X39-25-P Series | 0.039 [1.00] Centers | 0.250 [6.35] Full Stroke | Palladium Plungers

Designed for loaded board testing.

39mil 250 Stroke Socketless Probe for loaded board testing

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.

Spring Force

Begin building your part number.

TUBE SELECTION

Letter	Material	Average Resistance	Current Rating ¹ 120°C (204°C) ³
P	Nickel silver/ID precious metal clad	< 25 milliohms	3.4 (4.7) AMPS ³

TIP STYLE SELECTION.
Use the drop-down menu at right to filter your choices by target type.
Standard material is heat-treated steel/plated palladium over nickel.
Choose

for steel plungers, if available.

SPRING FORCE SELECTION

Letter	Spring Force	Preload	@ 0.167 [4.24] Stroke	Material	Cycle Life @ 0.167 [4.24] Stroke
L	Low	1.2 [34g/0.33N]	3.0 [85g/0.83N]	MW	1,000,000
S	Standard	1.1 [31g/0.31N]	4.3 [122g/1.20N]	MW	1,000,000
H	High	2.4 [68g/0.67N]	5.6 [159g/1.56N]	MW	1,000,000
Y	Elevated	3.2 [91g/0.89N]	8.0 [227g/2.22N]	SS	25,000

OPTION

Letter	Description
P	Heat treated steel/plated palladium over nickel (see tip styles for availability)

You may add your Part Number to your Order.

¹ Current Rating is affected by spring material and lubrication choice. Please refer to Current Carrying Capacity and Testing in Extreme Temperature application notes for more details.

² Maximum plunger OD should be used to calculate minimum guide plate clearance holes.

³ Working Temperature Range: -45°C to 120°C with lubrication. SS springs can be used up to 204°C without lubrication.

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