Model 600255 µHELIX^® Test Probes

Ordering Part Number	600255
Descriptive Model Name	S500*3800/700/70@350/S1300f/S0a
material	Plunger: SS20AP tool steel tube & spring (body): 304SS i/o end: 304SS
length	plunger: 1300 µm (0.051 inches) body: 3800 µm (0.150 inches)
Length Over All (LOA)	5,10 mm (0.201 inches)
Alternate Lengths in S500 Series (µHELIX® probes with 20 mil diameter)	3,05 mm LOA, S500*2440-P1 Group 3,74 mm LOA, S500*2440-P1 Group 5,10 mm LOA, S500*3800-P1 Group 6.50 mm LOA, Model 600462 7,10 mm LOA, S500*4500-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 14,10 mm LOA, S500*9500-P2 Group
diameter	body: 508 µm (0.020 inches) plunger: 356 µm (0.014 inches) i/o end: 254 µm x 20 µm wide annular ring
plunger tip shape: flat
alternate plunger tip shapes	Model 600253 wih sharp tip Model 600254 with round tip Model 600365 with 4-point crown
i/o probe-end shape: annular ring
alternate i/o end contact	Contact AlphaTest Corporation
spring type	rectangular helix integral to tube
typical spring force	70 grams (3.15 oz) at 350  µm (0.14")
alternate spring force	Model 600264
spring compliance	700 µm (0.028") maximum 350 µm (0.014") recommended
plating	body: 35 µinches Type II Au over Ni flash plunger: 35 µinches Type II Au over Ni flash
lubricant between plunger and probe body	none: gold on gold wiping contact
probe resistance	< 30 milliohms
µHELIX® spring life	> 106cycles
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")

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