# How do I test a diode for Reverse Voltage Leakage Current on my curve tracer?

### 問題：

How do I test a diode for Reverse Voltage Leakage Current on my curve tracer?

### 答案：

Reverse Voltage Leakage Current

What It Is:

Reverse voltage leakage current is the IR that flows when the specified value of VR is applied to the anode.

On the curve tracer, the Collector Supply drives the anode.

What The Display Shows:

The display shows VR on the horizontal axis, and the resulting IR on the vertical axis.  The specification is met when with VR at the specified value, IR is less than or equal to the specified maximum.

How To Do It:

1. Set controls:

A:Max Peak Volts to the lowest setting above the specified VR

B: Max Peak Power Watts to the lowest setting that satisfies (IR x VR)

C: Horizontal Volts/Div to display VR between the 5th and 10th horizontal divisions

D: Vertical Current/Div to display the IR between the 5th and 10th vertical divisions

E: Collector Supply Polarity to -DC

F: Configuration to (Base/Open, Emitter/Common)

G: Variable Collector Supply to minimum % (full ccw)

H: DotCursor ON

2. Apply power to the diode:

A: Position the Left/Right switch as appropriate

B: Slowly increase the Variable Collector Supply % until the specified VR is attained

3. Compare to data sheet specifications:

Check that at the specified VR, IR is less than or equal to the specified maximum