Rjc Universal XY Power Test Fixture

The Analysis Tech R_jc Universal XY Test Fixture is a high-performance liquid-cooled heat sink for thermal testing of high-power modular-devices at dissipation of up to 2400 watts. This fixture is ideally suited for measuring junction-to-case thermal resistance and impedance on large power-module packages of all device types including IGBT mixed-modules, full and half bridges modules, and large MOSFET modules.  Thermal testing of these modules requires that they be firmly clamped to a high-capacity heat sink.  With the wide variety of power-modules in use today, providing a clamping solution to accommodate the various bolt-hole patterns and dimensions is a difficult task. The Rjc Universal XY fixture provides a universal clamping solution for 2 and 4 bolt modules within specified footprint area (see specifications below). A pneumatic clamp accessory plate provides the added ability to test smaller parts with a single air pressure controlled clamping point. This fixture offers both a coolant temperature thermocouple, ideal for transient Rjc measurement (JEDEC 51-14 method), as well as a Tc Sensor T spring-loaded thermocouple probe for traditional case-temperature-based Rjc measurement (Mil Std 883 method 1012).

Temperature controlled coolant water must be supplied to the fixture from a recirculating chiller with a recommended minimum of 1.6 gallon/minute (6 liters/min) at a pressure of 30 psi (210 kPa) for 2.4kW power dissipation. Complete mating pairs of drip-free liquid connectors are provided.

A top-mounted combination plug/screw connector or the side-mounted edge-card connector provides convenient connections gate signals, kelvin connections, and Tj sense connections. This design allows the fixture to be quickly reconfigured for any part-type by swapping the part-specific, two-connector wiring harness and repositioning the clamping bolts.