Ingun GKS-550 307 090 A 1500 Probe, Chisel Tip, 50mil

The INGUN GKS-550 307 090 A 1500 (INGUN item GKS-550-0008) is a short-body fine-pitch spring-loaded test probe for the 1.27 mm (50 mil) grid, seated in a KS-550 or KS-550 WL receptacle.

Tip style 07 is a 90° three-edged chisel, self-cleaning: its edges meet in a line rather than a point, so the tip scrubs a short track across a flat pad as the probe compresses, cutting through oxide and flux residue while spreading load more kindly than a needle. The GKS-550 body puts that tip on a 34.6 mm probe rather than the 43.2 mm of the equivalent GKS-050, with the full 4.3 mm working stroke retained — the choice when the fixture stack-up is shallow. This is the heavier-sprung of the two stocked variants: 1.5 N against 1 N, pre-load 0.66 N against 0.44 N, and a 3 A rating against 2 A. Reach for it when the 1 N probe reads intermittently on oxidised or reworked pads.

• Tip style 07, 90° 3-edged chisel, self-cleaning; tip diameter 0.9 mm (0.035 in)
• Barrel diameter 0.78 mm (0.03 in), total length 34.6 mm (1.36 in)
• Grid pitch 1.27 mm (50 mil); minimum centre distance 1.22 mm (48 mil)
• Spring force 1.5 N at working stroke, pre-load 0.66 N
• Working stroke 4.3 mm, maximum stroke 6.35 mm
• Current rating 3 A, contact resistance 20 mΩ typical
• CuBe plunger, gold-plated
• Receptacles: KS-550, KS-550 WL