This vibration motor is ideal for haptic applications where a small ERM vibration motor is required. Its supplied on tape / reel (1K pcs) and is designed to be used with pick and place machines. Care must be taken to follow the reflow temperature profile. Do not expose our SMD vibration motors to liquids. This includes flux washes or conformal coatings. Except for a slightly different PCB footprint, this vibration motor has the same electrical / mechanical specifications as our Z30C1T8219651. We developed the Z30C1T8219731 because its improved mechanical design increases our manufacturing efficiency and production yields. The S3Z06B821-731 will most likely be discontinued in the future. Our R&D team states that the S3Z06B821-731 is compatible with the PCB pad layout of the S3Z06B821-731.