Hello experts,
Can anyone educate me on how to test MBR3045CT and SR3045LCT Schottky diodes? I'm totally a newbie in electronics, so forgive me if I have cheap tools. In my effort to repair a Gigabyte PSU, I stumbled upon the two diodes, which I suspect are leaky. I tested this with my two cheap multimeters and the newly bought LCR-T4 MC328, and I got confusing results. Below are my test results.
Aneng ST182 Meter.
Diode mode.
MBR3045CT:
Diode mode
Pin 2-1 - 0.150v
Pin 2-3 - 0.150v
Both show OL on reverse both shows OL on reverse
SR3045LCT:
Diode mode.
Pin 2-1 - 0.096v
Pin 2-3 - 0.096v
Both show OL on reverse
Alexan meter reads slightly lower
MBR3045CT
Pin 2-1 - 0.130v
Pin 2-3 - 0.130v
SR3045LCT:
Pin 2-1 - 0.080v
Pin 2-1 - 0.080v
Both show OL on reverse
Resistance reading.
MBR3045CT:
Pin 2-1 Pin and 2-3 445K ohms. When I reverse the leads, I get 149K
pin 1-3 reads 140K both reverse and forward.
SR3045LCT:
Pin 2-1 Pin and 2-3 223 ohms. When I reverse the leads, I get 15K and 16Kohms readings.
pin 1-3 reads 15K both reverse and forward.
I uploaded photo's of the ESR meter readings.
Can anyone educate me on how to test MBR3045CT and SR3045LCT Schottky diodes? I'm totally a newbie in electronics, so forgive me if I have cheap tools. In my effort to repair a Gigabyte PSU, I stumbled upon the two diodes, which I suspect are leaky. I tested this with my two cheap multimeters and the newly bought LCR-T4 MC328, and I got confusing results. Below are my test results.
Aneng ST182 Meter.
Diode mode.
MBR3045CT:
Diode mode
Pin 2-1 - 0.150v
Pin 2-3 - 0.150v
Both show OL on reverse both shows OL on reverse
SR3045LCT:
Diode mode.
Pin 2-1 - 0.096v
Pin 2-3 - 0.096v
Both show OL on reverse
Alexan meter reads slightly lower
MBR3045CT
Pin 2-1 - 0.130v
Pin 2-3 - 0.130v
SR3045LCT:
Pin 2-1 - 0.080v
Pin 2-1 - 0.080v
Both show OL on reverse
Resistance reading.
MBR3045CT:
Pin 2-1 Pin and 2-3 445K ohms. When I reverse the leads, I get 149K
pin 1-3 reads 140K both reverse and forward.
SR3045LCT:
Pin 2-1 Pin and 2-3 223 ohms. When I reverse the leads, I get 15K and 16Kohms readings.
pin 1-3 reads 15K both reverse and forward.
I uploaded photo's of the ESR meter readings.
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