QA Tech 125-PRG2541S, 23A High Current Probe, Needle Tip, 125mil

The QA Technology 125-PRG2541S is a conventional spring probe from the 125-25 series — 125 mil (3.18 mm) centres, 0.250 in (6.35 mm) full stroke, 0.167 in (4.24 mm) working stroke — a range QA Technology built for loaded-board and high-current testing. It mounts in a 125-SD series socket so probes can be pulled and replaced from the top of the plate.

It is the spear-tipped sibling of the serrated 125-PRG2509S: the 41 tip is a 30° spear at ø0.059 in (1.50 mm), roughly half the diameter of the 09 serrated head. That makes it the one to choose when the target is a small pad or land that the wide serrated face would overhang, or when you need the concentrated point pressure of a spear to punch through flux on a small joint. Everything else matches: the G tube (nickel silver, OD gold plated, < 15 mΩ, 16.9 A at 120 °C and 23.0 A at 204 °C) and the standard S spring at 7.0 oz (198 g) at working stroke, rated for one million cycles.

• 41 spear tip, 30°, ø0.059 in (1.50 mm); heat-treated BeCu, gold over nickel
• 125 mil (3.18 mm) centres
• Working stroke 0.167 in (4.24 mm), full stroke 0.250 in (6.35 mm)
• Standard (S) spring: 7.0 oz (198 g / 1.95 N) at working stroke, 2.2 oz pre-load
• Stainless-steel spring, 1,000,000 cycle life at working stroke
• G tube: nickel silver, OD gold plated; average resistance < 15 mΩ
• 16.9 A at 120 °C (23.0 A at 204 °C)
• Working temperature −45 °C to 120 °C lubricated; to 204 °C unlubricated
• Sold per unit; requires a 125-SD 250 series socket