1500 W peak pulse, 102 V standoff — automotive TVS for 12 V/24 V bus clamping
The 1.5SMC120AHR7G: Qualified to AEC-Q101, this Automotive-grade device operates across -55°C to 150°C junction temperature, making it suited for under-hood or chassis-mounted electronics where transient surges from load dump or alternator ripple must be clamped without exceeding the junction thermal budget.
Breakdown and clamping — what the ratings mean for the BOM
The minimum breakdown voltage of 114 V means the TVS starts conducting and clamping at that threshold, protecting downstream silicon rated for 100 V or less from exceeding its abs-max rating during a surge. With a clamping voltage of 165 V at 9.5 A peak pulse current, the device limits the transient to a level that a 150 V-rated MOSFET or controller can survive, provided the PCB trace inductance and TVS placement keep the loop tight.
Package and board integration
The DO-214AB footprint is standard for 1500 W TVS diodes — the copper pad area under the cathode tab directly sets the thermal resistance to ambient, so the PCB layout must allocate enough copper to dissipate the pulse energy without exceeding the 150°C junction limit.