Special Sun AHM Technology(Shanghai)Co.,Ltd.
SPS - ISO Factory for SMD and through-hole Diodes and Rectifiers since 2000

SPS Surface Mount SMD Diode Rectifiers Tape and Reel Packing

General Purpose Rectifiers:

SMAF M1 THRU M7 (M1, M2, M3, M4, M5, M6, M7)

SMA(DO-214AC) S2A THRU S2M ( S2A, S2B, S2D, S2G, S2J, S2K, S2M) 

High Efficiency Rectifiers:

SMA-J US1A THRU US1M (US1A, US1B, US1D, US1G, US1J, US1K, US1M) 

SMB(DO-214AA) US3A THRU US3M (US3A, US3B, US3D, US3G, US3J, US3K, US3M) 

Transient Voltage Suppressors:

SMC 1500W SMCJ Series SMCJ5.0CA THRU SMCJ440CA 

SMB 600W SMBJ Series SMBJ5.0CA THRU SMBJ440CA 

Schottey Barrier Rectifiers:

SMAJ(DO-214AC) SS22 THRU SS210 (SS22, SS23, SS24, SS25, SS26, SS28, SS210) 

SMA(DO-214AC) SS32 THRU SS310 (SS32, SS33, SS34, SS35, SS36, SS38, SS39,SS310) 

Silicon Planar Zener Diodes:

LL-34 BZV55C2V4 THRU BZV55C75 (BZV55C2V4,BZV55C2V7, BZV55C15,BZV55C27BZV55C75) 

SOT-23 BZX84C2V0 THRU BZX84C75 (BZX84C2V0, BZX84C5V1, BZX84C15, BZX84C27BZX84C75) 

Use a digital multimeter to distinguish the positive and negative poles of the SMD diode:

Adjust the multimeter to the diode position, put the test leads on both sides of the SMD diode, and then see the value on the display screen:

(1). the screen display is 1. It means the resistance is infinite, the black test pen is the negative pole, and the red test pen is the positive pole;

(2). the screen display is about.600, which has a numerical value. at the same time, the multimeter will make a beeping sound. Then the red test pen is the negative pole, and the black test pen is the positive pole;

(3). of course, there is a third situation, that is, no matter how the test leads are placed, the display value on the screen is close to 0, and the multimeter makes a sound, which indicates that the SMD diode has been broken down, and cannot be used anymore. 

Check the best offer with SPS, a professional factory of diode rectifiers, bridge rectifiers, transistors etc.