LM78S40N/NOPB , Buck, Boost Switching Regulator IC Positive or Negative Adjustable 1.25V 1 Output 1.5A (Switch) 16-DIP (0.300", 7.62mm). we specialize in Hotenda LM78S40N/NOPB electronic components. LM78S40N/NOPB can be shipped within 24 hours after order.