Rjb (junction-to-board) JEDEC Test Fixture

The Analysis Tech Rjb Thermal Test Fixture embodies the JEDEC standard 51-8 for measuring the junction-to-board thermal resistance, Rjb. The fixture accommodate either the small or large JEDEC standard thermal test coupon sizes. The two piece design affords easy board loading and test setup modification. Note: the photo shows the fixture with the heat insulation/shields removed.

This fixture clamps on both sides of a JEDEC-board. Thermal connection with the board is through a opposing pair of square-ring conductive jaws. These jaws contact the board and extract all of the heat generated by the component and rejects it into the liquid cooled body of the fixture. A thermocouple in a via placed at the middle-edge of the component body provides the reference temperature for this test. (Note: test PWBs are not included with this fixture.)

The coolant requirements for this test fixture are fairly minimal: at least 1 gpm (4 lpm) with a cooling capacity of at least 100 watts at a set point of 18C. Coolant lines are provided with 1/8 NPT connectors.

Ordering Information

Ordering information: part number "JEDEC Rjb".
Terms: Ex Works (EXW)