Select your spring force.
Letter Spring Force Preload @ 2/3 Stroke Material Cycle Life @ Stroke
 L Low 1.1 [31] 3.0 [85] SS 300K @ .107 [2.72]
 S Standard 1.5 [43] 4.5 [128] SS 300K @ .107 [2.72]
 H High 2.0 [57] 6.0 [170] SS 100K @ .107 [2.72]
Select your option (if required).
Letter Description - no options are required.
 N No probe lubrication. Removing probe lubrication greatly reduces cycle life and should only be used in applications requiring operating temperatures below -45°C.

1Current Rating is affected by spring material and lubrication choices. Standard lubrication has a 204°C maximum operating temperature limit.
Before using probes near these current limits, please refer to Current Carrying Capacity and Operating Temperature Application Notes.

All specifications subject to change without notice. All dimensions are in [mm]. All spring forces are oz [gm]. US Patent No. 6,570,399 and 4,885,533