72T Series Tungsten Probes

Probes are priced per probe, not box
10/box 20/box 5/box 25/box
Our quantity discounts:
Quantity 50+ 250+ 500+
Price $4.99 $4.73 $4.46

Minimum quantity for "72T Series Tungsten Probes" is 20.

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The 72T Series probes are constructed from solid 20 mil tungsten wire with an electrochemically etched taper.

Most common contact probe.
Inexpensive, cost effective probe.
Available in a wide range of radii, lengths, and custom bends.
General purpose micro probing.

All prices are EACH PROBE, NOT PER BOX
Sold in boxes of  10, 20, or 25.

What size probe should I use?

The typical recommendation is to use a probe diameter that is half to two thirds the size of the contact. Remember, APT's probes are sold by the radius, so you must double the number to determine the diameter. It is normally found that a radius larger than 20 microns does not yield lower contact resistance. An example is: The contact pad is 10 microns, using the recommendation, you would then use a probe with a radius of 2.5 - 3.5 microns. (5- 7 micron diameter)

Why are some probes etch and others ground?

There are two common ways to manufacture the probe's taper and radius: 1.Electrochemically etch 2.Mechanically grind Why is one method chosen over another? 1.The base material is the driving reason: a. Tungsten, Tungsten rhenium are typically electrochemically etched b. Paliney® 7, beryllium copper, tungsten carbide, steel are generally mechanically ground materials This is the short answer, for more details on the subject please refer to the link in the Technical Resources Area under Probe Question's.

Dimensions of the 72T Series solid tungsten probe with electrochemically etched taper and radius:

Straight version:

72T probe - straight


72T with 45 degree bend:

72T tungsten probe with 45 degree bend

72T with 60 degree bend:

72T tungsten probe with 60 degree bend






Please refer to this section for American Probe & Technologies cross reference to other manufactures model numbers.


Cascade Part Number
Equivalent APT Model Number
17583 72T-J3/20x1.25"
17680 72T-J3/70x1.25"
17882 72T-J3/200x1.25"
27480 72T-J3/500x1.25"
35837 72T-F3/500x1.25"
36582 72T-F3/50x1.25"
40403 72T-G3/10x1.25"
45256 72T-F3/1000 x 1.25"
45257 72T-F3/2000x1.25"
46230 72T-H3/06x1.25"
46328 72T-D3/120
47167 72T-C4/20x1.25"
48368 72T-J3/20x0.59"
50483 72T-C3/05x1.25"
64062 72T-J3/250x1.25"
64127 72T-F3/12 x 1.25"
65299 72TS-C4/20 x 0.5"
65989 72T-J3/500 x 1.25"
65990 72T-J3/1000x1.25"
65998 72T-J3/06x1.25"
69321 72T-F3/05x1.25"
69322 72T-F3/120x1.25"
69323 72T-F3/200x1.25"
69673 72T-J3/70x2"
70910 72T-J3/750x1.25"
70920 72T-J3/100x1.25"
71431 72T-F3/250x1.25"
72302 72T-F4/12x1.25"
72418 72T-J3/200 x 2"
76307 72T-J3/50x1.25"
76372 72T-J3/70 x 2"
77963 72T-J3/70x1.85"


Karl Suss Part Number
Equivalent APT Model Number
K00-17583 72T-J3/20x1.25"
K00-17680 72T-J3/70x1.25"
K00-17882 72T-J3/200x1.25"
K00-35837 72T-F3/500x1.25"
K00-36582 72T-F3/50x1.25"
K00-40403 72T-G3/10x1.25"
K00-45256 72T-F3/1000X1.25"
K00-45257 72T-F3/2000x1.25"
K00-46230 72T-H3/06x1.25"
K00-46328 72T-D3/120x1.25"
K00-47167 72T-C4/20x1.25"
K00-48368 72T-J3/20x0.59"


Probing Solutions Part Number
Equivalent APT Model Number
407B 72T-H3/06 x 1.25
407B-10 72T-D3/10 x 1.25
407B-5 72T-D3/50 x 1.25
407B-10 72T-D3/100 x 1.25


Semiprobe Part Number
Equivalent APT Model Number
DC-11002 72T-J3/20 x 1.25
DC-11004 72T-J3/10 x 1.25
DC-11005 72T-J3/50 x 1.25
DC-11006 72T-J3/70 x 1.25
DC-11007 72T-J3/250 x 1.25
DC-11008 72T-J3/100 x 1.25
DC-11009 72T-J3/125 x 1.25
DC-11010 72T-J3/06 x 1.25
DC-11013 72T-J3/200 x 1.25
DC-11029 72T-J3/075 x 1.25
DC-11030 72T-J3/12 x 1.25