How to measure the quality of rectifier bridge

How to measure the quality of DB107S bridge rectifier? After getting a DB107S, place it as shown in the picture (the two pins below represent AC, connect to alternating current, and when measuring, the two pins of AC should be understood as a whole).

DB107S parameter description

Model: DB107S

Package: SOP-4

Features: High voltage rectifier bridge stack

Electrical parameters: 1A1000V

Chip material: SI

Forward current (Io): 1A

Number of chips: 4

Forward voltage (VF): 1.05

Chip size: 50MIL

Surge current Ifsm: 30A

Leakage current (Ir): 5uA

Working temperature: -55~+150℃

How to use a multimeter to measure the four pins of DB107S? Set the multimeter to the diode position (i.e. the buzzer position), and then measure the forward current of DB107S. The forward current is: (-) to (AC) (AC) to (+) just from top to bottom.

Step 1: (-) to (AC) The red test lead is connected to the (-) pole, and the black test lead is connected to the two pins of AC. Both are forward-conducting, and the resistance is about 500.

Step 2: Connect the red test lead to the AC pin and the black test lead to the (+) pole, both are forward-conducting, with a resistance of about 500.

Step 3: Measure the reverse resistance of step 1 and step 2, which is infinite 1

Step 1: Reverse resistance measurement method: (AC) to (-) Connect the red test lead to the two AC pins respectively, and the black test lead to the (-) pole. Both times are reverse resistance, which is infinite 1.

Step 2: Reverse resistance measurement method from (+) to (AC): connect the red test lead to the (+) pole and the black test lead to the two pins of AC. Both times are reverse resistance, that is, there is no infinite 1.

Step 4: Measure the resistance between the alternating currents. If the resistance is infinity or above 1, it means the diode is normal. If any set of measurement numbers is incorrect, it means there is a problem.

A simple mnemonic is: measure the forward conduction (-) to (AC) to (+), then measure the reverse resistance, and finally the AC mutual test.