This example shows a WURTH SMPS power transformer (#750341144)
The part has 6 flat SMT contacts on the bottom of the transformer, and presents a problem for standard Kelvin pin type connections
The solution here is to use two vertical spring probes for each pin, mounted in a locating recess.
The locating recess also provides a quick and easy location guide for the transformer and the yellow plate is spring loaded.
When the clamp is engaged, the plate lowers and the transformer is accurately and evenly pushed onto the test pins..
Each pin still has two connections, still allowing a true Kelvin connection to the item under test.
This in turn allows the AT Tester to compensate out the effects of the fixture wiring.
This is especially important when coil resistances are low (typically <1.0 Ohm) where contact resistance becomes more of a factor.
Operation lifetime is in excess of 50,000 insertions.
This fixture was manufactured by our fixturing partner Wilco Control Systems.
Typical cost around - 525 USD
Typical life time > 50,000 tests
Typical cost per test < 0.01 USD