Model 600254 µHELIX^® Test Probes

Ordering Part Number	600254
Descriptive Model Name	S500*3800/700/70@350/S1300r/S0a
material	tube/spring (body): 304SS Plunger: SS20AP tool steel i/o end: 304SS
length	body: 3800 µm (0.150 inches) plunger: 1300 µm (0.051 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: 508 µm (0.020" i/o contact: annular ring ø=275 µm
plunger tip shape: rounded
alternate plunger tip shapes	Model 600253 with sharp tip Model 600255 with flat tip Model 600365 4-point crown
i/o contact shape: annular ring
alternate i/o ends	Contact AlphaTest Corporation
spring type	rectangular helix integral to tube
typical spring force	70 grams (3.15 oz) at 350  µm (0.014")
alternate spring force	Model 600253
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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