Ingun GKS-550 214 050 A 1000, Crown Tip, 50mil

The INGUN GKS-550 214 050 A 1000 (INGUN item GKS-550-0037) 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 14 is a self-cleaning four-point crown — four points that straddle a rounded target and grip it from all sides, holding the probe on a pin, post or trimmed lead where a flat tip would slide off, and splitting the load so it bites through oxide without the punch-through risk of a needle. At 0.5 mm it is the smallest crown made, which is what lets it work at 50 mil (1.27 mm) pitch. The GKS-550 body is 34.6 mm against the 43.2 mm of the equivalent GKS-050, for shallower fixture stack-ups, and this particular item carries an unusually high 5 A rating for a probe of this diameter — well above the 2 A of most GKS-550 variants.

• Tip style 14, 4-point crown, self-cleaning; tip diameter 0.5 mm (0.019 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 1.27 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 5 A, contact resistance 20 mΩ typical
• Steel plunger, gold-plated
• Contacts pins, posts and pads; receptacles KS-550, KS-550 WL. Operating range −40 °C to 80 °C