Model 600623 µHELIX®Test Probes
| Ordering Part Number | 600623 |
| Descrpitive Model Name | S500*2440/400/30@200/S610f/S-635a |
| material | tube & spring (body): 304SS Plunger: SS20AP tool steel i/o end: 304SS |
| length | body: 2440 µm (0.096 inches) plunger: 610 µm (0.024 inches) |
| Length Over All (LOA) | 3,05 mm (0.120 inches) |
| Alternate Lengths in S500 Series Test-Probes | 3,05 mm LOA, S500*2440-P1 Group 5,60 mm LOA, S500*3000-P2 Group 6,40 mm LOA, S500*3800-P1 Group 7,10 mm LOA, S500*4500-P2 Group 8,00 mm LOA, S500*5500-P2 Group 8,25 mm LOA, S500*6350-P1 Group 10,15 mm LOA, S500*6350-P2 Group 10,40 mm LOA, S500*6600-P1 Group |
| diameter> | body: 508 µm (0.020 inches) plunger: 356 µm (0.014 inches) i/o end: 432 µm (0.017 inches) last 635 µm i/o contact: 275 µm (0.011 inches;) |
| plunger tip shape: flat |  |
| alternate plunger tip shapes for S500*2440-P1 Group | sharp, Model 600621 round, Model 600622, 4-point crown, Model 600624 |
| i/o contact: annular ring, 13 µm width |  |
| alternate i/o end configuration in S500*2440-P1 Group | 
Model 600420, S0a
600587, S-635c4 |
| spring type | rectangular helix integral to tube |
| spring force | 30 grams (1.1 oz) at 200 µm |
| spring compliance | 400 µm (0.016 inches) maximum 200 µm (0.008 inches) recommended |
| plating | body: 35 µinches Type II Gold plunger: 35 µinches Type II Gold For other plating, contact AlphaTest. |
| lubricant between plunger and probe body | none: gold on gold wiping contact |
| probe resistance | < 30 milliohms |
| μHELIX® spring life | > 106cycles at recommended compliance |
| installed pointing accuracy | drill accuracy ±20 µm (0.0008") |
| INSTALLATION NOTES: | |
| probe-guide drill size | #74; 572 µm (0.0225") |
| plunger-guide drill size | 1/64"; 397 µm (0.0156") |
| capture plate drill size | #76; 508 µm (0.020") |
| Recommended i/o end contact pad | =>254µm (0.010") Gold plated Minimum pad size 126µm (0.005") |
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