Ingun GKS-050 319 090 A 1000 Probe, Cupped Tip, 50mil

The INGUN GKS-050 319 090 A 1000 (INGUN item GKS-050-0326) is a fine-pitch spring-loaded test probe for the 1.27 mm (50 mil) grid. It seats in a KS-050 receptacle so probes can be changed from the top of the fixture as tips wear.

Tip style 19 is a 90° inverse cone with a slot cut across it, and is self-cleaning: the cone captures a rounded target — a solder bump, a trimmed lead, a wire end — while the slot edge scrapes residue off it as the probe compresses. That combination suits targets that stand proud of the board but are not reliably clean, where a plain cup would ride on oxide and a needle would slide off the dome. The 0.9 mm cone is generous for a 50 mil (1.27 mm) part, so it wants a target that genuinely sits at the centre of its keep-out. This is the lighter-sprung of the two GKS-050 319 090 variants stocked; the 1.5 N version is the one to reach for if contact proves marginal.

• Tip style 19, 90° inverse cone, slotted, self-cleaning; tip diameter 0.9 mm (0.035 in)
• Barrel diameter 0.78 mm (0.03 in), total length 43.5 mm (1.71 in)
• Grid pitch 1.27 mm (50 mil)
• Spring force 1 N at working stroke, pre-load 0.44 N
• Working stroke 4.3 mm, maximum stroke 6.35 mm
• Current rating 3 A, contact resistance 20 mΩ typical
• CuBe plunger, gold-plated
• Receptacle: KS-050