Transient suppression for 24V rails
The 1.5SMC24A-E3/57T: It clamps transients at 33.2V maximum when the surge current hits 45.2A, protecting downstream silicon from overvoltage events on a 20.5V nominal rail. This is the standard protection choice for 24V industrial control supplies, automotive auxiliary circuits, and telecom line cards.
Package and board fit
The surface-mount body measures roughly 7.1mm x 6.2mm with a 2.6mm height — the copper pad area under the cathode tab sets the thermal impedance for dissipating the 1500W pulse. The base product number 1.5SMC24 means the A suffix indicates a 5% tolerance on the breakdown voltage — the -/57T reel suffix is Vishay's green/halogen-free plating code.