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Measurement Parameters: BVcbo, Icbo Collector- Base voltage, Collector- Base
Cut-off Current
Application Test name: Ic-Vcbo 2
Application Test setup name: (My Favorite Setup -> Example_AT): Ic-Vcbo 2
Device used in the example: MJL4281AG
Connection inside the N1259A Test Fixture: Use the figure shown in this section
Application description:
Measures Collector current vs. Collector-Base voltage characteristics and extracts
Collector-Base breakdown voltage BVcbo and Collector Cut-off Current (Icbo) at
open emitter condition.
Measurement is aborted just after the detection of the drain breakdown.
Connection inside the N1259A Test Fixture
Use the following connection inside the N1259A test fixture
Open the N1259A test fixture cover, and connect the test leads shown in figure 3-2
by following the step numbers as shown in figure 3-17 and the following procedure
steps.
Note: The available colors of the leads are black and red only. The lead color used in
figure 3-17 is for reference only.
The numbers of the procedure steps correspond to the numbers on the drawing for
connecting the test leads.
NOTE: If measurement is made with Opt.300 Module Selector, use the procedure
shown in Appendix 2.
[PROCEDURE]
Step 1. Insert the power BJT (example: MJL4281AG) into the socket on the N1259A.
Make sure the device pin name matches to the socket numbers shown in
figure 3-17.
Step 2. Connect the Force of the HVSMU1 to the terminal 2 Force (Collector) on the
Inline Package Socket.
Step 3. Connect the GNDU1 Force to the terminal 1 Force (Base) on the Inline Pack-
age Socket.
Step 4. Connect the GNDU1 Sense to the terminal 1 Sense (Base) on the Inline
Package Socket.
Close the N1259A fixture cover.
3-1-5. BVcbo and Icbo-Vcb measurement
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